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Castries vs Pittsburgh
Comparing Castries change · Pittsburgh change
Castries is the warmer of the two — about 16°C on the annual average; Castries is the wetter, with 886 mm more rain a year, and Castries the sunnier.
How the seasons compare
The differences between Castries and Pittsburgh, in everyday terms.
Summers
Summers are nearly the same
Castries: Warm
Pittsburgh: Warm
Winters
Castries has far milder winters
Castries: Stays warm
Pittsburgh: Cold
Rain & snow
Castries is wetter
Castries: Very wet
Pittsburgh: Wet
Sky
Castries is sunnier
Castries: Fairly sunny
Pittsburgh: Often cloudy
Month-by-month charts
Temperature
Castries is the warmer of the two — about 16°C on the annual average.
Precipitation
Castries is the wetter — about 886 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 |
| Pittsburgh | 4 | 5 | 11 | 18 | 23 | 27 | 29 | 29 | 25 | 18 | 12 | 6 |
| Difference | -23 | -21 | -16 | -10 | -5 | -1 | +1 | — | -4 | -10 | -17 | -22 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 27 | 27 | 27 | 28 | 28 | 28 |
| Pittsburgh | 4 | 5 | 11 | 18 | 23 | 27 |
| Difference | -23 | -21 | -16 | -10 | -5 | -1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 28 | 29 | 29 | 29 | 28 | 27 |
| Pittsburgh | 29 | 29 | 25 | 18 | 12 | 6 |
| Difference | +1 | — | -4 | -10 | -17 | -22 |
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 |
| Pittsburgh | -6 | -6 | -2 | 3 | 9 | 14 | 16 | 16 | 12 | 5 | 0 | -4 |
| Difference | -32 | -31 | -27 | -23 | -18 | -13 | -11 | -12 | -16 | -22 | -27 | -30 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 26 | 25 | 25 | 26 | 27 | 27 |
| Pittsburgh | -6 | -6 | -2 | 3 | 9 | 14 |
| Difference | -32 | -31 | -27 | -23 | -18 | -13 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 27 | 28 | 28 | 28 | 27 | 26 |
| Pittsburgh | 16 | 16 | 12 | 5 | 0 | -4 |
| Difference | -11 | -12 | -16 | -22 | -27 | -30 |
Precipitation (mm) Castries runs higher most of 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 |
| Pittsburgh | 77 | 65 | 81 | 96 | 101 | 127 | 105 | 90 | 88 | 81 | 76 | 90 |
| Difference | -36 | -11 | +15 | +6 | -12 | -7 | -112 | -202 | -136 | -165 | -167 | -59 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 113 | 76 | 66 | 90 | 114 | 134 |
| Pittsburgh | 77 | 65 | 81 | 96 | 101 | 127 |
| Difference | -36 | -11 | +15 | +6 | -12 | -7 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 216 | 291 | 224 | 246 | 243 | 149 |
| Pittsburgh | 105 | 90 | 88 | 81 | 76 | 90 |
| Difference | -112 | -202 | -136 | -165 | -167 | -59 |
Cloud cover (%) Pittsburgh 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 |
| Pittsburgh | 77 | 75 | 72 | 69 | 68 | 63 | 59 | 57 | 56 | 63 | 70 | 77 |
| Difference | +38 | +37 | +30 | +20 | +16 | +4 | +9 | +11 | +5 | +12 | +23 | +36 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 38 | 39 | 42 | 49 | 52 | 59 |
| Pittsburgh | 77 | 75 | 72 | 69 | 68 | 63 |
| Difference | +38 | +37 | +30 | +20 | +16 | +4 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 50 | 46 | 51 | 51 | 46 | 41 |
| Pittsburgh | 59 | 57 | 56 | 63 | 70 | 77 |
| Difference | +9 | +11 | +5 | +12 | +23 | +36 |
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 |
| Pittsburgh | 88 | 86 | 82 | 78 | 78 | 76 | 71 | 68 | 70 | 75 | 81 | 86 |
| Difference | +12 | +11 | +7 | +2 | — | -2 | -8 | -11 | -8 | -4 | +2 | +9 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 76 | 75 | 75 | 76 | 77 | 79 |
| Pittsburgh | 88 | 86 | 82 | 78 | 78 | 76 |
| Difference | +12 | +11 | +7 | +2 | — | -2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 79 | 79 | 79 | 79 | 79 | 77 |
| Pittsburgh | 71 | 68 | 70 | 75 | 81 | 86 |
| Difference | -8 | -11 | -8 | -4 | +2 | +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 → · Pittsburgh 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.
Pittsburgh
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Mckeesport (NOAA GHCN station USC00365573), about 16 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 Pittsburgh → · Castries page · Pittsburgh page