What is the hottest month in Bloomington?

July is the warmest month in Bloomington, with an average high of 81.0°F.

What is the coldest month in Bloomington?

January is the coldest month in Bloomington, with an average low of 7.5°F.

What month does Bloomington get the most rain?

May is typically the wettest month in Bloomington, with about 1.80 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?

12% 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, ID

Climate overview — based on NOAA 1991-2020 normals from LIFTON PUMPING STN, ID 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 41°F with about 11.3 inches of precipitation per year and 37.4 inches of snow. The warmest month is July (average high 81.0°F), and the coldest is January (average low 7.5°F). May is typically the wettest month (1.80 in) and July the driest (0.57 in). Snow typically falls from October through May.

Annual swing

47.9°F

warmest to coldest month

Heating need

8,679

HDD/yr

Cooling need

CDD/yr

Best time to visit Bloomington

Full guide →

Climate change signal

All-time records →

44 of 366 (12%) 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.

1910s		0
1920s		26
1930s		71
1940s		33
1950s		17
1960s		16
1970s		19
1980s		24
1990s		46
2000s		65
2010s		24
2020s		25

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	28.7°F	7.5°F	18.1°F	0.80 in	9.1 in	8
February	31.4°F	7.8°F	19.6°F	0.82 in	8.8 in	9
March	40.4°F	17.8°F	29.1°F	0.83 in	4.1 in	9
April	50.4°F	28.6°F	39.5°F	1.09 in	2.7 in	9
May	60.5°F	37.8°F	49.2°F	1.80 in	0.2 in	10
June	71.3°F	44.9°F	58.1°F	0.92 in	—	6
July	81.0°F	51.0°F	66.0°F	0.57 in	—	4
August	79.9°F	48.0°F	63.9°F	0.76 in	—	5
September	70.0°F	39.2°F	54.6°F	1.09 in	0.1 in	6
October	55.8°F	29.7°F	42.7°F	1.10 in	1.1 in	7
November	40.8°F	20.1°F	30.5°F	0.76 in	4.1 in	8
December	30.4°F	10.4°F	20.4°F	0.75 in	7.2 in	8