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Castries vs Atlanta
Comparing Castries change · Atlanta change
Castries is the warmer of the two — about 10°C on the annual average; Castries is the wetter, with 681 mm more rain a year, and Castries the sunnier.
How the seasons compare
The differences between Castries and Atlanta, in everyday terms.
Summers
Atlanta has hotter summers
Castries: Warm
Atlanta: Hot
Winters
Castries has far milder winters
Castries: Stays warm
Atlanta: Chilly
Rain & snow
Castries is wetter
Castries: Very wet
Atlanta: Wet
Sky
Castries is sunnier
Castries: Fairly sunny
Atlanta: Partly cloudy
Month-by-month charts
Temperature
Castries is the warmer of the two — about 10°C on the annual average.
Precipitation
Castries is the wetter — about 681 mm 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 (°C) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Castries | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 28 | 27 |
| Atlanta | 12 | 15 | 19 | 23 | 27 | 31 | 32 | 32 | 29 | 24 | 18 | 13 |
| Difference | -15 | -12 | -8 | -4 | -1 | +2 | +4 | +3 | — | -5 | -10 | -14 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 27 | 27 | 27 | 28 | 28 | 28 |
| Atlanta | 12 | 15 | 19 | 23 | 27 | 31 |
| Difference | -15 | -12 | -8 | -4 | -1 | +2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 28 | 29 | 29 | 29 | 28 | 27 |
| Atlanta | 32 | 32 | 29 | 24 | 18 | 13 |
| Difference | +4 | +3 | — | -5 | -10 | -14 |
Avg low (°C) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Castries | 26 | 25 | 25 | 26 | 27 | 27 | 27 | 28 | 28 | 28 | 27 | 26 |
| Atlanta | 2 | 4 | 7 | 11 | 16 | 20 | 22 | 22 | 19 | 13 | 7 | 4 |
| Difference | -24 | -21 | -18 | -15 | -11 | -7 | -5 | -6 | -9 | -15 | -20 | -23 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 26 | 25 | 25 | 26 | 27 | 27 |
| Atlanta | 2 | 4 | 7 | 11 | 16 | 20 |
| Difference | -24 | -21 | -18 | -15 | -11 | -7 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 27 | 28 | 28 | 28 | 27 | 26 |
| Atlanta | 22 | 22 | 19 | 13 | 7 | 4 |
| Difference | -5 | -6 | -9 | -15 | -20 | -23 |
Precipitation (mm) Varies through the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Castries | 113 | 76 | 66 | 90 | 114 | 134 | 216 | 291 | 224 | 246 | 243 | 149 |
| Atlanta | 117 | 116 | 119 | 97 | 90 | 115 | 121 | 109 | 97 | 83 | 101 | 116 |
| Difference | +3 | +40 | +53 | +7 | -23 | -18 | -96 | -182 | -127 | -163 | -141 | -33 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 113 | 76 | 66 | 90 | 114 | 134 |
| Atlanta | 117 | 116 | 119 | 97 | 90 | 115 |
| Difference | +3 | +40 | +53 | +7 | -23 | -18 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 216 | 291 | 224 | 246 | 243 | 149 |
| Atlanta | 121 | 109 | 97 | 83 | 101 | 116 |
| Difference | -96 | -182 | -127 | -163 | -141 | -33 |
Snowfall (cm)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Castries | — | — | — | — | — | — | — | — | — | — | — | — |
| Atlanta | 3 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| Difference | — | — | — | — | — | — | — | — | — | — | — | — |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | — | — | — | — | — | — |
| Atlanta | 3 | 1 | 1 | 0 | 0 | 0 |
| Difference | — | — | — | — | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | — | — | — | — | — | — |
| Atlanta | 0 | 0 | 0 | 0 | 0 | 1 |
| Difference | — | — | — | — | — | — |
Cloud cover (%) Atlanta 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 |
| Atlanta | 58 | 61 | 58 | 53 | 53 | 57 | 57 | 55 | 49 | 44 | 49 | 59 |
| Difference | +19 | +22 | +16 | +4 | +1 | -1 | +7 | +9 | -2 | -7 | +3 | +18 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 38 | 39 | 42 | 49 | 52 | 59 |
| Atlanta | 58 | 61 | 58 | 53 | 53 | 57 |
| Difference | +19 | +22 | +16 | +4 | +1 | -1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 50 | 46 | 51 | 51 | 46 | 41 |
| Atlanta | 57 | 55 | 49 | 44 | 49 | 59 |
| Difference | +7 | +9 | -2 | -7 | +3 | +18 |
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 |
| Atlanta | 83 | 83 | 81 | 78 | 75 | 73 | 70 | 70 | 71 | 72 | 76 | 82 |
| Difference | +7 | +8 | +6 | +2 | -2 | -6 | -8 | -9 | -8 | -7 | -3 | +6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 76 | 75 | 75 | 76 | 77 | 79 |
| Atlanta | 83 | 83 | 81 | 78 | 75 | 73 |
| Difference | +7 | +8 | +6 | +2 | -2 | -6 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 79 | 79 | 79 | 79 | 79 | 77 |
| Atlanta | 70 | 70 | 71 | 72 | 76 | 82 |
| Difference | -8 | -9 | -8 | -7 | -3 | +6 |
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 → · Atlanta 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.
Atlanta
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Atlanta Hartsfield-jackson Int (NOAA GHCN station USW00013874), about 14 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 Atlanta → · Castries page · Atlanta page