What is the hottest month in Bloomington?

July is the warmest month in Bloomington, with an average high of 80.9°F.

What is the coldest month in Bloomington?

January is the coldest month in Bloomington, with an average low of 8.9°F.

What month does Bloomington get the most rain?

June is typically the wettest month in Bloomington, with about 5.93 inches of precipitation.

What plant hardiness zone is Bloomington in?

Bloomington is approximately in USDA plant hardiness Zone 6a, based on the average annual extreme minimum temperature.

Has the climate in Bloomington changed recently?

9.8% of Bloomington'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.

Bloomington, WI

Climate overview — based on NOAA 1991-2020 normals from LANCASTER 4 WSW, WI US.

Dfb Warm-summer humid continental climate 6a USDA hardiness Zone 6a

Year-round temperatures (°F)

Avg high Avg low

Climate summary

Bloomington has an annual average temperature of 46.3°F with about 38.5 inches of precipitation per year and 37.4 inches of snow. The warmest month is July (average high 80.9°F), and the coldest is January (average low 8.9°F). June is typically the wettest month (5.93 in) and January the driest (1.20 in). Snow typically falls from October through May.

Pleasant months

3 / 12

avg high 65–80°F, low ≥ 50°F

Annual swing

54.3°F

warmest to coldest month

Heating need

7,134

HDD/yr

Cooling need

411

CDD/yr

Best time to visit Bloomington

Full guide →

Climate change signal

All-time records →

36 of 366 (9.8%) of Bloomington'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		33
1900s		24
1910s		29
1920s		17
1930s		64
1940s		33
1950s		26
1960s		12
1970s		9
1980s		29
1990s		17
2000s		19
2010s		28
2020s		26

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	25.3°F	8.9°F	17.1°F	1.20 in	10.0 in	8
February	29.9°F	12.9°F	21.4°F	1.29 in	8.9 in	8
March	42.9°F	24.8°F	33.8°F	1.99 in	4.9 in	10
April	56.7°F	36.5°F	46.6°F	3.80 in	1.6 in	11
May	68.3°F	47.9°F	58.1°F	4.39 in	0.2 in	13
June	77.4°F	58.2°F	67.8°F	5.93 in	—	12
July	80.9°F	61.8°F	71.4°F	5.03 in	—	10
August	79.1°F	59.8°F	69.5°F	3.86 in	—	10
September	72.2°F	51.6°F	61.9°F	4.03 in	—	9
October	59.2°F	39.3°F	49.2°F	2.90 in	0.5 in	9
November	43.8°F	27.5°F	35.6°F	2.37 in	2.6 in	8
December	31.0°F	16.0°F	23.5°F	1.70 in	8.7 in	9