What is the hottest month in Hayward?

July is the warmest month in Hayward, with an average high of 81.8°F.

What is the coldest month in Hayward?

January is the coldest month in Hayward, with an average low of 2.9°F.

What month does Hayward get the most rain?

June is typically the wettest month in Hayward, with about 4.20 inches of precipitation.

What plant hardiness zone is Hayward in?

Hayward is approximately in USDA plant hardiness Zone 5b, based on the average annual extreme minimum temperature.

Has the climate in Hayward changed recently?

22.1% of Hayward'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.

Hayward, WI

Climate overview — based on NOAA 1991-2020 normals from HAYWARD RS, WI US.

Dfb Warm-summer humid continental climate 5b USDA hardiness Zone 5b

Year-round temperatures (°F)

Avg high Avg low

Climate summary

Hayward has an annual average temperature of 43.1°F with about 32.3 inches of precipitation per year and 59.4 inches of snow. The warmest month is July (average high 81.8°F), and the coldest is January (average low 2.9°F). June is typically the wettest month (4.20 in) and January the driest (0.89 in). Snow typically falls from October through May.

Pleasant months

2 / 12

avg high 65–80°F, low ≥ 50°F

Annual swing

55.2°F

warmest to coldest month

Heating need

8,028

HDD/yr

Cooling need

156

CDD/yr

Best time to visit Hayward

Full guide →

Climate change signal

All-time records →

81 of 366 (22.1%) of Hayward'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		36
1900s		25
1910s		52
1920s		17
1930s		32
1940s		8
1950s		0
1960s		0
1970s		1
1980s		0
1990s		26
2000s		62
2010s		50
2020s		57

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	24.0°F	2.9°F	13.5°F	0.89 in	12.0 in	9
February	29.8°F	5.8°F	17.8°F	0.89 in	10.4 in	7
March	42.4°F	17.6°F	30.0°F	1.46 in	10.3 in	8
April	55.8°F	30.1°F	43.0°F	2.70 in	5.5 in	11
May	69.3°F	41.9°F	55.6°F	3.99 in	0.6 in	13
June	77.9°F	51.6°F	64.7°F	4.20 in	—	13
July	81.8°F	55.5°F	68.7°F	4.15 in	—	12
August	79.3°F	53.7°F	66.5°F	3.94 in	—	11
September	71.6°F	47.1°F	59.4°F	3.97 in	—	12
October	57.3°F	35.2°F	46.3°F	3.15 in	0.8 in	12
November	41.4°F	23.4°F	32.4°F	1.67 in	7.3 in	10
December	28.7°F	10.7°F	19.7°F	1.26 in	12.5 in	10