Bremerton climate — normals and trends
Bremerton (United States) has a warm-summer mediterranean climate (Csb) under the Köppen-Geiger classification. Its mean annual temperature is 11.2 °C and it receives 1,356 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 (18.8 °C on average) and the coldest is January (4.9 °C). Rainfall peaks in December.
Bremerton averages 8 frost days, 2 hot days (≥ 30 °C) and 166 rainy days per year.
Bremerton has warmed by +1.4 °C between 1940 and 2025, or +0.17 °C per decade. This trend is statistically significant.
The number of frost days there went from about 11 to 5 per year over the period.
The hottest day of the period reached 36.8 °C (on 26 June 2021) and the coldest -10.5 °C (on 13 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
BremertonWashington
- coords
- 47.57°, -122.63°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
11.2°C
Average daily high
14.2°C
Average daily low
8.5°C
Annual rainfall
1,356mm
Sunshine / day
8.6h
Mean relative humidity
80%
Average peak wind
12.3km/h
Seasonal range
13.9°C
Frost days (< 0 °C)
8 d/yr
Hot days (≥ 30 °C)
2 d/yr
Rainy days (≥ 1 mm)
166 d/yr
Annual snowfall
41.2 cm
Average feels-like high
12.9 °C
Average feels-like low
6.7 °C
Average peak gust
30.4 km/h
Tropical nights (≥ 20 °C)
1 d/yr
Solar radiation
12.6 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.4 °C
since 1940
+0.2 °C per decade · r² = 0.37 · 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
36.8 °C
26 June 2021
Coldest day
-10.5 °C
13 January 1950
Wettest day
88 mm
25 November 1998
Windiest day
47.2 km/h
12 October 1962
Strongest gust
111.6 km/h
26 November 1949
Hottest feels-like
40.1 °C
26 June 2021
Coldest feels-like
-16.6 °C
14 January 1950
Snowiest day
21.6 cm
21 January 1954
Sunniest day
15.7 h
16 June 2004
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 | 7.8 °C | +1.1 °C | 70 mm | -113 mm |
| Feb | 7.1 °C | -1.0 °C | 135 mm | -4 mm |
| Mar | 10.7 °C | +0.7 °C | 160 mm | +23 mm |
| Apr | 14.5 °C | +1.8 °C | 95 mm | -6 mm |
| May | 17.2 °C | +0.9 °C | 81 mm | +7 mm |
| Jun | 20.3 °C | +1.0 °C | 27 mm | -32 mm |
| Jul | 23.6 °C | +0.9 °C | 7 mm | -23 mm |
| Aug | 23.7 °C | +0.8 °C | 33 mm | -4 mm |
| Sep | 21.0 °C | +1.0 °C | 33 mm | -37 mm |
| Oct | 14.6 °C | -0.2 °C | 147 mm | +11 mm |
| Nov | 11.3 °C | +1.4 °C | 174 mm | -21 mm |
| Dec | 9.4 °C | +2.3 °C | 250 mm | +54 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 Bremerton?
Bremerton has a warm-summer mediterranean climate (Köppen Csb). Over 1940-2025, the average annual temperature is 11.2 °C and it receives 1,356 mm of precipitation per year.
What is the hottest day ever recorded in Bremerton?
The hottest day measured in Bremerton between 1940 and 2025 was 26 June 2021, reaching 36.8 °C.
What is the coldest day in Bremerton?
The coldest day measured in Bremerton between 1940 and 2025 was 13 January 1950, at -10.5 °C.
Does it snow in Bremerton?
Yes. Bremerton gets on average 41.2 cm of snow per year and has around 8 frost days.
Has the climate of Bremerton warmed?
Yes: Bremerton warmed by +1.4 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Bremerton?
The wettest day measured in Bremerton between 1940 and 2025 was 25 November 1998, with 88 mm of rain in 24 hours.
What was the windiest day in Bremerton?
The windiest day measured in Bremerton between 1940 and 2025 was 12 October 1962, with winds reaching 47.2 km/h.
What is the warmest month in Bremerton?
The warmest month in Bremerton is August (18.8 °C on average); the coldest is January (4.9 °C).
How much does it rain in Bremerton?
Bremerton receives on average 1,356 mm of precipitation per year, spread over about 166 rainy days.
Is it sunny in Bremerton?
Bremerton gets on average 8.6 hours of sunshine per day, roughly 3,139 hours per year over 1940-2025.
What is the biggest single-day snowfall in Bremerton?
The heaviest 24-hour snowfall measured in Bremerton between 1940 and 2025 was 21 January 1954, with 21.6 cm.
Are there tropical nights in Bremerton?
Yes: Bremerton has on average 1 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Bremerton?
In Bremerton, between 1940 and 2025, the highest apparent temperature reached 40.1 °C on 26 June 2021, and the lowest was -16.6 °C on 14 January 1950.
Compare Bremerton with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Bremerton