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Castries vs Ulan Bator
Comparing Castries change · Ulan Bator change
Castries is the warmer of the two — about 51°F on the annual average; Castries is the wetter, with 69 in more rain a year, and Castries the sunnier.
How the seasons compare
The differences between Castries and Ulan Bator, in everyday terms.
Summers
Castries has hotter summers
Castries: Warm
Ulan Bator: Mild
Winters
Castries has far milder winters
Castries: Stays warm
Ulan Bator: Bitterly cold
Rain & snow
Castries is much wetter
Castries: Very wet
Ulan Bator: Very dry
Sky
Castries is sunnier
Castries: Fairly sunny
Ulan Bator: Partly cloudy
Month-by-month charts
Temperature
Castries is the warmer of the two — about 51°F on the annual average.
Precipitation
Castries is the wetter — about 69 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 |
| Ulan Bator | 4 | 15 | 32 | 50 | 63 | 74 | 78 | 74 | 63 | 46 | 23 | 7 |
| Difference | -76 | -65 | -48 | -31 | -19 | -9 | -6 | -10 | -21 | -38 | -60 | -74 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 80 | 80 | 80 | 82 | 83 | 83 |
| Ulan Bator | 4 | 15 | 32 | 50 | 63 | 74 |
| Difference | -76 | -65 | -48 | -31 | -19 | -9 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 83 | 84 | 84 | 83 | 83 | 81 |
| Ulan Bator | 78 | 74 | 63 | 46 | 23 | 7 |
| Difference | -6 | -10 | -21 | -38 | -60 | -74 |
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 |
| Ulan Bator | -23 | -16 | 3 | 21 | 34 | 47 | 53 | 48 | 34 | 18 | -3 | -18 |
| Difference | -101 | -93 | -74 | -58 | -46 | -34 | -28 | -34 | -48 | -64 | -84 | -97 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 78 | 77 | 78 | 79 | 80 | 81 |
| Ulan Bator | -23 | -16 | 3 | 21 | 34 | 47 |
| Difference | -101 | -93 | -74 | -58 | -46 | -34 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 81 | 82 | 82 | 82 | 81 | 79 |
| Ulan Bator | 53 | 48 | 34 | 18 | -3 | -18 |
| Difference | -28 | -34 | -48 | -64 | -84 | -97 |
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 |
| Ulan Bator | 0.1 | 0.1 | 0.2 | 0.3 | 0.7 | 1.4 | 2.1 | 1.6 | 0.7 | 0.3 | 0.2 | 0.1 |
| Difference | -4.4 | -2.9 | -2.4 | -3.2 | -3.8 | -3.9 | -6.4 | -9.8 | -8.1 | -9.4 | -9.3 | -5.8 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 4.5 | 3 | 2.6 | 3.5 | 4.5 | 5.3 |
| Ulan Bator | 0.1 | 0.1 | 0.2 | 0.3 | 0.7 | 1.4 |
| Difference | -4.4 | -2.9 | -2.4 | -3.2 | -3.8 | -3.9 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 8.5 | 11.5 | 8.8 | 9.7 | 9.6 | 5.9 |
| Ulan Bator | 2.1 | 1.6 | 0.7 | 0.3 | 0.2 | 0.1 |
| Difference | -6.4 | -9.8 | -8.1 | -9.4 | -9.3 | -5.8 |
Cloud cover (%) Ulan Bator 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 |
| Ulan Bator | 41 | 46 | 52 | 57 | 60 | 66 | 66 | 60 | 52 | 49 | 50 | 50 |
| Difference | +3 | +7 | +10 | +8 | +8 | +7 | +17 | +13 | +2 | -2 | +4 | +9 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 38 | 39 | 42 | 49 | 52 | 59 |
| Ulan Bator | 41 | 46 | 52 | 57 | 60 | 66 |
| Difference | +3 | +7 | +10 | +8 | +8 | +7 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 50 | 46 | 51 | 51 | 46 | 41 |
| Ulan Bator | 66 | 60 | 52 | 49 | 50 | 50 |
| Difference | +17 | +13 | +2 | -2 | +4 | +9 |
Relative humidity (%) Varies through 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 |
| Ulan Bator | 90 | 85 | 69 | 53 | 50 | 53 | 59 | 63 | 61 | 66 | 80 | 89 |
| Difference | +14 | +10 | -6 | -23 | -28 | -26 | -19 | -16 | -17 | -13 | +1 | +12 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 76 | 75 | 75 | 76 | 77 | 79 |
| Ulan Bator | 90 | 85 | 69 | 53 | 50 | 53 |
| Difference | +14 | +10 | -6 | -23 | -28 | -26 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 79 | 79 | 79 | 79 | 79 | 77 |
| Ulan Bator | 59 | 63 | 61 | 66 | 80 | 89 |
| Difference | -19 | -16 | -17 | -13 | +1 | +12 |
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 → · Ulan Bator trends →
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.
Ulan Bator
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Chinggis Khaan Intl / Buyant Ukhaa Intl, a weather station, about 11 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 Ulan Bator → · Castries page · Ulan Bator page