Houston represents a humid Gulf Coast environment where moisture, heat and industrial coastal context can affect field reliability.
Humidity is the primary stressor. Heat and industrial coast is the secondary driver for reliability and field durability decisions.
CE classes describe overall environmental severity and are not equivalent to ISO corrosivity classes.
A normalized 0-100 matrix showing which exposure mechanisms dominate the deployment environment. Scores describe environmental load intensity, not failure probability.
Gulf Coast humidity creates long periods of elevated moisture exposure that can affect electronics, battery systems and outdoor equipment.
The combination of warm temperatures, high dew points and regional industrial context makes Houston a practical stress case for infrastructure operators and product durability teams.
For qualification planning, Houston is useful because it is not purely tropical, but it can still create severe humidity-led exposure for outdoor assets.
Humidity hours (CEY10, 2015-2024), chloride and sulfate deposition (modelled annual means) and absolute humidity are different quantities. They are listed side by side, not combined into one scale. ERA5 agreement with the Houston Intercontinental station is shown in the validation section below.
Climetry-derived indicators summarize environmental severity. ISO-derived indicators estimate material-related atmospheric corrosivity for metals such as carbon steel, zinc, copper and aluminum.
High moisture load with heat and coastal-industrial context.
Humidity and Gulf Coast influence increase exposure severity.
Moist overnight and seasonal transitions matter.
CEY10 long annual wet-hour exposure window.
CEY10 frequent high-humidity stress periods.
Warm, moist, and seasonally storm-influenced.
Monthly mean values of the core thermodynamic variables. Only the monthly means are shown, without a spread or range.
The source and period of these monthly means are not documented on this page yet; they are not presented as CEY10 output.
High humidity persists across seasons, with warm-season moisture stress.
Summer heat combines with humidity for enclosure and electronics stress.
Absolute humidity is high during the long warm season.
Dew point rises strongly in summer, increasing condensation relevance.
These figures are calculated from the local hourly Climetry Environmental Year and translate thermodynamic climate data into engineering-readable duration, cycle and moisture-risk views.
Houston's 1 C temperature-duration histogram is calculated from the selected hourly CEY10 source months. It shows how long products experience each outdoor temperature band during the representative year.
The RH duration histogram translates relative humidity into annual exposure hours. It supports moisture-sensitive electronics, coating, connector and enclosure screening.
The joint duration heatmap shows which temperature and humidity combinations occur together. This is more useful for durability screening than separate annual averages.
The psychrometric density view connects dry-bulb temperature with absolute humidity and helps identify moisture-rich operating conditions and drying limitations.
The percentile profile summarizes the representative spread of temperature, dew point, relative humidity, absolute humidity and dew-point margin.
The selected high-risk week highlights periods with elevated humidity, absolute humidity and small dew-point spread. It is a screening view for condensation and moisture-ingress relevance.
Daily temperature-cycle statistics provide engineering input for thermomechanical reliability assessments, enclosure breathing and gasket stress screening.
The cold-week temperature histogram is useful for heating-load screening in temperate and cold climates. In tropical climates it confirms low heating-design relevance.
CE classes summarize humidity, condensation potential, marine influence, pollution context and thermal exposure. They are not ISO 9223 corrosivity classes.
It is useful for identifying persistent moisture exposure relevant to electronics, coatings, connectors, enclosures and atmospheric corrosion screening.
It is derived from temperature, dew point and humidity context. It is a screening indicator, not a measurement on a specific product surface.
Houston chloride is sampled from the current Climetry North America V2 land-only total chloride overlay. ISO-9223-style screening uses CAMS background SO2 Pc/Pd; it does not resolve local plumes. MERRA-2 sulfate is reported separately as regional atmospheric context.
Annual mean sampled at Houston from the current North America V2 land-only total chloride overlay.
North America V2 combines NADP-calibrated marine wet deposition, dry-deposition uplift and a coastal aerosol tail. The current open-fetch logic keeps Houston in the low-S1 Gulf Coast corridor range.
Houston is close enough to the Gulf Coast corridor for marine chloride screening to remain relevant.
Annual wet+dry sulfate deposition background sampled from MERRA-2. Use as regional sulfur-deposition context, not SO2 gas concentration.
MERRA-2 sulfate shows useful regional wet-deposition agreement in the USA, but is not the ISO Pd input. Live screening uses CAMS background SO2 Pc/Pd.
Approximate screening inputs: time of wetness, V2 total chloride and CAMS-derived SO2 Pd. MERRA-2 sulfate remains separate context.
Humidity remains the primary driver; sulfur input uses CAMS background Pc/Pd and does not resolve local plumes.
Chloride-sensitive interpretation should use the V2 total chloride value and local site context.
For Houston, wet hours, Gulf Coast aerosol influence, and CAMS background SO2 jointly define the screening context.
Monthly chloride values are sampled from the current North America V2 total chloride overlay at the Houston grid cell. Sulfate values are sampled from MERRA-2 2020-2024 monthly wet+dry deposition background.
Monthly V2 total chloride estimates remain in the low S1 screening range at the sampled inland Houston grid cell. The value is visible as Gulf Coast transport context without treating Houston as an exposed surf-zone site.
MERRA-2 sulfate background is moderate for Houston and provides independent regional deposition context; it is not the ISO Pd input.
Houston has a strong warm-season UV signal and moderate ozone. Plastic ageing exposure is high in summer and remains meaningful outside the peak season.
ERA5 2015-2024 monthly climatology sampled at the city grid cell.
Highest monthly mean daily UV dose in the representative climatology.
CAMS EAC4 surface ozone climatology for elastomer and rubber ageing context.
Partial Climetry v0.1 screening index from UV and ozone only; not a lifetime prediction.
For Gulf Coast products, polymer ageing should be evaluated together with humidity and corrosion exposure. UV alone is not the full story; moisture, heat and ozone-sensitive elastomers can act in parallel.
Monthly profiles show UV surface dose, surface ozone and a partial Plastic Ageing Exposure Index. Thermal oxidation, hydrolysis and moisture ageing will be refined with CEY thermodynamic channels.
Mean daily UV surface dose by calendar month. Useful for photo-oxidation screening of plastics, coatings, cable jackets and exposed polymer housings.
Monthly surface ozone climatology. Relevant for ozone-sensitive elastomers, seals, rubber parts and strained polymer components.
Partial Climetry Plastic Ageing Exposure Index v0.1 from UV and ozone channels only. Thermal and moisture ageing channels will be added from CEY.
Exposure hours (RH80/RH90) and the hourly CEY engineering figures (duration, histogram and percentile diagrams) on this page come from the CEY10 representative year: real months selected from ERA5-Land 2015-2024 at one 0.25° grid cell. The monthly profile charts state their own data basis above them.
The station comparison below is a separate 2025 pilot. It compares monthly values of ERA5, the global reanalysis rather than ERA5-Land, at the nearest grid point with Meteostat airport observations: 12 monthly values per station. It does not validate the representative year, its exposure hours, CE classes or corrosion screening.
For some coastal cities, including Dubai, Mumbai, Seattle and Singapore, the representative-year exposure hours lie outside the annual range observed at the airport station. Broader station comparisons of ERA5-Land and CEY10 are described on the scientific validation page.
ERA5 (the global reanalysis, nearest grid point) monthly means for 2025 compared with Meteostat observations at Houston Intercontinental (KIAH): 12 monthly values per variable. Bias is ERA5 minus station.
Mean bias −0.89 °C
Mean bias +0.40 °C
Mean bias +4.84 %-points
The full report combines climate classification, corrosion screening, condensation exposure, RH80/RH90 hours, marine context, monthly profiles, and reliability implications.
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.
Analyze any location worldwide and compare humidity, condensation and environmental severity.
CE-4 is a Climetry Exposure Class. It describes overall environmental severity for durability screening and qualification support at this location.
No. The page provides environmental exposure screening. Corrosion indicators are engineering screening outputs, not failure probability and not a product-specific lifetime prediction.
Exposure hours and the hourly CEY engineering figures (duration, histogram and percentile diagrams) come from the CEY10 representative year: real months selected from ERA5-Land 2015-2024 at one 0.25° grid cell. A separate 2025 pilot compared ERA5 monthly values with airport observations (12 monthly values per station); it does not validate the representative year or its exposure hours. For some coastal cities the representative-year exposure hours lie outside the range observed at the airport. The monthly profile charts state their own data basis above them. Treat the values as screening values.
CE classes describe overall environmental severity. ISO 9223 corrosivity classes describe material-related atmospheric corrosivity categories. They are related but not equivalent.
Temperature, dew point and pressure from ERA5-Land, assembled into the CEY10 representative year (2015-2024), are used to derive relative humidity, absolute humidity and exposure hours. Other layers name their own source and period where they are shown.