What is the hottest month in Iowa Falls?

July is the warmest month in Iowa Falls, with an average high of 82.9°F.

What is the coldest month in Iowa Falls?

January is the coldest month in Iowa Falls, with an average low of 8.1°F.

What month does Iowa Falls get the most rain?

June is typically the wettest month in Iowa Falls, with about 6.13 inches of precipitation.

What plant hardiness zone is Iowa Falls in?

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

Has the climate in Iowa Falls changed recently?

11.7% of Iowa Falls'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.

Iowa Falls, IA

Climate overview — based on NOAA 1991-2020 normals from IOWA FALLS, IA US.

Dfa Hot-summer humid continental climate 6a USDA hardiness Zone 6a

Year-round temperatures (°F)

Avg high Avg low

Climate summary

Iowa Falls has an annual average temperature of 46.7°F with about 38.1 inches of precipitation per year and 27.7 inches of snow. The warmest month is July (average high 82.9°F), and the coldest is January (average low 8.1°F). June is typically the wettest month (6.13 in) and January the driest (0.92 in). Snow typically falls from November through April.

Pleasant months

2 / 12

avg high 65–80°F, low ≥ 50°F

Annual swing

55.7°F

warmest to coldest month

Heating need

7,083

HDD/yr

Cooling need

507

CDD/yr

Best time to visit Iowa Falls

Full guide →

Climate change signal

All-time records →

43 of 366 (11.7%) of Iowa Falls'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		18
1900s		3
1910s		20
1920s		28
1930s		92
1940s		29
1950s		25
1960s		16
1970s		6
1980s		24
1990s		25
2000s		26
2010s		24
2020s		30

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	25.7°F	8.1°F	16.9°F	0.92 in	7.1 in	7
February	30.6°F	12.1°F	21.3°F	1.16 in	7.1 in	6
March	43.5°F	24.4°F	33.9°F	2.08 in	4.5 in	8
April	58.3°F	35.3°F	46.8°F	3.80 in	1.3 in	11
May	69.9°F	47.7°F	58.8°F	5.57 in	—	13
June	79.9°F	58.4°F	69.1°F	6.13 in	—	12
July	82.9°F	62.2°F	72.6°F	4.54 in	—	9
August	80.8°F	59.7°F	70.2°F	4.37 in	—	9
September	74.8°F	50.6°F	62.7°F	3.49 in	—	8
October	61.7°F	38.3°F	50.0°F	2.56 in	—	9
November	45.0°F	25.6°F	35.3°F	1.97 in	1.6 in	7
December	31.5°F	14.9°F	23.2°F	1.54 in	6.1 in	7