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Castries vs Las Vegas
Comparing Castries change · Las Vegas change
Castries is the warmer of the two — about 11°F on the annual average; Castries is the wetter, with 73 in more rain a year, and Las Vegas the sunnier.
How the seasons compare
The differences between Castries and Las Vegas, in everyday terms.
Summers
Las Vegas has far hotter summers
Castries: Warm
Las Vegas: Very hot
Winters
Castries has far milder winters
Castries: Stays warm
Las Vegas: Chilly
Rain & snow
Castries is much wetter
Castries: Very wet
Las Vegas: Very dry
Sky
Las Vegas is sunnier
Castries: Fairly sunny
Las Vegas: Fairly sunny
Month-by-month charts
Temperature
Castries is the warmer of the two — about 11°F on the annual average.
Precipitation
Castries is the wetter — about 73 in more across the year.
Clear skies
Las Vegas 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) Varies through 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 |
| Las Vegas | 59 | 63 | 71 | 79 | 89 | 99 | 105 | 103 | 95 | 81 | 67 | 57 |
| Difference | -22 | -17 | -9 | -3 | +6 | +16 | +21 | +19 | +11 | -2 | -15 | -24 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 80 | 80 | 80 | 82 | 83 | 83 |
| Las Vegas | 59 | 63 | 71 | 79 | 89 | 99 |
| Difference | -22 | -17 | -9 | -3 | +6 | +16 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 83 | 84 | 84 | 83 | 83 | 81 |
| Las Vegas | 105 | 103 | 95 | 81 | 67 | 57 |
| Difference | +21 | +19 | +11 | -2 | -15 | -24 |
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 |
| Las Vegas | 41 | 44 | 51 | 57 | 66 | 76 | 82 | 81 | 72 | 60 | 47 | 40 |
| Difference | -38 | -33 | -27 | -22 | -14 | -5 | +1 | -1 | -10 | -22 | -33 | -40 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 78 | 77 | 78 | 79 | 80 | 81 |
| Las Vegas | 41 | 44 | 51 | 57 | 66 | 76 |
| Difference | -38 | -33 | -27 | -22 | -14 | -5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 81 | 82 | 82 | 82 | 81 | 79 |
| Las Vegas | 82 | 81 | 72 | 60 | 47 | 40 |
| Difference | +1 | -1 | -10 | -22 | -33 | -40 |
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 |
| Las Vegas | 0.6 | 0.8 | 0.4 | 0.2 | 0.1 | 0 | 0.4 | 0.3 | 0.3 | 0.3 | 0.3 | 0.5 |
| Difference | -3.9 | -2.2 | -2.2 | -3.3 | -4.4 | -5.2 | -8.1 | -11.2 | -8.5 | -9.4 | -9.3 | -5.4 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 4.5 | 3 | 2.6 | 3.5 | 4.5 | 5.3 |
| Las Vegas | 0.6 | 0.8 | 0.4 | 0.2 | 0.1 | 0 |
| Difference | -3.9 | -2.2 | -2.2 | -3.3 | -4.4 | -5.2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 8.5 | 11.5 | 8.8 | 9.7 | 9.6 | 5.9 |
| Las Vegas | 0.4 | 0.3 | 0.3 | 0.3 | 0.3 | 0.5 |
| Difference | -8.1 | -11.2 | -8.5 | -9.4 | -9.3 | -5.4 |
Cloud cover (%) Varies through 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 |
| Las Vegas | 48 | 49 | 46 | 41 | 38 | 27 | 36 | 33 | 25 | 31 | 38 | 47 |
| Difference | +10 | +10 | +4 | -8 | -14 | -32 | -14 | -13 | -26 | -20 | -8 | +6 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 38 | 39 | 42 | 49 | 52 | 59 |
| Las Vegas | 48 | 49 | 46 | 41 | 38 | 27 |
| Difference | +10 | +10 | +4 | -8 | -14 | -32 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 50 | 46 | 51 | 51 | 46 | 41 |
| Las Vegas | 36 | 33 | 25 | 31 | 38 | 47 |
| Difference | -14 | -13 | -26 | -20 | -8 | +6 |
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 |
| Las Vegas | 48 | 45 | 39 | 30 | 24 | 16 | 21 | 24 | 24 | 28 | 36 | 45 |
| Difference | -28 | -30 | -36 | -46 | -54 | -63 | -57 | -55 | -54 | -52 | -43 | -31 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 76 | 75 | 75 | 76 | 77 | 79 |
| Las Vegas | 48 | 45 | 39 | 30 | 24 | 16 |
| Difference | -28 | -30 | -36 | -46 | -54 | -63 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 79 | 79 | 79 | 79 | 79 | 77 |
| Las Vegas | 21 | 24 | 24 | 28 | 36 | 45 |
| Difference | -57 | -55 | -54 | -52 | -43 | -31 |
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 → · Las Vegas 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.
Las Vegas
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Mccarran Intl AP (NOAA GHCN station USW00023169), about 12 km from the city centre.
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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