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Montréal vs Castries
Comparing Montréal change · Castries change
Castries is the warmer of the two — about 20°C on the annual average; Castries is the wetter, with 933 mm more rain a year, and Castries the sunnier.
How the seasons compare
The differences between Montréal and Castries, in everyday terms.
Summers
Castries has hotter summers
Montréal: Warm
Castries: Warm
Winters
Castries has far milder winters
Montréal: Very cold
Castries: Stays warm
Rain & snow
Castries is wetter
Montréal: Wet
Castries: Very wet
Sky
Castries is sunnier
Montréal: Often cloudy
Castries: Fairly sunny
Month-by-month charts
Temperature
Castries is the warmer of the two — about 20°C on the annual average.
Precipitation
Castries is the wetter — about 933 mm 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 (°C) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Montréal | -5 | -3 | 3 | 12 | 19 | 24 | 26 | 26 | 21 | 13 | 6 | -1 |
| Castries | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 28 | 27 |
| Difference | +32 | +30 | +24 | +16 | +9 | +4 | +2 | +3 | +8 | +15 | +22 | +28 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Montréal | -5 | -3 | 3 | 12 | 19 | 24 |
| Castries | 27 | 27 | 27 | 28 | 28 | 28 |
| Difference | +32 | +30 | +24 | +16 | +9 | +4 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Montréal | 26 | 26 | 21 | 13 | 6 | -1 |
| Castries | 28 | 29 | 29 | 29 | 28 | 27 |
| Difference | +2 | +3 | +8 | +15 | +22 | +28 |
Avg low (°C) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Montréal | -14 | -12 | -6 | 1 | 8 | 14 | 16 | 15 | 11 | 4 | -1 | -9 |
| Castries | 26 | 25 | 25 | 26 | 27 | 27 | 27 | 28 | 28 | 28 | 27 | 26 |
| Difference | +39 | +38 | +32 | +25 | +19 | +13 | +11 | +12 | +17 | +23 | +29 | +35 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Montréal | -14 | -12 | -6 | 1 | 8 | 14 |
| Castries | 26 | 25 | 25 | 26 | 27 | 27 |
| Difference | +39 | +38 | +32 | +25 | +19 | +13 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Montréal | 16 | 15 | 11 | 4 | -1 | -9 |
| Castries | 27 | 28 | 28 | 28 | 27 | 26 |
| Difference | +11 | +12 | +17 | +23 | +29 | +35 |
Precipitation (mm) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Montréal | 83 | 63 | 74 | 92 | 87 | 84 | 94 | 91 | 88 | 97 | 84 | 92 |
| Castries | 113 | 76 | 66 | 90 | 114 | 134 | 216 | 291 | 224 | 246 | 243 | 149 |
| Difference | +30 | +12 | -7 | -2 | +27 | +49 | +122 | +200 | +136 | +149 | +159 | +57 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Montréal | 83 | 63 | 74 | 92 | 87 | 84 |
| Castries | 113 | 76 | 66 | 90 | 114 | 134 |
| Difference | +30 | +12 | -7 | -2 | +27 | +49 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Montréal | 94 | 91 | 88 | 97 | 84 | 92 |
| Castries | 216 | 291 | 224 | 246 | 243 | 149 |
| Difference | +122 | +200 | +136 | +149 | +159 | +57 |
Snowfall (cm)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Montréal | 50 | 44 | 37 | 15 | 0 | 0 | 0 | 0 | 0 | 1 | 14 | 51 |
| Castries | — | — | — | — | — | — | — | — | — | — | — | — |
| Difference | — | — | — | — | — | — | — | — | — | — | — | — |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Montréal | 50 | 44 | 37 | 15 | 0 | 0 |
| Castries | — | — | — | — | — | — |
| Difference | — | — | — | — | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Montréal | 0 | 0 | 0 | 1 | 14 | 51 |
| Castries | — | — | — | — | — | — |
| Difference | — | — | — | — | — | — |
Cloud cover (%) Montréal runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Montréal | 69 | 66 | 65 | 67 | 68 | 64 | 61 | 59 | 59 | 69 | 72 | 73 |
| Castries | 38 | 39 | 42 | 49 | 52 | 59 | 50 | 46 | 51 | 51 | 46 | 41 |
| Difference | -30 | -27 | -23 | -18 | -16 | -6 | -11 | -13 | -8 | -18 | -26 | -32 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Montréal | 69 | 66 | 65 | 67 | 68 | 64 |
| Castries | 38 | 39 | 42 | 49 | 52 | 59 |
| Difference | -30 | -27 | -23 | -18 | -16 | -6 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Montréal | 61 | 59 | 59 | 69 | 72 | 73 |
| Castries | 50 | 46 | 51 | 51 | 46 | 41 |
| Difference | -11 | -13 | -8 | -18 | -26 | -32 |
Relative humidity (%) Varies through the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Montréal | 92 | 91 | 87 | 81 | 78 | 78 | 76 | 73 | 74 | 80 | 85 | 91 |
| Castries | 76 | 75 | 75 | 76 | 77 | 79 | 79 | 79 | 79 | 79 | 79 | 77 |
| Difference | -16 | -16 | -12 | -5 | -1 | — | +3 | +6 | +4 | -1 | -6 | -14 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Montréal | 92 | 91 | 87 | 81 | 78 | 78 |
| Castries | 76 | 75 | 75 | 76 | 77 | 79 |
| Difference | -16 | -16 | -12 | -5 | -1 | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Montréal | 76 | 73 | 74 | 80 | 85 | 91 |
| Castries | 79 | 79 | 79 | 79 | 79 | 77 |
| Difference | +3 | +6 | +4 | -1 | -6 | -14 |
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. Montréal trends → · Castries trends →
Methodology & sources
Montréal
Temperature & precipitation — 1991–2020 normals computed from 22 years of daily observations at Montreal/pierre Elliott Trudeau Intl A, a weather station, about 13 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.
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.
← change Montréal · change Castries → · Montréal page · Castries page