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Castries vs Chicago
Comparing Castries change · Chicago change
Castries is the warmer of the two — about 30°F on the annual average; Castries is the wetter, with 36 in more rain a year, and Castries the sunnier.
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 30°F on the annual average.
Precipitation
Castries is the wetter — about 36 in more across the year.
Clear skies
Castries has the clearer skies — the higher line.
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 (°F) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Castries | 80 | 80 | 80 | 82 | 83 | 83 | 83 | 84 | 84 | 83 | 83 | 81 |
| Chicago | 33 | 37 | 49 | 62 | 73 | 84 | 90 | 87 | 80 | 65 | 50 | 38 |
| Difference | -47 | -43 | -32 | -20 | -9 | +1 | +6 | +3 | -4 | -18 | -33 | -43 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 80 | 80 | 80 | 82 | 83 | 83 |
| Chicago | 33 | 37 | 49 | 62 | 73 | 84 |
| Difference | -47 | -43 | -32 | -20 | -9 | +1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 83 | 84 | 84 | 83 | 83 | 81 |
| Chicago | 90 | 87 | 80 | 65 | 50 | 38 |
| Difference | +6 | +3 | -4 | -18 | -33 | -43 |
Avg low (°F) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Castries | 78 | 77 | 78 | 79 | 80 | 81 | 81 | 82 | 82 | 82 | 81 | 79 |
| Chicago | 15 | 18 | 28 | 39 | 50 | 60 | 64 | 63 | 55 | 43 | 31 | 21 |
| Difference | -63 | -60 | -50 | -40 | -31 | -21 | -17 | -18 | -27 | -39 | -50 | -58 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 78 | 77 | 78 | 79 | 80 | 81 |
| Chicago | 15 | 18 | 28 | 39 | 50 | 60 |
| Difference | -63 | -60 | -50 | -40 | -31 | -21 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 81 | 82 | 82 | 82 | 81 | 79 |
| Chicago | 64 | 63 | 55 | 43 | 31 | 21 |
| Difference | -17 | -18 | -27 | -39 | -50 | -58 |
Precipitation (in) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Castries | 4.5 | 3 | 2.6 | 3.5 | 4.5 | 5.3 | 8.5 | 11.5 | 8.8 | 9.7 | 9.6 | 5.9 |
| Chicago | 2.3 | 2 | 2.5 | 4.1 | 5 | 4.7 | 4.1 | 4.5 | 3.5 | 3.7 | 2.7 | 2.4 |
| Difference | -2.2 | -1 | -0.1 | +0.6 | +0.5 | -0.6 | -4.4 | -7 | -5.4 | -6 | -6.8 | -3.5 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 4.5 | 3 | 2.6 | 3.5 | 4.5 | 5.3 |
| Chicago | 2.3 | 2 | 2.5 | 4.1 | 5 | 4.7 |
| Difference | -2.2 | -1 | -0.1 | +0.6 | +0.5 | -0.6 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 8.5 | 11.5 | 8.8 | 9.7 | 9.6 | 5.9 |
| Chicago | 4.1 | 4.5 | 3.5 | 3.7 | 2.7 | 2.4 |
| Difference | -4.4 | -7 | -5.4 | -6 | -6.8 | -3.5 |
Cloud cover (%) Chicago runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Castries | 38 | 39 | 42 | 49 | 52 | 59 | 50 | 46 | 51 | 51 | 46 | 41 |
| Chicago | 70 | 70 | 69 | 67 | 66 | 59 | 52 | 51 | 50 | 60 | 67 | 70 |
| Difference | +31 | +32 | +27 | +18 | +14 | — | +3 | +5 | -1 | +8 | +21 | +30 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 38 | 39 | 42 | 49 | 52 | 59 |
| Chicago | 70 | 70 | 69 | 67 | 66 | 59 |
| Difference | +31 | +32 | +27 | +18 | +14 | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 50 | 46 | 51 | 51 | 46 | 41 |
| Chicago | 52 | 51 | 50 | 60 | 67 | 70 |
| Difference | +3 | +5 | -1 | +8 | +21 | +30 |
Relative humidity (%) Varies through the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Castries | 76 | 75 | 75 | 76 | 77 | 79 | 79 | 79 | 79 | 79 | 79 | 77 |
| Chicago | 86 | 83 | 79 | 76 | 76 | 77 | 76 | 74 | 72 | 74 | 80 | 86 |
| Difference | +11 | +9 | +4 | -1 | -1 | -2 | -3 | -5 | -6 | -5 | +1 | +9 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 76 | 75 | 75 | 76 | 77 | 79 |
| Chicago | 86 | 83 | 79 | 76 | 76 | 77 |
| Difference | +11 | +9 | +4 | -1 | -1 | -2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 79 | 79 | 79 | 79 | 79 | 77 |
| Chicago | 76 | 74 | 72 | 74 | 80 | 86 |
| 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.
← change Castries · change Chicago → · Castries page · Chicago page