West Lake Stevens climate — normals and trends
West Lake Stevens (United States) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 9.5 °C and it receives 2,066 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 July (17.0 °C on average) and the coldest is January (2.8 °C). Rainfall peaks in November.
West Lake Stevens averages 53 frost days, 4 hot days (≥ 30 °C) and 175 rainy days per year.
West Lake Stevens has warmed by +1.7 °C between 1940 and 2025, or +0.20 °C per decade. This trend is statistically significant.
The number of frost days there went from about 71 to 35 per year over the period.
The hottest day of the period reached 40.1 °C (on 28 June 2021) and the coldest -22.9 °C (on 16 December 1964).
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
West Lake StevensWashington
- coords
- 47.99°, -122.10°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
9.5°C
Average daily high
13.9°C
Average daily low
5.5°C
Annual rainfall
2,066mm
Sunshine / day
8.0h
Mean relative humidity
79%
Average peak wind
11.8km/h
Seasonal range
14.2°C
Frost days (< 0 °C)
53 d/yr
Hot days (≥ 30 °C)
4 d/yr
Rainy days (≥ 1 mm)
175 d/yr
Annual snowfall
97.8 cm
Average feels-like high
12.4 °C
Average feels-like low
3.1 °C
Average peak gust
31.9 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
12.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.7 °C
since 1940
+0.2 °C per decade · r² = 0.41 · 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
40.1 °C
28 June 2021
Coldest day
-22.9 °C
16 December 1964
Wettest day
105 mm
27 October 1967
Windiest day
40.2 km/h
12 December 1995
Strongest gust
110.9 km/h
13 February 1979
Hottest feels-like
44.4 °C
28 June 2021
Coldest feels-like
-28.1 °C
16 December 1964
Snowiest day
28.1 cm
3 February 1971
Sunniest day
15.8 h
17 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 | 6.7 °C | +0.9 °C | 105 mm | -174 mm |
| Feb | 6.9 °C | -1.0 °C | 212 mm | -2 mm |
| Mar | 11.0 °C | +0.9 °C | 277 mm | +67 mm |
| Apr | 15.0 °C | +1.7 °C | 111 mm | -50 mm |
| May | 17.0 °C | +0.2 °C | 84 mm | -28 mm |
| Jun | 20.2 °C | +1.0 °C | 21 mm | -66 mm |
| Jul | 23.4 °C | +0.8 °C | 12 mm | -30 mm |
| Aug | 23.1 °C | +0.5 °C | 129 mm | +76 mm |
| Sep | 20.6 °C | +0.9 °C | 42 mm | -65 mm |
| Oct | 13.7 °C | -0.4 °C | 224 mm | +7 mm |
| Nov | 10.9 °C | +2.2 °C | 311 mm | +16 mm |
| Dec | 8.1 °C | +2.3 °C | 493 mm | +205 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 West Lake Stevens?
West Lake Stevens has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 9.5 °C and it receives 2,066 mm of precipitation per year.
What is the hottest day ever recorded in West Lake Stevens?
The hottest day measured in West Lake Stevens between 1940 and 2025 was 28 June 2021, reaching 40.1 °C.
What is the coldest day in West Lake Stevens?
The coldest day measured in West Lake Stevens between 1940 and 2025 was 16 December 1964, at -22.9 °C.
Does it snow in West Lake Stevens?
Yes. West Lake Stevens gets on average 97.8 cm of snow per year and has around 53 frost days.
Has the climate of West Lake Stevens warmed?
Yes: West Lake Stevens warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in West Lake Stevens?
The wettest day measured in West Lake Stevens between 1940 and 2025 was 27 October 1967, with 105 mm of rain in 24 hours.
What was the windiest day in West Lake Stevens?
The windiest day measured in West Lake Stevens between 1940 and 2025 was 12 December 1995, with winds reaching 40.2 km/h.
What is the warmest month in West Lake Stevens?
The warmest month in West Lake Stevens is July (17.0 °C on average); the coldest is January (2.8 °C).
How much does it rain in West Lake Stevens?
West Lake Stevens receives on average 2,066 mm of precipitation per year, spread over about 175 rainy days.
Is it sunny in West Lake Stevens?
West Lake Stevens gets on average 8.0 hours of sunshine per day, roughly 2,920 hours per year over 1940-2025.
What is the biggest single-day snowfall in West Lake Stevens?
The heaviest 24-hour snowfall measured in West Lake Stevens between 1940 and 2025 was 3 February 1971, with 28.1 cm.
Are there tropical nights in West Lake Stevens?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in West Lake Stevens.
What was the most extreme apparent temperature in West Lake Stevens?
In West Lake Stevens, between 1940 and 2025, the highest apparent temperature reached 44.4 °C on 28 June 2021, and the lowest was -28.1 °C on 16 December 1964.
Compare West Lake Stevens with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around West Lake Stevens