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Castries vs Trondheim
Comparing Castries change · Trondheim change
Castries is the warmer of the two — about 38°F on the annual average; Castries is the wetter, with 44 in 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 38°F on the annual average.
Precipitation
Castries is the wetter — about 44 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 |
| Trondheim | 35 | 36 | 40 | 49 | 57 | 63 | 68 | 66 | 59 | 49 | 40 | 36 |
| Difference | -45 | -44 | -40 | -33 | -26 | -20 | -16 | -17 | -25 | -35 | -42 | -45 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 80 | 80 | 80 | 82 | 83 | 83 |
| Trondheim | 35 | 36 | 40 | 49 | 57 | 63 |
| Difference | -45 | -44 | -40 | -33 | -26 | -20 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 83 | 84 | 84 | 83 | 83 | 81 |
| Trondheim | 68 | 66 | 59 | 49 | 40 | 36 |
| Difference | -16 | -17 | -25 | -35 | -42 | -45 |
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 |
| Trondheim | 25 | 25 | 28 | 35 | 41 | 48 | 53 | 52 | 46 | 37 | 30 | 25 |
| Difference | -53 | -53 | -50 | -44 | -39 | -33 | -29 | -30 | -36 | -44 | -51 | -54 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 78 | 77 | 78 | 79 | 80 | 81 |
| Trondheim | 25 | 25 | 28 | 35 | 41 | 48 |
| Difference | -53 | -53 | -50 | -44 | -39 | -33 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 81 | 82 | 82 | 82 | 81 | 79 |
| Trondheim | 53 | 52 | 46 | 37 | 30 | 25 |
| Difference | -29 | -30 | -36 | -44 | -51 | -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 |
| Trondheim | 2.6 | 2.6 | 2.5 | 1.6 | 2.2 | 3.1 | 3 | 3.3 | 3.5 | 3.1 | 2.5 | 3 |
| Difference | -1.9 | -0.4 | -0.1 | -1.9 | -2.3 | -2.2 | -5.5 | -8.1 | -5.3 | -6.6 | -7 | -2.9 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 4.5 | 3 | 2.6 | 3.5 | 4.5 | 5.3 |
| Trondheim | 2.6 | 2.6 | 2.5 | 1.6 | 2.2 | 3.1 |
| Difference | -1.9 | -0.4 | -0.1 | -1.9 | -2.3 | -2.2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 8.5 | 11.5 | 8.8 | 9.7 | 9.6 | 5.9 |
| Trondheim | 3 | 3.3 | 3.5 | 3.1 | 2.5 | 3 |
| Difference | -5.5 | -8.1 | -5.3 | -6.6 | -7 | -2.9 |
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