What is the hottest month in Washtucna?

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

What is the coldest month in Washtucna?

December is the coldest month in Washtucna, with an average low of 26.2°F.

What month does Washtucna get the most rain?

November is typically the wettest month in Washtucna, with about 1.41 inches of precipitation.

What plant hardiness zone is Washtucna in?

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

Washtucna, WA

Climate overview — based on NOAA 1991-2020 normals from HATTON 9 SE, WA US.

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

Year-round temperatures (°F)

Avg high Avg low

Climate summary

Washtucna has an annual average temperature of 51.8°F with about 10.8 inches of precipitation per year and 13.5 inches of snow. The warmest month is July (average high 89.5°F), and the coldest is December (average low 26.2°F). November is typically the wettest month (1.41 in) and July the driest (0.23 in). Snow typically falls from November through March.

Pleasant months

1 / 12

avg high 65–80°F, low ≥ 50°F

Annual swing

41.5°F

warmest to coldest month

Heating need

5,244

HDD/yr

Cooling need

504

CDD/yr

Best time to visit Washtucna

Full guide →

Climate change signal

All-time records →

27 of 366 (7.4%) of Washtucna'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.

1900s		72
1910s		58
1920s		22
1930s		32
1940s		22
1950s		20
1960s		22
1970s		26
1980s		25
1990s		22
2000s		17
2010s		10
2020s		18

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	38.7°F	27.0°F	32.8°F	1.24 in	4.0 in	11
February	44.8°F	28.8°F	36.8°F	0.90 in	2.5 in	8
March	54.5°F	33.7°F	44.1°F	1.27 in	0.7 in	8
April	63.0°F	38.2°F	50.6°F	1.05 in	0.1 in	7
May	72.8°F	45.2°F	59.0°F	0.93 in	—	7
June	79.9°F	50.9°F	65.4°F	0.79 in	—	5
July	89.5°F	57.8°F	73.6°F	0.23 in	—	2
August	88.2°F	57.4°F	72.8°F	0.26 in	—	2
September	78.6°F	49.8°F	64.2°F	0.39 in	—	3
October	62.7°F	39.7°F	51.2°F	1.01 in	—	7
November	47.2°F	31.6°F	39.4°F	1.41 in	1.4 in	10
December	38.0°F	26.2°F	32.1°F	1.36 in	4.8 in	12