Port Alberni climate — normals and trends
Port Alberni (Canada) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 8.7 °C and it receives 1,986 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is August (16.4 °C on average) and the coldest is January (2.3 °C). Rainfall peaks in December.
Port Alberni averages 43 frost days, 0 hot days (≥ 30 °C) and 172 rainy days per year.
Port Alberni has warmed by +1.8 °C between 1940 and 2025, or +0.22 °C per decade. This trend is statistically significant.
The number of frost days there went from about 64 to 22 per year over the period.
The hottest day of the period reached 35.4 °C (on 28 June 2021) and the coldest -18.0 °C (on 14 January 1950).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
Port AlberniBritish Columbia
- coords
- 49.24°, -124.80°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
8.7°C
Average daily high
11.7°C
Average daily low
5.9°C
Annual rainfall
1,986mm
Sunshine / day
8.2h
Mean relative humidity
83%
Average peak wind
8.6km/h
Seasonal range
14.1°C
Frost days (< 0 °C)
43 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
172 d/yr
Annual snowfall
163.4 cm
Average feels-like high
10.4 °C
Average feels-like low
4.0 °C
Average peak gust
32.5 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
12.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.8 °C
since 1940
+0.2 °C per decade · r² = 0.45 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
35.4 °C
28 June 2021
Coldest day
-18.0 °C
14 January 1950
Wettest day
118 mm
18 January 1968
Windiest day
30.5 km/h
13 February 1979
Strongest gust
132.5 km/h
12 November 2007
Hottest feels-like
37.8 °C
28 June 2021
Coldest feels-like
-23.7 °C
13 January 1950
Snowiest day
36.1 cm
7 February 1969
Sunniest day
15.7 h
15 June 1951
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 5.4 °C | +1.2 °C | 73 mm | -202 mm |
| Feb | 4.5 °C | -1.0 °C | 164 mm | -44 mm |
| Mar | 7.7 °C | +0.5 °C | 290 mm | +88 mm |
| Apr | 12.5 °C | +2.2 °C | 77 mm | -63 mm |
| May | 14.3 °C | -0.1 °C | 89 mm | -3 mm |
| Jun | 18.0 °C | +0.9 °C | 20 mm | -52 mm |
| Jul | 21.7 °C | +1.5 °C | 6 mm | -38 mm |
| Aug | 21.9 °C | +1.6 °C | 54 mm | -2 mm |
| Sep | 18.5 °C | +1.1 °C | 118 mm | +26 mm |
| Oct | 11.8 °C | -0.2 °C | 268 mm | +49 mm |
| Nov | 8.8 °C | +1.6 °C | 199 mm | -92 mm |
| Dec | 6.7 °C | +2.0 °C | 336 mm | +40 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Port Alberni?
Port Alberni has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 8.7 °C and it receives 1,986 mm of precipitation per year.
What is the hottest day ever recorded in Port Alberni?
The hottest day measured in Port Alberni between 1940 and 2025 was 28 June 2021, reaching 35.4 °C.
What is the coldest day in Port Alberni?
The coldest day measured in Port Alberni between 1940 and 2025 was 14 January 1950, at -18.0 °C.
Does it snow in Port Alberni?
Yes. Port Alberni gets on average 163.4 cm of snow per year and has around 43 frost days.
Has the climate of Port Alberni warmed?
Yes: Port Alberni warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Port Alberni?
The wettest day measured in Port Alberni between 1940 and 2025 was 18 January 1968, with 118 mm of rain in 24 hours.
What was the windiest day in Port Alberni?
The windiest day measured in Port Alberni between 1940 and 2025 was 13 February 1979, with winds reaching 30.5 km/h.
What is the warmest month in Port Alberni?
The warmest month in Port Alberni is August (16.4 °C on average); the coldest is January (2.3 °C).
How much does it rain in Port Alberni?
Port Alberni receives on average 1,986 mm of precipitation per year, spread over about 172 rainy days.
Is it sunny in Port Alberni?
Port Alberni gets on average 8.2 hours of sunshine per day, roughly 2,993 hours per year over 1940-2025.
What is the biggest single-day snowfall in Port Alberni?
The heaviest 24-hour snowfall measured in Port Alberni between 1940 and 2025 was 7 February 1969, with 36.1 cm.
Are there tropical nights in Port Alberni?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Port Alberni.
What was the most extreme apparent temperature in Port Alberni?
In Port Alberni, between 1940 and 2025, the highest apparent temperature reached 37.8 °C on 28 June 2021, and the lowest was -23.7 °C on 13 January 1950.
Compare Port Alberni with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Port Alberni