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Castries vs Trondheim
Comparing Castries change · Trondheim change
Castries is the warmer of the two — about 21°C on the annual average; Castries is the wetter, with 1123 mm more rain a year, and Castries the sunnier.
How the seasons compare
The differences between Castries and Trondheim, in everyday terms.
Summers
Castries has far hotter summers
Castries: Warm
Trondheim: Mild
Winters
Castries has far milder winters
Castries: Stays warm
Trondheim: Cold
Rain & snow
Castries is much wetter
Castries: Very wet
Trondheim: Moderate rainfall
Sky
Castries is far sunnier
Castries: Fairly sunny
Trondheim: Often grey
Month-by-month charts
Temperature
Castries is the warmer of the two — about 21°C on the annual average.
Precipitation
Castries is the wetter — about 1123 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 |
| Trondheim | 2 | 2 | 5 | 9 | 14 | 17 | 20 | 19 | 15 | 9 | 5 | 2 |
| Difference | -25 | -25 | -22 | -18 | -14 | -11 | -9 | -10 | -14 | -19 | -23 | -25 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 27 | 27 | 27 | 28 | 28 | 28 |
| Trondheim | 2 | 2 | 5 | 9 | 14 | 17 |
| Difference | -25 | -25 | -22 | -18 | -14 | -11 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 28 | 29 | 29 | 29 | 28 | 27 |
| Trondheim | 20 | 19 | 15 | 9 | 5 | 2 |
| Difference | -9 | -10 | -14 | -19 | -23 | -25 |
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 |
| Trondheim | -4 | -4 | -2 | 1 | 5 | 9 | 11 | 11 | 8 | 3 | -1 | -4 |
| Difference | -30 | -29 | -28 | -25 | -22 | -18 | -16 | -17 | -20 | -25 | -28 | -30 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 26 | 25 | 25 | 26 | 27 | 27 |
| Trondheim | -4 | -4 | -2 | 1 | 5 | 9 |
| Difference | -30 | -29 | -28 | -25 | -22 | -18 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 27 | 28 | 28 | 28 | 27 | 26 |
| Trondheim | 11 | 11 | 8 | 3 | -1 | -4 |
| Difference | -16 | -17 | -20 | -25 | -28 | -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 |
| Trondheim | 66 | 65 | 63 | 42 | 55 | 78 | 77 | 85 | 89 | 79 | 65 | 76 |
| Difference | -47 | -11 | -4 | -48 | -59 | -56 | -139 | -207 | -135 | -167 | -178 | -73 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 113 | 76 | 66 | 90 | 114 | 134 |
| Trondheim | 66 | 65 | 63 | 42 | 55 | 78 |
| Difference | -47 | -11 | -4 | -48 | -59 | -56 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 216 | 291 | 224 | 246 | 243 | 149 |
| Trondheim | 77 | 85 | 89 | 79 | 65 | 76 |
| Difference | -139 | -207 | -135 | -167 | -178 | -73 |
Cloud cover (%) Trondheim 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 |
| Trondheim | 78 | 77 | 77 | 73 | 77 | 79 | 76 | 76 | 74 | 75 | 75 | 76 |
| Difference | +39 | +38 | +35 | +24 | +25 | +20 | +26 | +30 | +23 | +24 | +29 | +35 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 38 | 39 | 42 | 49 | 52 | 59 |
| Trondheim | 78 | 77 | 77 | 73 | 77 | 79 |
| Difference | +39 | +38 | +35 | +24 | +25 | +20 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 50 | 46 | 51 | 51 | 46 | 41 |
| Trondheim | 76 | 76 | 74 | 75 | 75 | 76 |
| Difference | +26 | +30 | +23 | +24 | +29 | +35 |
Relative humidity (%) Trondheim runs higher most of 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 |
| Trondheim | 95 | 96 | 94 | 86 | 80 | 81 | 83 | 86 | 88 | 92 | 95 | 96 |
| Difference | +20 | +21 | +19 | +10 | +3 | +2 | +4 | +7 | +9 | +13 | +16 | +19 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 76 | 75 | 75 | 76 | 77 | 79 |
| Trondheim | 95 | 96 | 94 | 86 | 80 | 81 |
| Difference | +20 | +21 | +19 | +10 | +3 | +2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 79 | 79 | 79 | 79 | 79 | 77 |
| Trondheim | 83 | 86 | 88 | 92 | 95 | 96 |
| Difference | +4 | +7 | +9 | +13 | +16 | +19 |
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 → · Trondheim 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.
Trondheim
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Vaernes, a weather station, about 26 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 Castries · change Trondheim → · Castries page · Trondheim page