What is the hottest month in The Dalles?

July is the warmest month in The Dalles, with an average high of 88.4°F.

What is the coldest month in The Dalles?

January is the coldest month in The Dalles, with an average low of 30.9°F.

What month does The Dalles get the most rain?

December is typically the wettest month in The Dalles, with about 2.68 inches of precipitation.

What plant hardiness zone is The Dalles in?

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

The Dalles, OR

Climate overview — based on NOAA 1991-2020 normals from THE DALLES MUNI AP, WA US.

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

Year-round temperatures (°F)

Avg high Avg low

Climate summary

The Dalles has an annual average temperature of 54.4°F with about 13.7 inches of precipitation per year. The warmest month is July (average high 88.4°F), and the coldest is January (average low 30.9°F). December is typically the wettest month (2.68 in) and July the driest (0.16 in).

Pleasant months

1 / 12

avg high 65–80°F, low ≥ 50°F

Annual swing

38.5°F

warmest to coldest month

Heating need

4,491

HDD/yr

Cooling need

666

CDD/yr

Best time to visit The Dalles

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Monthly averages

Month	Avg High	Avg Low	Avg Temp	Precipitation	Snow	Rainy days
January	42.1°F	30.9°F	36.5°F	2.38 in	—	14
February	48.4°F	32.1°F	40.2°F	1.58 in	—	11
March	56.7°F	36.2°F	46.4°F	1.18 in	—	11
April	64.2°F	41.7°F	53.0°F	0.83 in	—	8
May	73.5°F	49.0°F	61.3°F	0.76 in	—	6
June	79.1°F	55.1°F	67.1°F	0.48 in	—	4
July	88.4°F	61.0°F	74.7°F	0.16 in	—	2
August	87.9°F	60.3°F	74.1°F	0.16 in	—	2
September	80.4°F	52.2°F	66.3°F	0.33 in	—	3
October	65.5°F	42.6°F	54.0°F	1.14 in	—	8
November	50.2°F	35.1°F	42.7°F	1.97 in	—	13
December	41.4°F	31.0°F	36.2°F	2.68 in	—	14