What is the hottest month in Arlington?

July is the warmest month in Arlington, with an average high of 89.5°F.

What is the coldest month in Arlington?

January is the coldest month in Arlington, with an average low of 29.7°F.

What month does Arlington get the most rain?

December is typically the wettest month in Arlington, with about 1.66 inches of precipitation.

What plant hardiness zone is Arlington in?

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

Arlington, OR

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

BSk Semi-arid (cold) climate 8a USDA hardiness Zone 8a

Year-round temperatures (°F)

Avg high Avg low

Climate summary

Arlington has an annual average temperature of 54.3°F with about 9.3 inches of precipitation per year and 5.3 inches of snow. The warmest month is July (average high 89.5°F), and the coldest is January (average low 29.7°F). December is typically the wettest month (1.66 in) and July the driest (0.10 in). Snow typically falls from November through March.

Pleasant months

3 / 12

avg high 65–80°F, low ≥ 50°F

Annual swing

41°F

warmest to coldest month

Heating need

4,629

HDD/yr

Cooling need

795

CDD/yr

Best time to visit Arlington

Full guide →

Climate change signal

All-time records →

17 of 366 (4.6%) of Arlington'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		14
1900s		20
1920s		31
1930s		62
1940s		26
1950s		37
1960s		60
1970s		38
1980s		21
1990s		20
2000s		15
2010s		12
2020s		10

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	29.7°F	35.3°F	1.47 in	2.0 in	11
February	46.9°F	30.6°F	38.7°F	0.98 in	1.2 in	8
March	55.6°F	35.7°F	45.6°F	0.83 in	0.2 in	9
April	63.7°F	42.0°F	52.8°F	0.61 in	—	6
May	73.2°F	50.1°F	61.7°F	0.75 in	—	7
June	79.7°F	56.6°F	68.2°F	0.48 in	—	4
July	89.5°F	63.2°F	76.3°F	0.10 in	—	1
August	88.9°F	62.0°F	75.5°F	0.15 in	—	2
September	80.0°F	53.1°F	66.5°F	0.33 in	—	3
October	65.5°F	42.0°F	53.7°F	0.81 in	0.1 in	7
November	50.4°F	34.4°F	42.4°F	1.13 in	0.4 in	10
December	41.1°F	29.9°F	35.5°F	1.66 in	1.4 in	11