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Port Alberni, British Columbia climate
Csb Warm-summer Mediterranean
Port Alberni has a seasonal cool-temperate climate (Warm-summer Mediterranean, Köppen Csb). The hottest month is August with an average daily high near 78°F, while the coldest is December averaging around 32°F at night. Precipitation totals about 71 inches a year and is strongly seasonal — November alone averages 12.7 inches while July barely receives 0.90 inches.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 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)Port Alberni climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 40 | 44 | 50 | 57 | 66 | 70 | 78 | 78 | 71 | 57 | 46 | 39 |
| Avg temp (°F) | 36 | 38 | 42 | 47 | 55 | 59 | 65 | 65 | 59 | 49 | 41 | 35 |
| Avg low (°F) | 32 | 31 | 34 | 37 | 43 | 49 | 52 | 52 | 47 | 41 | 35 | 32 |
| Precipitation (in) | 11.8 | 6.7 | 7.9 | 4.0 | 2.1 | 1.5 | 0.9 | 1.4 | 3.4 | 7.4 | 12.7 | 11.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 40 | 44 | 50 | 57 | 66 | 70 |
| Avg temp (°F) | 36 | 38 | 42 | 47 | 55 | 59 |
| Avg low (°F) | 32 | 31 | 34 | 37 | 43 | 49 |
| Precipitation (in) | 11.8 | 6.7 | 7.9 | 4.0 | 2.1 | 1.5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 78 | 78 | 71 | 57 | 46 | 39 |
| Avg temp (°F) | 65 | 65 | 59 | 49 | 41 | 35 |
| Avg low (°F) | 52 | 52 | 47 | 41 | 35 | 32 |
| Precipitation (in) | 0.9 | 1.4 | 3.4 | 7.4 | 12.7 | 11.2 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 75 | 71 | 75 | 72 | 68 | 67 | 51 | 52 | 54 | 68 | 74 | 77 |
| Relative humidity (%) | 94 | 90 | 87 | 82 | 79 | 79 | 79 | 80 | 83 | 88 | 93 | 95 |
| Wind speed (mph) | 1.4 | 1.4 | 1.4 | 1.3 | 1.1 | 1.0 | 1.0 | 1.0 | 1.2 | 1.4 | 1.4 | 1.4 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 75 | 71 | 75 | 72 | 68 | 67 |
| Relative humidity (%) | 94 | 90 | 87 | 82 | 79 | 79 |
| Wind speed (mph) | 1.4 | 1.4 | 1.4 | 1.3 | 1.1 | 1.0 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 51 | 52 | 54 | 68 | 74 | 77 |
| Relative humidity (%) | 79 | 80 | 83 | 88 | 93 | 95 |
| Wind speed (mph) | 1.0 | 1.0 | 1.2 | 1.4 | 1.4 | 1.4 |
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 26 years of daily observations at Port Alberni (aut), 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.