What is the hottest month in Mosier?

August is the warmest month in Mosier, with an average high of 82.4°F.

What is the coldest month in Mosier?

January is the coldest month in Mosier, with an average low of 30.4°F.

What month does Mosier get the most rain?

December is typically the wettest month in Mosier, with about 5.86 inches of precipitation.

What plant hardiness zone is Mosier in?

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

Has the climate in Mosier changed recently?

9.6% of Mosier'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.

Mosier, OR

Climate overview — based on NOAA 1991-2020 normals from HOOD RVR EXP STN, OR US.

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

Year-round temperatures (°F)

Avg high Avg low

Climate summary

Mosier has an annual average temperature of 51.1°F with about 30.4 inches of precipitation per year and 17.2 inches of snow. The warmest month is August (average high 82.4°F), and the coldest is January (average low 30.4°F). December is typically the wettest month (5.86 in) and July the driest (0.24 in). Snow typically falls from November through March.

Pleasant months

1 / 12

avg high 65–80°F, low ≥ 50°F

Annual swing

33.2°F

warmest to coldest month

Heating need

5,208

HDD/yr

Cooling need

213

CDD/yr

Best time to visit Mosier

Full guide →

Climate change signal

All-time records →

35 of 366 (9.6%) of Mosier'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		4
1900s		37
1910s		28
1920s		32
1930s		35
1940s		25
1950s		15
1960s		21
1970s		21
1980s		25
1990s		44
2000s		42
2010s		17
2020s		20

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	40.8°F	30.4°F	35.6°F	5.23 in	6.9 in	19
February	46.2°F	31.2°F	38.7°F	3.51 in	2.5 in	15
March	53.3°F	34.5°F	43.9°F	3.18 in	0.7 in	15
April	60.0°F	39.2°F	49.6°F	1.84 in	—	13
May	68.4°F	45.6°F	57.0°F	1.32 in	—	9
June	73.6°F	51.1°F	62.3°F	0.82 in	—	6
July	81.7°F	55.5°F	68.6°F	0.24 in	—	2
August	82.4°F	54.7°F	68.5°F	0.24 in	—	2
September	75.9°F	47.3°F	61.6°F	0.71 in	—	4
October	62.8°F	39.1°F	50.9°F	2.64 in	0.1 in	11
November	48.6°F	34.3°F	41.4°F	4.83 in	1.5 in	18
December	40.2°F	30.6°F	35.4°F	5.86 in	5.5 in	19