Climetry
Climetry is a climate exposure intelligence platform for durability, corrosion, condensation and reliability screening.It transforms climate and atmospheric datasets into engineering-oriented exposure metrics and reports.
Definitions for engineering climate exposure assessment.
Climetry turns climate and atmospheric data into durability-oriented exposure metrics: humidity hours, condensation potential, corrosion screening, marine influence, pollution context and regional design envelopes.
View Demo ReportCore definitions
Short definitions for climate exposure intelligence.
These terms are used consistently across Climetry reports, articles, map overlays and professional analysis outputs.
Climate Exposure Intelligence
Climate Exposure Intelligence converts climate data into engineering indicators for environmental severity and qualification support.It focuses on exposure hours, thresholds, percentiles, corrosion drivers, condensation potential and location comparison rather than forecasts.
Climetry Environmental Year (CEY)
CEY is an 8760-hour representative environmental year derived from long-term climate data for durability and exposure analysis.CEY preserves hourly distributions needed for RH80, RH90, condensation, wetness and thermal-cycle calculations.
Climetry Exposure Class (CE)
CE is a location-based environmental severity class for corrosion, condensation, humidity and durability screening.CE classes summarize overall environmental severity and are not ISO 9223 corrosivity categories.
RH80 / RH90 exposure
RH80 and RH90 are counts of hours where relative humidity is at least 80% or 90%.These thresholds reveal persistent high-humidity exposure that annual averages can hide.
Condensation potential
Condensation potential estimates hours where air conditions create elevated surface-wetting risk.It is a screening indicator based on dew point, humidity and temperature context, not a measurement on a specific product surface.
Time of Wetness
Time of Wetness is the duration of conditions where surfaces are likely to remain wet enough to support corrosion processes.Climetry uses humidity and temperature exposure as a screening approximation for wetness-related environmental loading.
ISO-derived corrosivity indicators
ISO-derived corrosivity indicators estimate material-related atmospheric corrosivity from environmental inputs.They are separate from Climetry Exposure Classes and should be interpreted as screening indicators, not certified ISO site classifications.
What Climetry measures
Exposure metrics are counted, compared and explained.
The goal is not to replace laboratory qualification or site-specific field inspection. The goal is to make climate-driven environmental loading visible before products, cabinets, modules or infrastructure are deployed.
RH80 Hours
Hours where relative humidity is at least 80%.RH80 is used as a moisture exposure threshold because many materials, coatings, connectors and outdoor enclosures experience elevated wetness and corrosion susceptibility when air remains persistently humid. Climetry counts these hours from hourly climate data instead of relying only on monthly or annual averages.
RH90 Hours
Hours where relative humidity is at least 90%.RH90 represents more severe humidity exposure. It is especially relevant for electronics, insulation systems, corrosion-sensitive metals and locations where drying potential is limited. RH90 is reported separately because two locations with similar mean RH can have very different high-humidity tails.
Condensation Hours
Hours where the local air state indicates near-condensation or surface-wetting potential.The base model compares air temperature and dew point. Where surface temperature is unknown, Climetry uses a screening approximation based on dew-point spread and humidity conditions. The metric should be interpreted as condensation exposure potential, not as a guarantee that a specific product surface was wet.
Corrosion Exposure
A material-related atmospheric corrosivity screening indicator derived from moisture, temperature, marine influence and pollution context.Corrosion exposure combines time-of-wetness style humidity-temperature loading with environmental modifiers. Steel and aluminum corrosivity outputs are ISO-derived indicators based on ISO 9223 environmental inputs. They are separate from the Climetry Exposure Class.
Marine Influence
A coastal and atmospheric sea-salt exposure modifier.Marine influence is estimated from distance to coastline and, where available, CAMS marine aerosol data. Coastline distance provides a transparent first-order chloride proxy. CAMS data adds atmospheric context but is still treated as a screening layer rather than a direct site deposition measurement.
Pollution Exposure
A pollution modifier based on atmospheric composition indicators.Pollution exposure uses CAMS-derived indicators such as regional sulphur dioxide background, particulate matter and related atmospheric composition fields. CAMS SO2 is treated as coarse background context, not local measured concentration; nearby industrial sources may dominate actual site exposure.
Regional Climate Envelope
A distribution-based exposure profile for countries, states or custom regions.A regional climate envelope evaluates all relevant climate grid points inside a boundary and reports distributions such as median, P90, P95, P99 and maximum. This supports product qualification and site-screening decisions by showing not only a typical location, but the range of environments a product may face.
Climetry Environmental Year
A representative 8760-hour environmental year for durability screening.CEY is inspired by ISO 15927-4 reference-year principles but extends the selection variables toward environmental durability: temperature, relative humidity, dew point, RH80 hours, time of wetness and condensation potential. The goal is to preserve long-term hourly distributions rather than monthly means.
Data sources
Climate, atmosphere and geography are kept separate.
Climetry uses ERA5 for temperature, dew point, pressure and hourly climate processing. CAMS provides regional atmospheric composition context such as sea-salt aerosol, sulphur dioxide background and particulate matter. Coastline distance adds a transparent marine and chloride proxy.
These layers are interpreted as screening inputs. Local site inspection, customer field data and direct measurements remain valuable for final qualification.
Hourly climate basis
Temperature, dew point and surface pressure support humidity, absolute humidity, wetness and condensation calculations.
Atmospheric composition context
Marine aerosol, SO2, sulphate, NO2 and particulates support pollution and atmospheric aggressiveness screening.
Marine proxy
Distance to coastline provides an interpretable chloride and marine-influence guardrail, especially where aerosol model uncertainty is high.
Traceability
From climate data to engineering evidence.
Climetry reports should remain traceable: data source, reference period, spatial resolution, processing date, model version, input variables, assumptions and limitations are part of the methodology block.
Climate input
ERA5 hourly or hourly-derived climate data provides temperature, dew point and pressure fields. CAMS and coastline data add marine and pollution context.
Thermodynamic processing
Relative humidity, absolute humidity, dew-point spread and exposure-hour counts are calculated from consistent climate inputs.
CEY selection
Representative months are selected from long-term hourly distributions using weighted Finkelstein-Schafer statistics, inspired by ISO 15927-4 reference-year principles.
Environmental severity
Humidity, condensation, thermal load, marine influence and pollution are converted into Climetry-derived CE classes and transparent exposure indicators.
Material indicators
Steel and aluminum corrosivity are reported as ISO-derived material indicators, not as CE classes.
Engineering outputs
Point reports, city pages, map overlays and regional climate envelopes translate the metrics into qualification and durability guidance.
Representative exposure metrics, not event prediction.
Climetry uses ERA5 because it is one of the world's most widely validated atmospheric reanalysis datasets. Numerous independent studies have demonstrated good agreement for long-term temperature and humidity statistics, while local deviations mainly occur in complex terrain and during extreme weather events. Climetry therefore derives representative long-term environmental exposure metrics instead of predicting individual weather events.
Known limitations
Climetry characterizes long-term environmental exposure rather than local weather extremes. Like all reanalysis products, ERA5 may show reduced accuracy in complex terrain, dense urban canyons, or during rapidly evolving local weather events. For engineering qualification, however, long-term exposure statistics are typically more relevant than individual weather events. Climetry therefore derives representative climate exposure metrics from multi-year datasets and validates key variables against independent weather station observations.
Climetry Environmental Year
Representative hourly years for durability assessment.
The Climetry Environmental Year, or CEY, is the planned customer-facing hourly baseline. It follows the reference-year logic used in ISO 15927-4, but adapts the variable set and weighting toward humidity, condensation, wetness and corrosion-relevant exposure.
CEY is not a monthly average. It is assembled from real representative hourly months so engineering users can still calculate threshold hours, histograms, cycles and exposure sequences.
Monthly empirical distributions
For each calendar month, Climetry builds empirical cumulative distributions from multi-year hourly values.
Finkelstein-Schafer statistics
Each candidate month is compared with the long-term monthly distribution for temperature, RH, dew point, RH80 exposure, time of wetness and condensation potential.
Weighted environmental score
Durability-relevant variables receive explicit weights so moisture and wetness exposure can matter as much as temperature.
Representative month selection
The lowest-scoring candidate month is selected for each calendar month, with selected source years retained for traceability.
8760-hour CEY assembly
The selected hourly months are concatenated into a representative Climetry Environmental Year.
Long-term validation
The CEY is compared against the long-term climatology using exposure statistics, percentiles and distribution-distance checks.
Free vs professional
Preview thermodynamics, unlock exposure interpretation.
The free preview is intentionally limited to basic thermodynamic variables. It helps visitors understand the data basis without exposing the full exposure model.
Professional analysis adds CEY time series, exposure-hour statistics, monthly profiles, condensation and corrosivity indicators, CE class, engineering interpretation and PDF reporting.
Climate Preview
Mean temperature, relative humidity, dew point, absolute humidity and surface pressure.
Exposure Assessment
RH80/RH90, condensation potential, time of wetness, ISO-derived corrosivity indicators and CE class.
Qualification support
Extended interpretation, comparison, design recommendations, material considerations and qualification notes.
Why not Köppen-Geiger?
Products do not age according to vegetation zones.
The Köppen-Geiger climate classification is one of the world's most widely used climate classification systems. It was originally developed to describe global vegetation patterns and long-term climatic conditions.
While extremely valuable for geography, ecology and climate science, these climate zones are not specifically designed to characterize environmental conditions relevant to product durability, corrosion, condensation or material degradation.
Products do not fail according to vegetation zones.
Environmental exposure mechanisms such as humidity, condensation and marine influence often provide a more relevant description of product environments than traditional climate classifications.
Useful climate regions
Köppen-Geiger classes primarily describe annual temperature patterns, seasonal precipitation, vegetation suitability and climatic seasonality.
Different engineering stressors
An electronic control unit, battery system or outdoor inverter responds to prolonged high humidity, condensation events, elevated dew points, marine exposure, temperature cycling and corrosion potential.
Exposure-based classification
Climetry classes characterize environmental conditions relevant to humidity exposure, condensation potential, corrosion risk, thermal stress and marine influence.
Complementary classification systems
Köppen-Geiger and Climetry answer different questions.
Similar climate zones can produce different environmental exposure. Coastal Houston and inland subtropical regions may share the same climate classification while experiencing very different humidity exposure and condensation behavior. Tropical coastal and tropical inland environments may have similar annual temperatures but significantly different corrosion conditions.
Climetry environmental exposure classes are not intended to replace meteorological climate classifications. The objective is to support engineering decisions rather than ecological classification.
| Köppen-Geiger | Climetry |
|---|---|
| Vegetation and ecosystems | Product exposure |
| Temperature and precipitation | Humidity and environmental stress |
| Ecological classification | Engineering classification |
| Climate regions | Exposure severity |
| Meteorology | Product durability |
What type of climate exists here?
Examples include Cfa, BWh and Af.These classifications are highly useful for describing ecosystems, but they do not directly quantify environmental exposure mechanisms affecting technical products.
What exposure does a product experience here?
Climetry Exposure Classes summarize environmental severity.CE1-CE5 are derived from temperature, relative humidity, dew point, wetness conditions, marine influence and atmospheric modifiers.
CE classes are not ISO corrosivity classes.
CE classes describe overall environmental severity and are not equivalent to ISO corrosivity classes. They are Climetry-derived indicators that combine humidity, condensation, marine influence, pollution and thermal context for qualification relevance.
ISO-derived indicators are material-related atmospheric corrosivity estimates for steel and aluminum. High humidity and condensation exposure may result in a severe Climetry Exposure Class even if atmospheric metal corrosivity remains moderate.
CE classes indicate environmental severity and qualification relevance, not failure probability.
Calibration and validation
Reference sites make the screening model more honest.
Climetry calibration work uses EFC exposure sites, EPA SO2 reference data and measured chloride or pollution observations where available. These references are used to compare model outputs against real environmental measurements and to improve regional modifiers.
Future validation work will expand the reference-site database, separate background from local industrial pollution, and document uncertainty ranges for marine and pollution indicators.
Exposure reference sites
European exposure-site measurements help calibrate chloride and atmospheric corrosion context.
US SO2 monitor data
Measured annual SO2 monitors support a regional USA pollution reference layer.
Validation roadmap
More reference sites, station metadata, industrial context and uncertainty reporting will improve interpretability.
Screening first, qualification support second.
Climetry exposure classes and percentiles are comparative engineering indicators. They identify environments associated with increased moisture, condensation, corrosion, heat, freeze or pollution stress. They do not claim product failure probability unless customer-specific field failure data is integrated later.
Frequently asked questions
What is a Climetry Exposure Class?
A Climetry Exposure Class is a location-based environmental severity category from CE-1 to CE-5. It summarizes humidity, condensation, marine influence, pollution and thermal context for durability screening.
Is CE-5 the same as ISO C5?
No. CE classes describe overall environmental severity and are not equivalent to ISO 9223 corrosivity categories. ISO C classes describe material-related atmospheric corrosivity.
Does Climetry predict failure probability?
No. Climetry provides environmental severity indicators and qualification support. It does not predict product failure probability unless customer-specific field failure data is added later.
What is RH80 exposure?
RH80 exposure is the number of hours where relative humidity is at least 80%. It is used to identify persistent high-humidity loading that can affect corrosion, electronics and enclosure durability.
Why is raw climate data not enough?
Raw climate data is difficult to use directly in design reviews. Climetry translates hourly climate data into exposure hours, percentiles, classes, reports and engineering interpretation.
What is the difference between TMY and CEY?
TMY is usually optimized for building and energy simulation. CEY uses the representative-year idea but weights environmental durability variables such as humidity, wetness, dew point, condensation potential and exposure thresholds.
Why can a high humidity location have moderate metal corrosivity?
Atmospheric corrosivity depends on material, wetness, temperature, chloride and pollution. A location can have severe overall environmental exposure because of humidity or condensation even when a specific ISO-derived metal corrosivity indicator is moderate.
What data does the free preview show?
The free preview shows basic thermodynamic climate variables such as mean temperature, relative humidity, dew point, absolute humidity and surface pressure.
What does the professional report unlock?
Professional analysis unlocks monthly profiles, CEY-derived exposure hours, RH80/RH90, condensation potential, ISO-derived corrosivity indicators, CE class, engineering interpretation and PDF reporting.