What is the hottest month in North Bonneville?

August is the warmest month in North Bonneville, with an average high of 79.7°F.

What is the coldest month in North Bonneville?

January is the coldest month in North Bonneville, with an average low of 34.3°F.

What month does North Bonneville get the most rain?

December is typically the wettest month in North Bonneville, with about 13.45 inches of precipitation.

What plant hardiness zone is North Bonneville in?

North Bonneville is approximately in USDA plant hardiness Zone 8b, based on the average annual extreme minimum temperature.

Has the climate in North Bonneville changed recently?

14.8% of North Bonneville'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.

North Bonneville, WA

Climate overview — based on NOAA 1991-2020 normals from BONNEVILLE DAM, OR US.

Csb Warm-summer Mediterranean climate 8b USDA hardiness Zone 8b

Year-round temperatures (°F)

Avg high Avg low

Climate summary

North Bonneville has an annual average temperature of 52.8°F with about 80.2 inches of precipitation per year and 10.3 inches of snow. The warmest month is August (average high 79.7°F), and the coldest is January (average low 34.3°F). December is typically the wettest month (13.45 in) and July the driest (0.60 in). Snow typically falls from November through March.

Pleasant months

4 / 12

avg high 65–80°F, low ≥ 50°F

Annual swing

30.1°F

warmest to coldest month

Heating need

4,599

HDD/yr

Cooling need

201

CDD/yr

Best time to visit North Bonneville

Full guide →

Climate change signal

All-time records →

54 of 366 (14.8%) of North Bonneville'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.

1930s		13
1940s		39
1950s		26
1960s		31
1970s		34
1980s		51
1990s		40
2000s		69
2010s		27
2020s		36

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	42.7°F	34.3°F	38.5°F	11.31 in	3.5 in	22
February	47.2°F	35.5°F	41.3°F	8.67 in	3.4 in	18
March	53.3°F	38.0°F	45.6°F	9.13 in	0.3 in	20
April	59.4°F	42.2°F	50.8°F	6.47 in	—	19
May	66.5°F	47.6°F	57.0°F	4.08 in	—	15
June	71.6°F	52.3°F	61.9°F	3.21 in	—	11
July	79.0°F	57.1°F	68.1°F	0.60 in	—	4
August	79.7°F	57.5°F	68.6°F	0.90 in	—	4
September	74.2°F	53.1°F	63.6°F	2.62 in	—	8
October	62.4°F	46.6°F	54.5°F	7.30 in	—	15
November	50.1°F	39.8°F	45.0°F	12.48 in	0.2 in	21
December	42.4°F	34.7°F	38.5°F	13.45 in	2.9 in	22