What is the hottest month in Farmington?

August is the warmest month in Farmington, with an average high of 83.7°F.

What is the coldest month in Farmington?

December is the coldest month in Farmington, with an average low of 25.0°F.

What month does Farmington get the most rain?

December is typically the wettest month in Farmington, with about 2.90 inches of precipitation.

What plant hardiness zone is Farmington in?

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

Has the climate in Farmington changed recently?

12.3% of Farmington'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.

Farmington, WA

Climate overview — based on NOAA 1991-2020 normals from POTLATCH 3 NNE, ID US.

Dsb Mediterranean continental (warm summer) climate 8a USDA hardiness Zone 8a

Year-round temperatures (°F)

Avg high Avg low

Climate summary

Farmington has an annual average temperature of 46.9°F with about 24.5 inches of precipitation per year and 41.3 inches of snow. The warmest month is August (average high 83.7°F), and the coldest is December (average low 25.0°F). December is typically the wettest month (2.90 in) and August the driest (0.75 in). Snow typically falls from October through May.

Annual swing

35.2°F

warmest to coldest month

Heating need

6,555

HDD/yr

Cooling need

CDD/yr

Best time to visit Farmington

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Climate change signal

All-time records →

45 of 366 (12.3%) of Farmington'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.

1910s		21
1920s		55
1930s		38
1940s		52
1950s		32
1960s		44
1970s		14
1980s		30
1990s		18
2000s		14
2010s		27
2020s		21

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	37.3°F	25.5°F	31.4°F	2.76 in	13.1 in	10
February	41.0°F	26.1°F	33.6°F	2.08 in	7.6 in	9
March	48.0°F	29.8°F	38.9°F	2.80 in	3.1 in	10
April	55.9°F	33.8°F	44.9°F	2.33 in	1.3 in	9
May	65.2°F	39.9°F	52.5°F	2.48 in	0.2 in	8
June	70.6°F	45.0°F	57.8°F	1.60 in	—	7
July	82.0°F	48.9°F	65.4°F	0.84 in	—	4
August	83.7°F	47.8°F	65.8°F	0.75 in	—	3
September	74.1°F	41.6°F	57.9°F	0.95 in	—	4
October	59.0°F	34.6°F	46.8°F	2.16 in	0.2 in	8
November	44.3°F	29.9°F	37.1°F	2.85 in	5.2 in	11
December	36.2°F	25.0°F	30.6°F	2.90 in	10.6 in	10