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Montréal vs Castries
Comparing Montréal change · Castries change
Castries is the warmer of the two — about 36°F on the annual average; Castries is the wetter, with 37 in 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 36°F on the annual average.
Precipitation
Castries is the wetter — about 37 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Montréal | 23 | 26 | 37 | 53 | 66 | 76 | 79 | 78 | 70 | 56 | 43 | 30 |
| Castries | 80 | 80 | 80 | 82 | 83 | 83 | 83 | 84 | 84 | 83 | 83 | 81 |
| Difference | +57 | +54 | +43 | +29 | +16 | +7 | +4 | +6 | +14 | +28 | +39 | +51 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Montréal | 23 | 26 | 37 | 53 | 66 | 76 |
| Castries | 80 | 80 | 80 | 82 | 83 | 83 |
| Difference | +57 | +54 | +43 | +29 | +16 | +7 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Montréal | 79 | 78 | 70 | 56 | 43 | 30 |
| Castries | 83 | 84 | 84 | 83 | 83 | 81 |
| Difference | +4 | +6 | +14 | +28 | +39 | +51 |
Avg low (°F) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Montréal | 8 | 10 | 21 | 34 | 47 | 57 | 62 | 60 | 51 | 40 | 29 | 17 |
| Castries | 78 | 77 | 78 | 79 | 80 | 81 | 81 | 82 | 82 | 82 | 81 | 79 |
| Difference | +70 | +68 | +57 | +45 | +33 | +24 | +20 | +22 | +31 | +42 | +51 | +63 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Montréal | 8 | 10 | 21 | 34 | 47 | 57 |
| Castries | 78 | 77 | 78 | 79 | 80 | 81 |
| Difference | +70 | +68 | +57 | +45 | +33 | +24 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Montréal | 62 | 60 | 51 | 40 | 29 | 17 |
| Castries | 81 | 82 | 82 | 82 | 81 | 79 |
| Difference | +20 | +22 | +31 | +42 | +51 | +63 |
Precipitation (in) Castries runs higher most of the year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Montréal | 3.3 | 2.5 | 2.9 | 3.6 | 3.4 | 3.3 | 3.7 | 3.6 | 3.5 | 3.8 | 3.3 | 3.6 |
| Castries | 4.5 | 3 | 2.6 | 3.5 | 4.5 | 5.3 | 8.5 | 11.5 | 8.8 | 9.7 | 9.6 | 5.9 |
| Difference | +1.2 | +0.5 | -0.3 | -0.1 | +1 | +1.9 | +4.8 | +7.9 | +5.4 | +5.9 | +6.2 | +2.3 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Montréal | 3.3 | 2.5 | 2.9 | 3.6 | 3.4 | 3.3 |
| Castries | 4.5 | 3 | 2.6 | 3.5 | 4.5 | 5.3 |
| Difference | +1.2 | +0.5 | -0.3 | -0.1 | +1 | +1.9 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Montréal | 3.7 | 3.6 | 3.5 | 3.8 | 3.3 | 3.6 |
| Castries | 8.5 | 11.5 | 8.8 | 9.7 | 9.6 | 5.9 |
| Difference | +4.8 | +7.9 | +5.4 | +5.9 | +6.2 | +2.3 |
Snowfall (in)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Montréal | 19.7 | 17.5 | 14.5 | 6 | 0 | 0 | 0 | 0 | 0 | 0.4 | 5.6 | 19.9 |
| Castries | — | — | — | — | — | — | — | — | — | — | — | — |
| Difference | — | — | — | — | — | — | — | — | — | — | — | — |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Montréal | 19.7 | 17.5 | 14.5 | 6 | 0 | 0 |
| Castries | — | — | — | — | — | — |
| Difference | — | — | — | — | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Montréal | 0 | 0 | 0 | 0.4 | 5.6 | 19.9 |
| 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