What is the hottest month in Bremerton?

August is the warmest month in Bremerton, with an average high of 77.3°F.

What is the coldest month in Bremerton?

December is the coldest month in Bremerton, with an average low of 35.0°F.

What month does Bremerton get the most rain?

December is typically the wettest month in Bremerton, with about 9.92 inches of precipitation.

What plant hardiness zone is Bremerton in?

Bremerton is approximately in USDA plant hardiness Zone 9a, based on the average annual extreme minimum temperature.

Has the climate in Bremerton changed recently?

19.1% of Bremerton's all-time daily heat records were set in the last decade (since 2015), compared to roughly 5% if records were evenly distributed over time.

Bremerton, WA

Climate overview — based on NOAA 1991-2020 normals from BREMERTON, WA US.

Csb Warm-summer Mediterranean climate 9a USDA hardiness Zone 9a

Year-round temperatures (°F)

Avg high Avg low

Climate summary

Bremerton has an annual average temperature of 52.3°F with about 56.9 inches of precipitation per year and 3 inches of snow. The warmest month is August (average high 77.3°F), and the coldest is December (average low 35.0°F). December is typically the wettest month (9.92 in) and July the driest (0.83 in). Snow typically falls from November through February.

Pleasant months

4 / 12

avg high 65–80°F, low ≥ 50°F

Annual swing

25.9°F

warmest to coldest month

Heating need

4,638

HDD/yr

Cooling need

CDD/yr

Best time to visit Bremerton

Full guide →

Climate change signal

All-time records →

70 of 366 (19.1%) of Bremerton's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.

1890s		9
1900s		30
1910s		49
1920s		12
1930s		0
1940s		0
1950s		26
1960s		30
1970s		25
1980s		36
1990s		35
2000s		33
2010s		49
2020s		32

Bars: number of all-time daily heat records still standing that were set in each decade.

Monthly averages

Month	Avg High	Avg Low	Avg Temp	Precipitation	Snow	Rainy days
January	46.6°F	35.6°F	41.1°F	9.28 in	0.6 in	19
February	49.4°F	35.1°F	42.3°F	5.83 in	0.7 in	16
March	53.7°F	37.7°F	45.7°F	6.37 in	0.1 in	19
April	59.0°F	41.0°F	50.0°F	3.86 in	—	16
May	65.8°F	46.5°F	56.2°F	2.36 in	—	12
June	70.2°F	51.1°F	60.7°F	1.61 in	—	11
July	76.5°F	54.6°F	65.6°F	0.83 in	—	6
August	77.3°F	55.1°F	66.2°F	1.09 in	—	6
September	71.9°F	51.1°F	61.5°F	1.80 in	—	9
October	60.6°F	44.7°F	52.6°F	5.14 in	—	16
November	51.2°F	38.7°F	45.0°F	8.84 in	0.3 in	19
December	45.6°F	35.0°F	40.3°F	9.92 in	1.3 in	19