What is the hottest month in Williams?

July is the warmest month in Williams, with an average high of 84.1°F.

What is the coldest month in Williams?

December is the coldest month in Williams, with an average low of 20.8°F.

What month does Williams get the most rain?

August is typically the wettest month in Williams, with about 3.38 inches of precipitation.

What plant hardiness zone is Williams in?

Williams is approximately in USDA plant hardiness Zone 7b, based on the average annual extreme minimum temperature.

Has the climate in Williams changed recently?

11.7% of Williams'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.

Williams, AZ

Climate overview — based on NOAA 1991-2020 normals from WILLIAMS, AZ US.

Csb Warm-summer Mediterranean climate 7b USDA hardiness Zone 7b

Year-round temperatures (°F)

Avg high Avg low

Climate summary

Williams has an annual average temperature of 50.2°F with about 21.6 inches of precipitation per year and 65.1 inches of snow. The warmest month is July (average high 84.1°F), and the coldest is December (average low 20.8°F). August is typically the wettest month (3.38 in) and June the driest (0.38 in). Snow typically falls from October through April.

Annual swing

34.9°F

warmest to coldest month

Heating need

5,502

HDD/yr

Cooling need

171

CDD/yr

Best time to visit Williams

Full guide →

Climate change signal

All-time records →

43 of 366 (11.7%) of Williams'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		1
1900s		43
1910s		62
1920s		45
1930s		48
1940s		40
1950s		12
1960s		10
1970s		15
1980s		16
1990s		13
2000s		15
2010s		9
2020s		37

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	47.2°F	21.4°F	34.3°F	2.17 in	16.8 in	7
February	49.2°F	22.7°F	35.9°F	2.61 in	12.4 in	6
March	55.6°F	26.8°F	41.2°F	2.00 in	11.1 in	6
April	62.3°F	31.3°F	46.8°F	0.87 in	5.7 in	4
May	71.2°F	39.1°F	55.1°F	0.76 in	0.1 in	4
June	81.8°F	47.9°F	64.9°F	0.38 in	—	3
July	84.1°F	53.6°F	68.8°F	2.98 in	—	11
August	81.5°F	52.3°F	66.9°F	3.38 in	—	13
September	76.4°F	46.6°F	61.5°F	1.59 in	—	7
October	66.7°F	36.0°F	51.3°F	1.59 in	0.7 in	4
November	55.7°F	27.6°F	41.7°F	1.34 in	4.8 in	4
December	47.0°F	20.8°F	33.9°F	1.94 in	13.5 in	6