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Castries vs Chicago

Af Tropical rainforestDfa Hot-summer humid continental

Comparing Castries change · Chicago change

Bottom line

Castries is the warmer of the two — about 16°C on the annual average; Castries is the wetter, with 911 mm more rain a year, and Castries the sunnier.

Warmer Castries 16°C on the year
Wetter Castries 911 mm more a year
Sunnier Castries 16 pp less cloud
Colder winters Chicago 35°C colder nights

How the seasons compare

The differences between Castries and Chicago, in everyday terms.

Summers

Chicago has hotter summers

Castries: Warm
Chicago: Hot

Winters

Castries has far milder winters

Castries: Stays warm
Chicago: Very cold

Rain & snow

Castries is wetter

Castries: Very wet
Chicago: Wet

Sky

Castries is sunnier

Castries: Fairly sunny
Chicago: Often cloudy

Month-by-month charts

Temperature

Castries is the warmer of the two — about 16°C on the annual average.

-20°20°40° JanAprJulOct CastriesChicago

Precipitation

Castries is the wetter — about 911 mm more across the year.

PRECIPITATION (mm) 0150300 JanAprJulOct CastriesChicago

Clear skies

Castries has the clearer skies — the higher line.

0%25%50%75%100% JanAprJulOct CastriesChicago

Exact monthly numbers

Tap a metric to open its full table. Desktop shows all twelve months; on a phone each metric splits into Jan–Jun and Jul–Dec.

Avg high (°C) Castries runs higher most of the year
JanFebMarAprMayJunJulAugSepOctNovDec
Castries272727282828282929292827
Chicago13917232932302718103
Difference-26-24-18-11-5+1+3+2-2-10-18-24
Jan – JunJanFebMarAprMayJun
Castries272727282828
Chicago139172329
Difference-26-24-18-11-5+1
Jul – DecJulAugSepOctNovDec
Castries282929292827
Chicago32302718103
Difference+3+2-2-10-18-24
Avg low (°C) Castries runs higher most of the year
JanFebMarAprMayJunJulAugSepOctNovDec
Castries262525262727272828282726
Chicago-10-8-2410151817136-0-6
Difference-35-33-28-22-17-12-9-10-15-22-28-32
Jan – JunJanFebMarAprMayJun
Castries262525262727
Chicago-10-8-241015
Difference-35-33-28-22-17-12
Jul – DecJulAugSepOctNovDec
Castries272828282726
Chicago1817136-0-6
Difference-9-10-15-22-28-32
Precipitation (mm) Castries runs higher most of the year
JanFebMarAprMayJunJulAugSepOctNovDec
Castries113766690114134216291224246243149
Chicago58516410512611810411388936961
Difference-55-25-3+15+13-15-112-178-136-153-173-88
Jan – JunJanFebMarAprMayJun
Castries113766690114134
Chicago585164105126118
Difference-55-25-3+15+13-15
Jul – DecJulAugSepOctNovDec
Castries216291224246243149
Chicago10411388936961
Difference-112-178-136-153-173-88
Cloud cover (%) Chicago runs higher most of the year
JanFebMarAprMayJunJulAugSepOctNovDec
Castries383942495259504651514641
Chicago707069676659525150606770
Difference+31+32+27+18+14+3+5-1+8+21+30
Jan – JunJanFebMarAprMayJun
Castries383942495259
Chicago707069676659
Difference+31+32+27+18+14
Jul – DecJulAugSepOctNovDec
Castries504651514641
Chicago525150606770
Difference+3+5-1+8+21+30
Relative humidity (%) Varies through the year
JanFebMarAprMayJunJulAugSepOctNovDec
Castries767575767779797979797977
Chicago868379767677767472748086
Difference+11+9+4-1-1-2-3-5-6-5+1+9
Jan – JunJanFebMarAprMayJun
Castries767575767779
Chicago868379767677
Difference+11+9+4-1-1-2
Jul – DecJulAugSepOctNovDec
Castries797979797977
Chicago767472748086
Difference-3-5-6-5+1+9

How both climates are changing

Both cities are warming. Each city has its own warming trend; see its trends page for the year-by-year detail. Castries trends → · Chicago trends →

Both cities' Köppen climate types are projected to hold steady through 2099 (SSP2-4.5).

Methodology & sources

Castries

Temperature — modelled for this location from ERA5-Land reanalysis, a ~9 km global grid, because no long-record weather station is close enough to use.

Precipitation — 1991–2020 normals computed from 10 years of daily observations at LE Lamentin, a weather station, about 66 km from the city centre. The underlying daily records come from NOAA's global station network.

Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.

Chicago

Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Little Red School House (NOAA GHCN station USC00115110), about 25 km from the city centre.

Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.

How we build these numbers →