Home › Compare › Jasper vs Castries
Jasper vs Castries
Comparing Jasper change · Castries change
Castries is the warmer of the two — about 43°F on the annual average; Castries is the wetter, with 63 in 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 43°F on the annual average.
Precipitation
Castries is the wetter — about 63 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jasper | 27 | 33 | 40 | 51 | 62 | 68 | 75 | 74 | 64 | 50 | 35 | 26 |
| Castries | 80 | 80 | 80 | 82 | 83 | 83 | 83 | 84 | 84 | 83 | 83 | 81 |
| Difference | +54 | +47 | +40 | +30 | +21 | +15 | +9 | +10 | +20 | +34 | +48 | +56 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Jasper | 27 | 33 | 40 | 51 | 62 | 68 |
| Castries | 80 | 80 | 80 | 82 | 83 | 83 |
| Difference | +54 | +47 | +40 | +30 | +21 | +15 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Jasper | 75 | 74 | 64 | 50 | 35 | 26 |
| Castries | 83 | 84 | 84 | 83 | 83 | 81 |
| Difference | +9 | +10 | +20 | +34 | +48 | +56 |
Avg low (°F) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jasper | 6 | 9 | 17 | 25 | 33 | 41 | 45 | 43 | 36 | 28 | 17 | 6 |
| Castries | 78 | 77 | 78 | 79 | 80 | 81 | 81 | 82 | 82 | 82 | 81 | 79 |
| Difference | +72 | +69 | +61 | +54 | +47 | +40 | +36 | +39 | +46 | +54 | +63 | +73 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Jasper | 6 | 9 | 17 | 25 | 33 | 41 |
| Castries | 78 | 77 | 78 | 79 | 80 | 81 |
| Difference | +72 | +69 | +61 | +54 | +47 | +40 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Jasper | 45 | 43 | 36 | 28 | 17 | 6 |
| Castries | 81 | 82 | 82 | 82 | 81 | 79 |
| Difference | +36 | +39 | +46 | +54 | +63 | +73 |
Precipitation (in) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jasper | 0.9 | 0.5 | 0.8 | 0.7 | 1.3 | 2.2 | 2.1 | 1.8 | 1.3 | 1.1 | 1.1 | 0.7 |
| Castries | 4.5 | 3 | 2.6 | 3.5 | 4.5 | 5.3 | 8.5 | 11.5 | 8.8 | 9.7 | 9.6 | 5.9 |
| Difference | +3.6 | +2.4 | +1.8 | +2.8 | +3.2 | +3.1 | +6.4 | +9.7 | +7.5 | +8.6 | +8.5 | +5.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Jasper | 0.9 | 0.5 | 0.8 | 0.7 | 1.3 | 2.2 |
| Castries | 4.5 | 3 | 2.6 | 3.5 | 4.5 | 5.3 |
| Difference | +3.6 | +2.4 | +1.8 | +2.8 | +3.2 | +3.1 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Jasper | 2.1 | 1.8 | 1.3 | 1.1 | 1.1 | 0.7 |
| Castries | 8.5 | 11.5 | 8.8 | 9.7 | 9.6 | 5.9 |
| Difference | +6.4 | +9.7 | +7.5 | +8.6 | +8.5 | +5.2 |
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