What is the hottest month in Coupeville?

August is the warmest month in Coupeville, with an average high of 70.5°F.

What is the coldest month in Coupeville?

February is the coldest month in Coupeville, with an average low of 36.2°F.

What month does Coupeville get the most rain?

November is typically the wettest month in Coupeville, with about 3.12 inches of precipitation.

What plant hardiness zone is Coupeville in?

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

Coupeville, WA

Climate overview — based on NOAA 1991-2020 normals from COUPEVILLE 1 S, WA US.

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

Year-round temperatures (°F)

Avg high Avg low

Climate summary

Coupeville has an annual average temperature of 50.2°F with about 21.7 inches of precipitation per year and 2.5 inches of snow. The warmest month is August (average high 70.5°F), and the coldest is February (average low 36.2°F). November is typically the wettest month (3.12 in) and August the driest (0.70 in). Snow typically falls from March through December.

Pleasant months

3 / 12

avg high 65–80°F, low ≥ 50°F

Annual swing

21.7°F

warmest to coldest month

Heating need

5,319

HDD/yr

Cooling need

CDD/yr

Best time to visit Coupeville

Full guide →

Climate change signal

All-time records →

16 of 366 (4.4%) of Coupeville'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		20
1900s		45
1910s		0
1920s		18
1930s		29
1940s		23
1950s		35
1960s		43
1970s		24
1980s		42
1990s		15
2000s		45
2010s		25
2020s		2

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	44.2°F	36.6°F	40.4°F	2.50 in	—	16
February	46.7°F	36.2°F	41.5°F	1.91 in	—	12
March	50.9°F	38.4°F	44.7°F	1.96 in	0.3 in	14
April	56.5°F	41.7°F	49.1°F	1.87 in	—	12
May	61.7°F	46.6°F	54.2°F	1.73 in	—	9
June	65.2°F	50.2°F	57.7°F	1.31 in	—	9
July	70.1°F	52.7°F	61.4°F	0.78 in	—	4
August	70.5°F	52.7°F	61.6°F	0.70 in	—	4
September	65.8°F	49.4°F	57.6°F	1.22 in	—	8
October	56.4°F	44.5°F	50.5°F	2.08 in	—	12
November	48.6°F	39.6°F	44.1°F	3.12 in	0.6 in	16
December	43.6°F	36.2°F	39.9°F	2.56 in	1.6 in	16