What is the hottest month in Hanover?

July is the warmest month in Hanover, with an average high of 82.5°F.

What is the coldest month in Hanover?

January is the coldest month in Hanover, with an average low of 15.1°F.

What month does Hanover get the most rain?

May is typically the wettest month in Hanover, with about 4.56 inches of precipitation.

What plant hardiness zone is Hanover in?

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

Has the climate in Hanover changed recently?

8.7% of Hanover'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.

Hanover, MI

Climate overview — based on NOAA 1991-2020 normals from HILLSDALE, MI US.

Dfb Warm-summer humid continental climate 7a USDA hardiness Zone 7a

Year-round temperatures (°F)

Avg high Avg low

Climate summary

Hanover has an annual average temperature of 47.9°F with about 39.5 inches of precipitation per year and 44.1 inches of snow. The warmest month is July (average high 82.5°F), and the coldest is January (average low 15.1°F). May is typically the wettest month (4.56 in) and February the driest (2.25 in). Snow typically falls from November through April.

Pleasant months

2 / 12

avg high 65–80°F, low ≥ 50°F

Annual swing

48.4°F

warmest to coldest month

Heating need

6,552

HDD/yr

Cooling need

387

CDD/yr

Best time to visit Hanover

Full guide →

Climate change signal

All-time records →

32 of 366 (8.7%) of Hanover'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		7
1900s		12
1910s		34
1920s		37
1930s		83
1940s		31
1950s		26
1960s		14
1970s		11
1980s		23
1990s		19
2000s		22
2010s		30
2020s		17

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	30.6°F	15.1°F	22.8°F	2.77 in	13.3 in	15
February	33.9°F	16.4°F	25.1°F	2.25 in	11.5 in	12
March	44.3°F	24.5°F	34.4°F	2.40 in	5.2 in	11
April	57.7°F	35.0°F	46.3°F	3.68 in	1.5 in	14
May	69.3°F	46.8°F	58.1°F	4.56 in	—	14
June	78.5°F	56.5°F	67.5°F	3.91 in	—	12
July	82.5°F	59.9°F	71.2°F	3.62 in	—	10
August	80.1°F	58.3°F	69.2°F	3.93 in	—	11
September	73.9°F	50.3°F	62.1°F	3.58 in	—	10
October	61.1°F	39.6°F	50.4°F	3.43 in	0.1 in	13
November	47.2°F	30.1°F	38.7°F	2.97 in	3.4 in	13
December	35.7°F	21.8°F	28.7°F	2.44 in	9.1 in	14