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Castries vs Mammoth Lakes
Comparing Castries change · Mammoth Lakes change
Castries is the warmer of the two — about 38°F on the annual average; Castries is the wetter, with 55 in more rain a year.
How the seasons compare
The differences between Castries and Mammoth Lakes, in everyday terms.
Summers
Castries has hotter summers
Castries: Warm
Mammoth Lakes: Warm
Winters
Castries has far milder winters
Castries: Stays warm
Mammoth Lakes: Very cold
Rain & snow
Castries is much wetter
Castries: Very wet
Mammoth Lakes: Fairly dry
Sky
Similar amounts of sun
Castries: Fairly sunny
Mammoth Lakes: Fairly sunny
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 55 in more across the year.
Clear skies
The two cities see a similar amount of sun.
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 |
| Mammoth Lakes | 41 | 41 | 46 | 51 | 60 | 70 | 78 | 77 | 71 | 60 | 49 | 41 |
| Difference | -39 | -39 | -35 | -31 | -23 | -13 | -5 | -7 | -13 | -23 | -34 | -40 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 80 | 80 | 80 | 82 | 83 | 83 |
| Mammoth Lakes | 41 | 41 | 46 | 51 | 60 | 70 |
| Difference | -39 | -39 | -35 | -31 | -23 | -13 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 83 | 84 | 84 | 83 | 83 | 81 |
| Mammoth Lakes | 78 | 77 | 71 | 60 | 49 | 41 |
| Difference | -5 | -7 | -13 | -23 | -34 | -40 |
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 |
| Mammoth Lakes | 17 | 17 | 22 | 26 | 34 | 41 | 48 | 46 | 40 | 30 | 23 | 17 |
| Difference | -61 | -60 | -56 | -53 | -47 | -40 | -33 | -36 | -42 | -52 | -58 | -62 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 78 | 77 | 78 | 79 | 80 | 81 |
| Mammoth Lakes | 17 | 17 | 22 | 26 | 34 | 41 |
| Difference | -61 | -60 | -56 | -53 | -47 | -40 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 81 | 82 | 82 | 82 | 81 | 79 |
| Mammoth Lakes | 48 | 46 | 40 | 30 | 23 | 17 |
| Difference | -33 | -36 | -42 | -52 | -58 | -62 |
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 |
| Mammoth Lakes | 3.5 | 3.3 | 2.6 | 1.4 | 1.3 | 0.5 | 0.6 | 0.5 | 0.4 | 1.6 | 2.3 | 3.7 |
| Difference | -1 | +0.4 | — | -2.2 | -3.2 | -4.8 | -7.9 | -11 | -8.5 | -8.1 | -7.2 | -2.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 4.5 | 3 | 2.6 | 3.5 | 4.5 | 5.3 |
| Mammoth Lakes | 3.5 | 3.3 | 2.6 | 1.4 | 1.3 | 0.5 |
| Difference | -1 | +0.4 | — | -2.2 | -3.2 | -4.8 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 8.5 | 11.5 | 8.8 | 9.7 | 9.6 | 5.9 |
| Mammoth Lakes | 0.6 | 0.5 | 0.4 | 1.6 | 2.3 | 3.7 |
| Difference | -7.9 | -11 | -8.5 | -8.1 | -7.2 | -2.2 |
Snowfall (in)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Castries | — | — | — | — | — | — | — | — | — | — | — | — |
| Mammoth Lakes | 33.9 | 38.6 | 28.3 | 14.7 | 4.1 | 0.4 | 0 | 0 | 0.1 | 5.2 | 12.6 | 38.6 |
| Difference | — | — | — | — | — | — | — | — | — | — | — | — |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | — | — | — | — | — | — |
| Mammoth Lakes | 33.9 | 38.6 | 28.3 | 14.7 | 4.1 | 0.4 |
| Difference | — | — | — | — | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | — | — | — | — | — | — |
| Mammoth Lakes | 0 | 0 | 0.1 | 5.2 | 12.6 | 38.6 |
| Difference | — | — | — | — | — | — |
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 |
| Mammoth Lakes | 56 | 59 | 57 | 54 | 52 | 36 | 35 | 28 | 26 | 33 | 45 | 54 |
| Difference | +17 | +20 | +15 | +5 | — | -22 | -15 | -18 | -25 | -19 | -1 | +14 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 38 | 39 | 42 | 49 | 52 | 59 |
| Mammoth Lakes | 56 | 59 | 57 | 54 | 52 | 36 |
| Difference | +17 | +20 | +15 | +5 | — | -22 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 50 | 46 | 51 | 51 | 46 | 41 |
| Mammoth Lakes | 35 | 28 | 26 | 33 | 45 | 54 |
| Difference | -15 | -18 | -25 | -19 | -1 | +14 |
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 |
| Mammoth Lakes | 70 | 73 | 72 | 65 | 58 | 45 | 40 | 35 | 38 | 44 | 55 | 68 |
| Difference | -6 | -1 | -3 | -11 | -19 | -33 | -39 | -44 | -41 | -35 | -24 | -9 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 76 | 75 | 75 | 76 | 77 | 79 |
| Mammoth Lakes | 70 | 73 | 72 | 65 | 58 | 45 |
| Difference | -6 | -1 | -3 | -11 | -19 | -33 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 79 | 79 | 79 | 79 | 79 | 77 |
| Mammoth Lakes | 40 | 35 | 38 | 44 | 55 | 68 |
| Difference | -39 | -44 | -41 | -35 | -24 | -9 |
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 → · Mammoth Lakes 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.
Mammoth Lakes
Temperature & precipitation — 1991–2020 normals computed from 24 years of daily observations at Mammoth Lakes RS, a weather station, inside the city. 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 Mammoth Lakes → · Castries page · Mammoth Lakes page