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North Cowichan, British Columbia climate
Csb Warm-summer Mediterranean
North Cowichan has a seasonal cool-temperate climate (Warm-summer Mediterranean, Köppen Csb). The hottest month is July with an average daily high near 24°C, while the coldest is January averaging around 2°C at night. Precipitation totals about 982 mm a year and is strongly seasonal — January alone averages 166 mm while July barely receives 20 mm. Light snow accumulates each winter (33 cm of snow per year on average).
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation split into rain and snow · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)North Cowichan climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 7 | 8 | 10 | 14 | 18 | 21 | 24 | 24 | 20 | 14 | 9 | 6 |
| Avg temp (°C) | 4 | 5 | 7 | 10 | 14 | 16 | 19 | 19 | 16 | 11 | 7 | 4 |
| Avg low (°C) | 2 | 2 | 4 | 6 | 9 | 12 | 14 | 14 | 12 | 8 | 5 | 2 |
| Precipitation (mm) | 166 | 90 | 93 | 56 | 40 | 33 | 20 | 26 | 42 | 104 | 155 | 158 |
| Snowfall (cm) | 9 | 7 | 2 | 0 | — | — | — | — | 0 | 0 | 2 | 12 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 7 | 8 | 10 | 14 | 18 | 21 |
| Avg temp (°C) | 4 | 5 | 7 | 10 | 14 | 16 |
| Avg low (°C) | 2 | 2 | 4 | 6 | 9 | 12 |
| Precipitation (mm) | 166 | 90 | 93 | 56 | 40 | 33 |
| Snowfall (cm) | 9 | 7 | 2 | 0 | — | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 24 | 24 | 20 | 14 | 9 | 6 |
| Avg temp (°C) | 19 | 19 | 16 | 11 | 7 | 4 |
| Avg low (°C) | 14 | 14 | 12 | 8 | 5 | 2 |
| Precipitation (mm) | 20 | 26 | 42 | 104 | 155 | 158 |
| Snowfall (cm) | — | — | 0 | 0 | 2 | 12 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 79 | 74 | 76 | 73 | 68 | 66 | 48 | 49 | 53 | 69 | 77 | 80 |
| Relative humidity (%) | 90 | 85 | 83 | 79 | 76 | 75 | 72 | 72 | 76 | 83 | 88 | 90 |
| Wind speed (m/s) | 1.7 | 1.7 | 1.7 | 1.5 | 1.3 | 1.3 | 1.2 | 1.2 | 1.2 | 1.5 | 1.8 | 1.8 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 79 | 74 | 76 | 73 | 68 | 66 |
| Relative humidity (%) | 90 | 85 | 83 | 79 | 76 | 75 |
| Wind speed (m/s) | 1.7 | 1.7 | 1.7 | 1.5 | 1.3 | 1.3 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 48 | 49 | 53 | 69 | 77 | 80 |
| Relative humidity (%) | 72 | 72 | 76 | 83 | 88 | 90 |
| Wind speed (m/s) | 1.2 | 1.2 | 1.2 | 1.5 | 1.8 | 1.8 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Saltspring ST Mary's L, a weather station, about 11 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.