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Castries vs Pittsburgh
Comparing Castries change · Pittsburgh change
Castries is the warmer of the two — about 29°F on the annual average; Castries is the wetter, with 35 in 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 29°F on the annual average.
Precipitation
Castries is the wetter — about 35 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 |
| Pittsburgh | 39 | 42 | 51 | 64 | 74 | 81 | 85 | 83 | 77 | 65 | 53 | 43 |
| Difference | -42 | -38 | -30 | -18 | -9 | -2 | +2 | — | -7 | -18 | -30 | -39 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 80 | 80 | 80 | 82 | 83 | 83 |
| Pittsburgh | 39 | 42 | 51 | 64 | 74 | 81 |
| Difference | -42 | -38 | -30 | -18 | -9 | -2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 83 | 84 | 84 | 83 | 83 | 81 |
| Pittsburgh | 85 | 83 | 77 | 65 | 53 | 43 |
| Difference | +2 | — | -7 | -18 | -30 | -39 |
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 |
| Pittsburgh | 21 | 22 | 29 | 38 | 47 | 57 | 61 | 60 | 53 | 42 | 32 | 25 |
| Difference | -58 | -56 | -49 | -41 | -33 | -24 | -20 | -22 | -29 | -40 | -49 | -54 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 78 | 77 | 78 | 79 | 80 | 81 |
| Pittsburgh | 21 | 22 | 29 | 38 | 47 | 57 |
| Difference | -58 | -56 | -49 | -41 | -33 | -24 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 81 | 82 | 82 | 82 | 81 | 79 |
| Pittsburgh | 61 | 60 | 53 | 42 | 32 | 25 |
| Difference | -20 | -22 | -29 | -40 | -49 | -54 |
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 |
| Pittsburgh | 3 | 2.5 | 3.2 | 3.8 | 4 | 5 | 4.1 | 3.5 | 3.5 | 3.2 | 3 | 3.6 |
| Difference | -1.4 | -0.4 | +0.6 | +0.2 | -0.5 | -0.3 | -4.4 | -7.9 | -5.4 | -6.5 | -6.6 | -2.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 4.5 | 3 | 2.6 | 3.5 | 4.5 | 5.3 |
| Pittsburgh | 3 | 2.5 | 3.2 | 3.8 | 4 | 5 |
| Difference | -1.4 | -0.4 | +0.6 | +0.2 | -0.5 | -0.3 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 8.5 | 11.5 | 8.8 | 9.7 | 9.6 | 5.9 |
| Pittsburgh | 4.1 | 3.5 | 3.5 | 3.2 | 3 | 3.6 |
| Difference | -4.4 | -7.9 | -5.4 | -6.5 | -6.6 | -2.3 |
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