Union County, IA Climate

Union IA County has a moderate climate with four distinct seasons. Summers are generally warm and humid with temperatures reaching around 80°F (27°C). Spring and autumn seasons have mild to cool temperatures. Winters are usually cold and snowy, averaging around 20°F (-7°C). Precipitation is abundant throughout the year, totaling over 36 inches (91 cm) annually. The area generally experiences frequent thunderstorms throughout the summer months, although tornadoes are not as common in Union IA County compared to other parts of the Midwest.

Union County, Iowa gets 36 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Union County averages 27 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 202 sunny days per year in Union County. The US average is 205 sunny days.

Union County gets some kind of precipitation, on average, 92 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 85 degrees
Winter Low: the January low is 12
Rain: averages 36 inches of rain a year
Snow: averages 27 inches of snow a year

Bestplaces Comfort Index

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

8.8 Summer - 4.9 Winter

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

Climate	Union, Iowa	United States
	35.9 in.	38.1 in.
	26.7 in.	27.8 in.
	91.6 days	106.2 days
	202 days	205 days
	84.7°	85.8°
	12.1°	21.7°
	7	7
	3.8	4.3
	1216 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 Union County with an average high temperature of 84.7°, which ranks it as warmer than most places in Iowa. In Union County, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Union County are September, June and August.

In Union County, there are 14.6 days annually when the high temperature is over 90°, which is hotter than most places in Iowa.

January has the coldest nighttime temperatures for Union County with an average of 12.1°. This is warmer than most places in Iowa.

In Union County, there are 142.4 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Iowa.

In Union County, there are 14.5 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Iowa.

The humidity is usually comfortable in Union 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 Union County are July, August and June.

May is the wettest month in Union County with 5.0 inches of rain, and the driest month is January with 1.0 inches. The wettest season is Autumn with 37% of yearly precipitation and 10% occurs in Spring, which is the driest season. The annual rainfall of 35.9 inches in Union County means that it is about average compared to other places in Iowa.

May is the rainiest month in Union County with 11.3 days of rain, and January is the driest month with only 4.6 rainy days. There are 91.6 rainy days annually in Union County, which is less rainy than most places in Iowa. The rainiest season is Summer when it rains 31% of the time and the driest is Spring with only a 17% chance of a rainy day.

An annual snowfall of 26.7 inches in Union County means that it is less snowy than most places in Iowa. February is the snowiest month in Union County with 7.3 inches of snow, and 6 months of the year have significant snowfall.

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