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Castries vs Houston
Comparing Castries change · Houston change
Castries is the warmer of the two — about 6°C on the annual average; Castries is the wetter, with 433 mm more rain a year, and Castries the sunnier.
How the seasons compare
The differences between Castries and Houston, in everyday terms.
Summers
Houston has much hotter summers
Castries: Warm
Houston: Hot
Winters
Castries has far milder winters
Castries: Stays warm
Houston: Cool
Rain & snow
Castries is wetter
Castries: Very wet
Houston: Very wet
Sky
Castries is sunnier
Castries: Fairly sunny
Houston: Partly cloudy
Month-by-month charts
Temperature
Castries is the warmer of the two — about 6°C on the annual average.
Precipitation
Castries is the wetter — about 433 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) Varies through 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 |
| Houston | 18 | 20 | 23 | 26 | 29 | 32 | 33 | 34 | 31 | 28 | 23 | 19 |
| Difference | -9 | -7 | -4 | -2 | +1 | +4 | +5 | +5 | +2 | -1 | -6 | -9 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 27 | 27 | 27 | 28 | 28 | 28 |
| Houston | 18 | 20 | 23 | 26 | 29 | 32 |
| Difference | -9 | -7 | -4 | -2 | +1 | +4 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 28 | 29 | 29 | 29 | 28 | 27 |
| Houston | 33 | 34 | 31 | 28 | 23 | 19 |
| Difference | +5 | +5 | +2 | -1 | -6 | -9 |
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 |
| Houston | 8 | 10 | 13 | 16 | 21 | 24 | 24 | 24 | 22 | 17 | 12 | 9 |
| Difference | -18 | -15 | -12 | -10 | -6 | -3 | -3 | -3 | -6 | -11 | -15 | -18 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 26 | 25 | 25 | 26 | 27 | 27 |
| Houston | 8 | 10 | 13 | 16 | 21 | 24 |
| Difference | -18 | -15 | -12 | -10 | -6 | -3 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 27 | 28 | 28 | 28 | 27 | 26 |
| Houston | 24 | 24 | 22 | 17 | 12 | 9 |
| Difference | -3 | -3 | -6 | -11 | -15 | -18 |
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 |
| Houston | 122 | 77 | 84 | 107 | 130 | 166 | 111 | 169 | 186 | 147 | 115 | 115 |
| Difference | +9 | +1 | +18 | +18 | +16 | +33 | -105 | -123 | -38 | -99 | -127 | -34 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 113 | 76 | 66 | 90 | 114 | 134 |
| Houston | 122 | 77 | 84 | 107 | 130 | 166 |
| Difference | +9 | +1 | +18 | +18 | +16 | +33 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 216 | 291 | 224 | 246 | 243 | 149 |
| Houston | 111 | 169 | 186 | 147 | 115 | 115 |
| Difference | -105 | -123 | -38 | -99 | -127 | -34 |
Cloud cover (%) Varies through 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 |
| Houston | 62 | 65 | 62 | 58 | 56 | 49 | 47 | 47 | 46 | 41 | 51 | 62 |
| Difference | +23 | +26 | +20 | +9 | +4 | -9 | -3 | +1 | -5 | -10 | +5 | +21 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 38 | 39 | 42 | 49 | 52 | 59 |
| Houston | 62 | 65 | 62 | 58 | 56 | 49 |
| Difference | +23 | +26 | +20 | +9 | +4 | -9 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 50 | 46 | 51 | 51 | 46 | 41 |
| Houston | 47 | 47 | 46 | 41 | 51 | 62 |
| Difference | -3 | +1 | -5 | -10 | +5 | +21 |
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 |
| Houston | 82 | 83 | 82 | 80 | 79 | 77 | 76 | 75 | 76 | 76 | 80 | 82 |
| Difference | +7 | +9 | +7 | +4 | +1 | -2 | -2 | -4 | -3 | -3 | +1 | +5 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 76 | 75 | 75 | 76 | 77 | 79 |
| Houston | 82 | 83 | 82 | 80 | 79 | 77 |
| Difference | +7 | +9 | +7 | +4 | +1 | -2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 79 | 79 | 79 | 79 | 79 | 77 |
| Houston | 76 | 75 | 76 | 76 | 80 | 82 |
| Difference | -2 | -4 | -3 | -3 | +1 | +5 |
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 → · Houston 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.
Houston
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Houston Nwso (NOAA GHCN station USC00414333), about 42 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 Houston → · Castries page · Houston page