Okanagan Mission climate — normals and trends
Okanagan Mission (Canada) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 5.6 °C and it receives 651 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 (16.9 °C on average) and the coldest is January (-5.1 °C). Rainfall peaks in November.
Okanagan Mission averages 155 frost days, 2 hot days (≥ 30 °C) and 131 rainy days per year.
Okanagan Mission has warmed by +3.2 °C between 1940 and 2025, or +0.38 °C per decade. This trend is statistically significant.
The number of frost days there went from about 190 to 120 per year over the period.
The hottest day of the period reached 39.8 °C (on 28 June 2021) and the coldest -34.6 °C (on 25 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
Okanagan MissionBritish Columbia
- coords
- 49.82°, -119.48°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
5.6°C
Average daily high
9.9°C
Average daily low
1.6°C
Annual rainfall
651mm
Sunshine / day
9.6h
Mean relative humidity
71%
Average peak wind
8.9km/h
Seasonal range
22.0°C
Frost days (< 0 °C)
155 d/yr
Hot days (≥ 30 °C)
2 d/yr
Rainy days (≥ 1 mm)
131 d/yr
Annual snowfall
184.2 cm
Average feels-like high
7.4 °C
Average feels-like low
-1.2 °C
Average peak gust
30.7 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
14.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+3.2 °C
since 1940
+0.4 °C per decade · r² = 0.64 · 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
39.8 °C
28 June 2021
Coldest day
-34.6 °C
25 January 1950
Wettest day
40 mm
20 October 2003
Windiest day
25.2 km/h
16 October 1991
Strongest gust
90.4 km/h
16 October 1991
Hottest feels-like
39.8 °C
29 June 2021
Coldest feels-like
-39.2 °C
25 January 1950
Snowiest day
20.0 cm
21 December 2020
Sunniest day
16.0 h
7 June 1940
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 | 0.2 °C | +2.6 °C | 29 mm | -35 mm |
| Feb | -1.3 °C | -2.0 °C | 54 mm | +3 mm |
| Mar | 6.8 °C | +2.3 °C | 99 mm | +43 mm |
| Apr | 12.3 °C | +3.4 °C | 39 mm | -7 mm |
| May | 16.1 °C | +1.7 °C | 38 mm | -14 mm |
| Jun | 20.5 °C | +2.5 °C | 31 mm | -20 mm |
| Jul | 24.1 °C | +1.7 °C | 17 mm | -15 mm |
| Aug | 25.1 °C | +2.7 °C | 25 mm | -7 mm |
| Sep | 22.9 °C | +5.1 °C | 20 mm | -24 mm |
| Oct | 10.8 °C | +0.3 °C | 63 mm | -1 mm |
| Nov | 5.9 °C | +3.2 °C | 107 mm | +20 mm |
| Dec | 3.2 °C | +4.5 °C | 152 mm | +77 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 Okanagan Mission?
Okanagan Mission has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 5.6 °C and it receives 651 mm of precipitation per year.
What is the hottest day ever recorded in Okanagan Mission?
The hottest day measured in Okanagan Mission between 1940 and 2025 was 28 June 2021, reaching 39.8 °C.
What is the coldest day in Okanagan Mission?
The coldest day measured in Okanagan Mission between 1940 and 2025 was 25 January 1950, at -34.6 °C.
Does it snow in Okanagan Mission?
Yes. Okanagan Mission gets on average 184.2 cm of snow per year and has around 155 frost days.
Has the climate of Okanagan Mission warmed?
Yes: Okanagan Mission warmed by +3.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Okanagan Mission?
The wettest day measured in Okanagan Mission between 1940 and 2025 was 20 October 2003, with 40 mm of rain in 24 hours.
What was the windiest day in Okanagan Mission?
The windiest day measured in Okanagan Mission between 1940 and 2025 was 16 October 1991, with winds reaching 25.2 km/h.
What is the warmest month in Okanagan Mission?
The warmest month in Okanagan Mission is August (16.9 °C on average); the coldest is January (-5.1 °C).
How much does it rain in Okanagan Mission?
Okanagan Mission receives on average 651 mm of precipitation per year, spread over about 131 rainy days.
Is it sunny in Okanagan Mission?
Okanagan Mission gets on average 9.6 hours of sunshine per day, roughly 3,504 hours per year over 1940-2025.
What is the biggest single-day snowfall in Okanagan Mission?
The heaviest 24-hour snowfall measured in Okanagan Mission between 1940 and 2025 was 21 December 2020, with 20.0 cm.
Are there tropical nights in Okanagan Mission?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Okanagan Mission.
What was the most extreme apparent temperature in Okanagan Mission?
In Okanagan Mission, between 1940 and 2025, the highest apparent temperature reached 39.8 °C on 29 June 2021, and the lowest was -39.2 °C on 25 January 1950.
Compare Okanagan Mission with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Okanagan Mission