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Castries vs Mammoth Lakes
Comparing Castries change · Mammoth Lakes change
Castries is the warmer of the two — about 21°C on the annual average; Castries is the wetter, with 1409 mm 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 21°C on the annual average.
Precipitation
Castries is the wetter — about 1409 mm 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 (°C) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Castries | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 28 | 27 |
| Mammoth Lakes | 5 | 5 | 8 | 10 | 15 | 21 | 26 | 25 | 22 | 16 | 9 | 5 |
| Difference | -22 | -22 | -19 | -17 | -13 | -7 | -3 | -4 | -7 | -13 | -19 | -22 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 27 | 27 | 27 | 28 | 28 | 28 |
| Mammoth Lakes | 5 | 5 | 8 | 10 | 15 | 21 |
| Difference | -22 | -22 | -19 | -17 | -13 | -7 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 28 | 29 | 29 | 29 | 28 | 27 |
| Mammoth Lakes | 26 | 25 | 22 | 16 | 9 | 5 |
| Difference | -3 | -4 | -7 | -13 | -19 | -22 |
Avg low (°C) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Castries | 26 | 25 | 25 | 26 | 27 | 27 | 27 | 28 | 28 | 28 | 27 | 26 |
| Mammoth Lakes | -8 | -8 | -6 | -3 | 1 | 5 | 9 | 8 | 4 | -1 | -5 | -8 |
| Difference | -34 | -34 | -31 | -29 | -26 | -22 | -18 | -20 | -24 | -29 | -32 | -35 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 26 | 25 | 25 | 26 | 27 | 27 |
| Mammoth Lakes | -8 | -8 | -6 | -3 | 1 | 5 |
| Difference | -34 | -34 | -31 | -29 | -26 | -22 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 27 | 28 | 28 | 28 | 27 | 26 |
| Mammoth Lakes | 9 | 8 | 4 | -1 | -5 | -8 |
| Difference | -18 | -20 | -24 | -29 | -32 | -35 |
Precipitation (mm) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Castries | 113 | 76 | 66 | 90 | 114 | 134 | 216 | 291 | 224 | 246 | 243 | 149 |
| Mammoth Lakes | 89 | 85 | 67 | 35 | 34 | 13 | 14 | 12 | 9 | 41 | 60 | 94 |
| Difference | -24 | +9 | +1 | -55 | -80 | -121 | -202 | -279 | -215 | -205 | -183 | -55 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | 113 | 76 | 66 | 90 | 114 | 134 |
| Mammoth Lakes | 89 | 85 | 67 | 35 | 34 | 13 |
| Difference | -24 | +9 | +1 | -55 | -80 | -121 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | 216 | 291 | 224 | 246 | 243 | 149 |
| Mammoth Lakes | 14 | 12 | 9 | 41 | 60 | 94 |
| Difference | -202 | -279 | -215 | -205 | -183 | -55 |
Snowfall (cm)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Castries | — | — | — | — | — | — | — | — | — | — | — | — |
| Mammoth Lakes | 86 | 98 | 72 | 37 | 10 | 1 | 0 | 0 | 0 | 13 | 32 | 98 |
| Difference | — | — | — | — | — | — | — | — | — | — | — | — |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Castries | — | — | — | — | — | — |
| Mammoth Lakes | 86 | 98 | 72 | 37 | 10 | 1 |
| Difference | — | — | — | — | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Castries | — | — | — | — | — | — |
| Mammoth Lakes | 0 | 0 | 0 | 13 | 32 | 98 |
| 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