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Castries vs Saint Petersburg
Comparing Castries change · Saint Petersburg change
Castries is the warmer of the two — about 38°F on the annual average; Castries is the wetter, with 51 in more rain a year, and Castries the sunnier.
How the seasons compare
The differences between Castries and Saint Petersburg, in everyday terms.
Summers
Castries has much hotter summers
Castries: Warm
Saint Petersburg: Mild
Winters
Castries has far milder winters
Castries: Stays warm
Saint Petersburg: Very cold
Rain & snow
Castries is much wetter
Castries: Very wet
Saint Petersburg: Moderate rainfall
Sky
Castries is far sunnier
Castries: Fairly sunny
Saint Petersburg: Often cloudy
Month-by-month charts
Temperature
Castries is the warmer of the two — about 38°F on the annual average.
Precipitation
Castries is the wetter — about 51 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 |
| Saint Petersburg | 27 | 27 | 36 | 49 | 61 | 69 | 74 | 71 | 60 | 47 | 37 | 31 |
| Difference | -53 | -53 | -44 | -32 | -21 | -14 | -9 | -13 | -24 | -36 | -46 | -51 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 80 | 80 | 80 | 82 | 83 | 83 |
| Saint Petersburg | 27 | 27 | 36 | 49 | 61 | 69 |
| Difference | -53 | -53 | -44 | -32 | -21 | -14 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 83 | 84 | 84 | 83 | 83 | 81 |
| Saint Petersburg | 74 | 71 | 60 | 47 | 37 | 31 |
| Difference | -9 | -13 | -24 | -36 | -46 | -51 |
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 |
| Saint Petersburg | 19 | 18 | 25 | 35 | 45 | 54 | 60 | 57 | 49 | 39 | 30 | 23 |
| Difference | -59 | -60 | -53 | -44 | -35 | -27 | -21 | -25 | -33 | -42 | -51 | -56 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 78 | 77 | 78 | 79 | 80 | 81 |
| Saint Petersburg | 19 | 18 | 25 | 35 | 45 | 54 |
| Difference | -59 | -60 | -53 | -44 | -35 | -27 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 81 | 82 | 82 | 82 | 81 | 79 |
| Saint Petersburg | 60 | 57 | 49 | 39 | 30 | 23 |
| Difference | -21 | -25 | -33 | -42 | -51 | -56 |
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 |
| Saint Petersburg | 1.8 | 1.4 | 1.4 | 1.5 | 1.8 | 2.7 | 3.3 | 3.4 | 2.3 | 2.5 | 2.2 | 2 |
| Difference | -2.6 | -1.6 | -1.2 | -2.1 | -2.6 | -2.5 | -5.2 | -8.1 | -6.6 | -7.2 | -7.3 | -3.9 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 4.5 | 3 | 2.6 | 3.5 | 4.5 | 5.3 |
| Saint Petersburg | 1.8 | 1.4 | 1.4 | 1.5 | 1.8 | 2.7 |
| Difference | -2.6 | -1.6 | -1.2 | -2.1 | -2.6 | -2.5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 8.5 | 11.5 | 8.8 | 9.7 | 9.6 | 5.9 |
| Saint Petersburg | 3.3 | 3.4 | 2.3 | 2.5 | 2.2 | 2 |
| Difference | -5.2 | -8.1 | -6.6 | -7.2 | -7.3 | -3.9 |
Cloud cover (%) Saint Petersburg 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 |
| Saint Petersburg | 75 | 72 | 65 | 66 | 63 | 65 | 64 | 63 | 70 | 76 | 76 | 78 |
| Difference | +36 | +33 | +24 | +17 | +11 | +6 | +14 | +16 | +19 | +24 | +30 | +38 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 38 | 39 | 42 | 49 | 52 | 59 |
| Saint Petersburg | 75 | 72 | 65 | 66 | 63 | 65 |
| Difference | +36 | +33 | +24 | +17 | +11 | +6 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 50 | 46 | 51 | 51 | 46 | 41 |
| Saint Petersburg | 64 | 63 | 70 | 76 | 76 | 78 |
| Difference | +14 | +16 | +19 | +24 | +30 | +38 |
Relative humidity (%) Saint Petersburg runs higher most of 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 |
| Saint Petersburg | 97 | 97 | 93 | 85 | 78 | 79 | 81 | 82 | 86 | 91 | 95 | 97 |
| Difference | +22 | +23 | +19 | +8 | +1 | +1 | +2 | +3 | +7 | +12 | +16 | +20 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 76 | 75 | 75 | 76 | 77 | 79 |
| Saint Petersburg | 97 | 97 | 93 | 85 | 78 | 79 |
| Difference | +22 | +23 | +19 | +8 | +1 | +1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 79 | 79 | 79 | 79 | 79 | 77 |
| Saint Petersburg | 81 | 82 | 86 | 91 | 95 | 97 |
| Difference | +2 | +3 | +7 | +12 | +16 | +20 |
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 → · Saint Petersburg 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.
Saint Petersburg
Temperature & precipitation — 1991–2020 normals computed from 29 years of daily observations at St. Petersburg, a weather station, about 3 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.
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