Harrison County, IA Climate

Harrison, IA County is characterized by a humid continental climate. Summers are warm and humid, with temperatures often reaching the mid-80s Fahrenheit (over 30 degrees Celsius). Winters are cold and dry with average temperatures remaining below freezing for much of the season. Precipitation is distributed evenly throughout the year, with annual rainfall around 38 inches. Snowfall can vary significantly from one year to the next, but averages about 24 inches per year. Overall, Harrison enjoys four distinct seasons and mild weather conditions throughout most of the year.

Harrison County, Iowa gets 33 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Harrison County averages 28 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 214 sunny days per year in Harrison County. The US average is 205 sunny days.

Harrison County gets some kind of precipitation, on average, 89 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.

Weather Highlights

Summer High: the July high is around 86 degrees
Winter Low: the January low is 11
Rain: averages 33 inches of rain a year
Snow: averages 28 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Harrison County is 7.0 (10=best), which means it is more comfortable than most places in Iowa.

8.7 Summer - 4.9 Winter

June, September and August are the most pleasant months in Harrison County, while January and December are the least comfortable months.

Climate	Harrison, Iowa	United States
	32.6 in.	38.1 in.
	28.2 in.	27.8 in.
	88.7 days	106.2 days
	214 days	205 days
	85.8°	85.8°
	10.7°	21.7°
	7	7
	4	4.3
	1170 ft.	2443 ft.

Climate

YOU SHOULD KNOW

Many people confuse weather and climate but they are different. Weather is the conditions of the atmosphere over a short period of time, and climate is how the atmosphere is over long periods of time.

Weather is how the atmosphere is behaving and its effects upon life and human activities. Weather can change from minute-to-minute. Most people think of weather in terms of temperature, humidity, precipitation, cloudiness, brightness, visibility, wind, and atmospheric pressure.

Climate is the description of the long-term pattern of weather in a place. Climate can mean the average weather for a particular region and time period taken over 30 years. Climate is the average of weather over time.

July is the hottest month for Harrison County with an average high temperature of 85.8°, which ranks it as one of the hottest places in Iowa. In Harrison County, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Harrison County are September, June and May.

In Harrison County, there are 20.6 days annually when the high temperature is over 90°, which is one of the hottest places in Iowa.

January has the coldest nighttime temperatures for Harrison County with an average of 10.7°. This is warmer than most places in Iowa.

In Harrison County, there are 151.0 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Iowa.

In Harrison County, there are 16.5 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Iowa.

The humidity is usually comfortable in Harrison County but some summer months can be unpleasant. July is the most humid month, though humidity is low for most of the year. The most humid months in Harrison County are July, August and June.

June is the wettest month in Harrison County with 5.0 inches of rain, and the driest month is January with 0.7 inches. The wettest season is Autumn with 39% of yearly precipitation and 8% occurs in Spring, which is the driest season. The annual rainfall of 32.6 inches in Harrison County means that it is drier than most places in Iowa.

May is the rainiest month in Harrison County with 11.5 days of rain, and January is the driest month with only 4.4 rainy days. There are 88.7 rainy days annually in Harrison County, which is less rainy than most places in Iowa. The rainiest season is Summer when it rains 32% of the time and the driest is Spring with only a 16% chance of a rainy day.

An annual snowfall of 28.2 inches in Harrison County means that it is less snowy than most places in Iowa. December is the snowiest month in Harrison County with 7.1 inches of snow, and 7 months of the year have significant snowfall.

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