Mumbai is a severe coastal tropical environment where monsoon humidity and marine aerosols create persistent environmental stress.
Marine corrosion is the primary stressor. Monsoon 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.
Monsoon humidity and marine aerosols create persistent environmental stress for products and infrastructure deployed in Mumbai.
High dew points, warm temperatures and coastal exposure can keep surfaces and enclosures in moisture-relevant conditions for long periods.
Mumbai is a strong screening case for corrosion-sensitive hardware, telecom infrastructure, solar/BESS equipment and outdoor electronics used in tropical coastal markets.
Climetry-derived indicators summarize environmental severity. ISO-derived indicators estimate material-related atmospheric corrosivity for metals such as carbon steel, zinc, copper and aluminum.
Marine humidity and monsoon exposure dominate.
Coastal chloride proxy and wet hours are both high.
Long periods near saturation during humid seasons.
CEY10 very long corrosion-relevant exposure duration.
CEY10 extreme humidity is a recurring environmental load.
High moisture, high marine influence, warm temperatures.
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.
Monsoon season drives very high RH and long wet-hour exposure.
Warm temperatures persist; pre-monsoon heat adds thermal stress.
Moisture content becomes severe during monsoon months.
High dew points indicate strong condensation and corrosion 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.
Mumbai'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.
Monthly atmospheric composition is translated into transparent screening ratings for marine aerosol, pollution, chloride proxy, and regional sulfur-deposition context.
Annual CAMS marine score is moderate, with severe monsoon-season peaks.
Urban aerosol and regional sulphur context add strongly to wet-hour corrosion exposure.
ISO-style chloride input proxy is elevated and seasonally reinforced.
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 urban or industrial plumes may differ strongly.
Humidity, chloride, and pollution combine into severe exposure.
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 becomes severe during monsoon-influenced months.
PM2.5 is severe outside the wettest months and contributes to pollution context.
Combined pollution modifier is severe for much of the year.
Chloride proxy rises in monsoon months, reinforcing marine corrosion screening.
MERRA-2 sulfate background is elevated for Mumbai, with a strong monsoon-season signal in the sampled grid cell.
Mumbai has high pre-monsoon UV and elevated ozone before the wettest season. Monsoon cloud cover reduces UV, but the annual exposure remains high.
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 plastics and elastomers, Mumbai should be treated as a combined tropical coastal ageing environment: UV, ozone, humidity, heat and marine contamination all need to be considered before material qualification.
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 Mumbai Santacruz Airport (VABB): 12 monthly values per variable. Bias is ERA5 minus station.
Mean bias −1.25 °C
Mean bias +1.86 °C
Mean bias +10.56 %-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.