Singapore is a severe humid tropical reference location for moisture-sensitive products, outdoor electronics and corrosion-relevant qualification.
Corrosion is the primary stressor. Humidity 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.
Singapore represents one of the world's most severe environments for moisture-sensitive products.
The climate has limited seasonal relief: high humidity, high dew points and warm temperatures persist through the year, reducing drying potential for enclosures and electronics.
For global products, Singapore is a useful severe-screening location because it combines tropical moisture stress with coastal and urban atmospheric context.
Climetry-derived indicators summarize environmental severity. ISO-derived indicators estimate material-related atmospheric corrosivity for metals such as carbon steel, zinc, copper and aluminum.
Persistent humidity with coastal corrosion relevance.
Marine humidity is the dominant durability stressor.
Frequent near-saturation conditions, especially overnight.
CEY10 hourly representative-year hours above the common wetness threshold.
CEY10 high-humidity extremes relevant for electronics and coatings.
Warm and moist climate with limited seasonal relief.
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.
Persistent high humidity with only small seasonal relief.
Stable tropical temperatures; heat is continuous rather than seasonal.
High moisture content year-round, relevant for enclosure drying potential.
Dew point remains close to air temperature, increasing moisture stress.
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.
The Singapore CEY remains tightly tropical, with most exposure hours in the mid-to-high 20s C. This supports warm-operation reliability screening rather than freeze or seasonal heating design.
Humidity exposure is concentrated in high RH bands. The result highlights persistent moisture load and limited natural drying potential for outdoor electronics and enclosures.
Warm temperature and high relative humidity occur together for a large share of the representative year. This paired exposure is more relevant for corrosion and electronics stress than either variable alone.
Absolute humidity stays high across the warm operating range, indicating a high moisture reservoir around exposed products and slow drying conditions after wetting.
The percentile bands show limited seasonal relief: even lower-percentile conditions remain warm and humid compared with temperate engineering baselines.
The selected high-risk week combines elevated humidity, high absolute humidity and small dew-point spread. It is useful for condensation and moisture-ingress screening.
Daily temperature cycling is low compared with continental locations, but the metric remains useful for enclosure breathing, gasket stress and thermomechanical reliability review.
Singapore's cold-week histogram remains tropical. Heating-load relevance is low here, while the same method becomes important for temperate and cold deployment regions.
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.
Monthly atmospheric composition is translated into transparent screening ratings for marine aerosol, pollution, chloride proxy, and regional sulfur-deposition context.
CAMS marine aerosol is moderate, while coastline distance still keeps chloride relevant.
Urban sulfate background, NO2, sulphate and PM proxies are strong modifiers.
ISO-style chloride input proxy blended from coastline guardrail and CAMS marine aerosol.
Annual wet+dry sulfate deposition background sampled from MERRA-2.
MERRA-2 sulfate describes regional deposition context. Live ISO-9223-style screening uses CAMS background SO2 Pc/Pd; local measurements should override either model.
Wet hours plus chloride proxy dominate the screening result.
Monthly mean values of marine aerosol, sulfur-deposition background, particulate pollution, combined pollution and chloride proxy indicators. Only the monthly means are shown, without a spread or range.
Marine aerosol is seasonal, with stronger values early in the year.
Fine particulate exposure is consistently elevated in the urban-regional context.
Combined pollution modifier remains severe for most months.
Chloride proxy stays in the S1 screening band due to coastal guardrail and CAMS marine aerosol.
MERRA-2 sulfate background is moderate for Singapore and adds sulfur-deposition context to the tropical marine exposure profile.
Singapore combines high tropical UV with moderate surface ozone. The partial plastic-ageing index stays high through the year because UV exposure has little seasonal relief.
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 polymer housings, cable jackets and outdoor elastomers, Singapore should be treated as a persistent photo-oxidation environment. Material selection should consider UV stabilizers, color stability and ozone-sensitive elastomer screening, while thermal and moisture ageing will be refined with CEY channels.
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 Singapore Changi Airport (WSSS): 12 monthly values per variable. Bias is ERA5 minus station.
Mean bias −0.45 °C
Mean bias −0.15 °C
Mean bias +0.87 %-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-5 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.