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Castries vs Kathmandu
Comparing Castries change · Kathmandu change
Castries is the warmer of the two — about 15°F on the annual average; Castries is the wetter, with 23 in more rain a year, and Castries the sunnier.
How the seasons compare
The differences between Castries and Kathmandu, in everyday terms.
Summers
Summers are nearly the same
Castries: Warm
Kathmandu: Warm
Winters
Castries has far milder winters
Castries: Stays warm
Kathmandu: Chilly
Rain & snow
Castries is wetter
Castries: Very wet
Kathmandu: Wet
Sky
Castries is sunnier
Castries: Fairly sunny
Kathmandu: Partly cloudy
Month-by-month charts
Temperature
Castries is the warmer of the two — about 15°F on the annual average.
Precipitation
Castries is the wetter — about 23 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 |
| Kathmandu | 66 | 71 | 78 | 83 | 84 | 85 | 83 | 84 | 83 | 80 | 75 | 69 |
| Difference | -14 | -9 | -2 | +1 | +2 | +2 | — | — | -1 | -3 | -8 | -13 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 80 | 80 | 80 | 82 | 83 | 83 |
| Kathmandu | 66 | 71 | 78 | 83 | 84 | 85 |
| Difference | -14 | -9 | -2 | +1 | +2 | +2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 83 | 84 | 84 | 83 | 83 | 81 |
| Kathmandu | 83 | 84 | 83 | 80 | 75 | 69 |
| Difference | — | — | -1 | -3 | -8 | -13 |
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 |
| Kathmandu | 36 | 41 | 47 | 53 | 60 | 66 | 68 | 68 | 65 | 56 | 46 | 38 |
| Difference | -42 | -37 | -31 | -26 | -20 | -14 | -13 | -14 | -17 | -26 | -35 | -41 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 78 | 77 | 78 | 79 | 80 | 81 |
| Kathmandu | 36 | 41 | 47 | 53 | 60 | 66 |
| Difference | -42 | -37 | -31 | -26 | -20 | -14 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 81 | 82 | 82 | 82 | 81 | 79 |
| Kathmandu | 68 | 68 | 65 | 56 | 46 | 38 |
| Difference | -13 | -14 | -17 | -26 | -35 | -41 |
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 |
| Kathmandu | 0.6 | 0.8 | 2 | 3 | 3.3 | 8 | 14.4 | 10.8 | 8.6 | 3 | 0.3 | 0 |
| Difference | -3.9 | -2.2 | -0.6 | -0.6 | -1.2 | +2.7 | +5.9 | -0.7 | -0.2 | -6.7 | -9.2 | -5.9 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 4.5 | 3 | 2.6 | 3.5 | 4.5 | 5.3 |
| Kathmandu | 0.6 | 0.8 | 2 | 3 | 3.3 | 8 |
| Difference | -3.9 | -2.2 | -0.6 | -0.6 | -1.2 | +2.7 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 8.5 | 11.5 | 8.8 | 9.7 | 9.6 | 5.9 |
| Kathmandu | 14.4 | 10.8 | 8.6 | 3 | 0.3 | 0 |
| Difference | +5.9 | -0.7 | -0.2 | -6.7 | -9.2 | -5.9 |
Cloud cover (%) Kathmandu 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 |
| Kathmandu | 39 | 43 | 45 | 51 | 58 | 72 | 86 | 84 | 71 | 44 | 33 | 34 |
| Difference | +1 | +4 | +3 | +2 | +5 | +14 | +36 | +37 | +21 | -7 | -13 | -7 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 38 | 39 | 42 | 49 | 52 | 59 |
| Kathmandu | 39 | 43 | 45 | 51 | 58 | 72 |
| Difference | +1 | +4 | +3 | +2 | +5 | +14 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 50 | 46 | 51 | 51 | 46 | 41 |
| Kathmandu | 86 | 84 | 71 | 44 | 33 | 34 |
| Difference | +36 | +37 | +21 | -7 | -13 | -7 |
Relative humidity (%) Castries 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 |
| Kathmandu | 43 | 39 | 33 | 32 | 45 | 64 | 82 | 86 | 84 | 69 | 55 | 46 |
| Difference | -33 | -36 | -42 | -44 | -33 | -15 | +4 | +7 | +6 | -10 | -24 | -30 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 76 | 75 | 75 | 76 | 77 | 79 |
| Kathmandu | 43 | 39 | 33 | 32 | 45 | 64 |
| Difference | -33 | -36 | -42 | -44 | -33 | -15 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 79 | 79 | 79 | 79 | 79 | 77 |
| Kathmandu | 82 | 86 | 84 | 69 | 55 | 46 |
| Difference | +4 | +7 | +6 | -10 | -24 | -30 |
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 → · Kathmandu 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.
Kathmandu
Temperature & precipitation — 1991–2020 normals computed from 16 years of daily observations at Kathmandu Airport, a weather station, about 5 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.
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