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Jasper vs Castries
Comparing Jasper change · Castries change
Castries is the warmer of the two — about 24°C on the annual average; Castries is the wetter, with 1599 mm more rain a year, and Castries the sunnier.
How the seasons compare
The differences between Jasper and Castries, in everyday terms.
Summers
Castries has much hotter summers
Jasper: Mild
Castries: Warm
Winters
Castries has far milder winters
Jasper: Very cold
Castries: Stays warm
Rain & snow
Castries is much wetter
Jasper: Fairly dry
Castries: Very wet
Sky
Castries is far sunnier
Jasper: Often cloudy
Castries: Fairly sunny
Month-by-month charts
Temperature
Castries is the warmer of the two — about 24°C on the annual average.
Precipitation
Castries is the wetter — about 1599 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jasper | -3 | 1 | 4 | 11 | 17 | 20 | 24 | 23 | 18 | 10 | 2 | -4 |
| Castries | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 28 | 27 |
| Difference | +30 | +26 | +22 | +17 | +12 | +8 | +5 | +6 | +11 | +19 | +26 | +31 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Jasper | -3 | 1 | 4 | 11 | 17 | 20 |
| Castries | 27 | 27 | 27 | 28 | 28 | 28 |
| Difference | +30 | +26 | +22 | +17 | +12 | +8 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Jasper | 24 | 23 | 18 | 10 | 2 | -4 |
| Castries | 28 | 29 | 29 | 29 | 28 | 27 |
| Difference | +5 | +6 | +11 | +19 | +26 | +31 |
Avg low (°C) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jasper | -15 | -13 | -9 | -4 | 1 | 5 | 7 | 6 | 2 | -2 | -8 | -14 |
| Castries | 26 | 25 | 25 | 26 | 27 | 27 | 27 | 28 | 28 | 28 | 27 | 26 |
| Difference | +40 | +38 | +34 | +30 | +26 | +22 | +20 | +22 | +25 | +30 | +35 | +41 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Jasper | -15 | -13 | -9 | -4 | 1 | 5 |
| Castries | 26 | 25 | 25 | 26 | 27 | 27 |
| Difference | +40 | +38 | +34 | +30 | +26 | +22 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Jasper | 7 | 6 | 2 | -2 | -8 | -14 |
| Castries | 27 | 28 | 28 | 28 | 27 | 26 |
| Difference | +20 | +22 | +25 | +30 | +35 | +41 |
Precipitation (mm) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jasper | 22 | 14 | 21 | 18 | 32 | 55 | 54 | 45 | 33 | 27 | 27 | 17 |
| Castries | 113 | 76 | 66 | 90 | 114 | 134 | 216 | 291 | 224 | 246 | 243 | 149 |
| Difference | +92 | +62 | +46 | +72 | +82 | +79 | +162 | +247 | +191 | +219 | +216 | +132 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Jasper | 22 | 14 | 21 | 18 | 32 | 55 |
| Castries | 113 | 76 | 66 | 90 | 114 | 134 |
| Difference | +92 | +62 | +46 | +72 | +82 | +79 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Jasper | 54 | 45 | 33 | 27 | 27 | 17 |
| Castries | 216 | 291 | 224 | 246 | 243 | 149 |
| Difference | +162 | +247 | +191 | +219 | +216 | +132 |
Cloud cover (%) Jasper runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jasper | 70 | 68 | 74 | 73 | 73 | 78 | 67 | 64 | 67 | 75 | 76 | 70 |
| Castries | 38 | 39 | 42 | 49 | 52 | 59 | 50 | 46 | 51 | 51 | 46 | 41 |
| Difference | -31 | -29 | -32 | -23 | -21 | -19 | -17 | -17 | -16 | -24 | -29 | -30 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Jasper | 70 | 68 | 74 | 73 | 73 | 78 |
| Castries | 38 | 39 | 42 | 49 | 52 | 59 |
| Difference | -31 | -29 | -32 | -23 | -21 | -19 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Jasper | 67 | 64 | 67 | 75 | 76 | 70 |
| Castries | 50 | 46 | 51 | 51 | 46 | 41 |
| Difference | -17 | -17 | -16 | -24 | -29 | -30 |
Relative humidity (%) Varies through the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jasper | 94 | 93 | 90 | 83 | 73 | 73 | 73 | 74 | 77 | 82 | 91 | 94 |
| Castries | 76 | 75 | 75 | 76 | 77 | 79 | 79 | 79 | 79 | 79 | 79 | 77 |
| Difference | -19 | -19 | -15 | -7 | +4 | +5 | +5 | +5 | +2 | -3 | -12 | -17 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Jasper | 94 | 93 | 90 | 83 | 73 | 73 |
| Castries | 76 | 75 | 75 | 76 | 77 | 79 |
| Difference | -19 | -19 | -15 | -7 | +4 | +5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Jasper | 73 | 74 | 77 | 82 | 91 | 94 |
| Castries | 79 | 79 | 79 | 79 | 79 | 77 |
| Difference | +5 | +5 | +2 | -3 | -12 | -17 |
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. Jasper trends → · Castries trends →
Methodology & sources
Jasper
Temperature & precipitation — 1991–2020 normals computed from 27 years of daily observations at Jasper Warden, a weather station, about 7 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.
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.
← change Jasper · change Castries → · Jasper page · Castries page