Johnson County, IA Climate

Johnson County, IA has a humid continental climate. This means that it experiences hot, humid summers and cold, dry winters. The average summer temperature is around 76°F (24°C), while the average winter temperature is 24°F (-4°C). Precipitation is fairly consistent throughout the year and usually ranges between 38 and 42 inches (96-106 cm). Snowfall is also common during the winter months with an average of 22 inches (56 cm) each year. Overall, Johnson County has a moderate climate that supports both agricultural production and outdoor activities.

Johnson County, Iowa gets 37 inches of rain, on average, per year. The US average is 38 inches of rain per year.

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

On average, there are 195 sunny days per year in Johnson County. The US average is 205 sunny days.

Johnson County gets some kind of precipitation, on average, 99 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 13
Rain: averages 37 inches of rain a year
Snow: averages 27 inches of snow a year

Bestplaces Comfort Index

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

8.7 Summer - 4.7 Winter

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

Climate	Johnson, Iowa	United States
	Unlock	38.1 in.
	27.1 in.	Unlock
	Unlock	106.2 days
	195 days	Unlock
	85.0°	85.8°
	Unlock	21.7°
	7	Unlock
	Unlock	4.3
	745 ft.	Unlock

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 Johnson County with an average high temperature of 85.0°, which ranks it as warmer than most places in Iowa. In Johnson County, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Johnson County are September, June and August.

In Johnson County, there are 16.0 days annually when the high temperature is over 90°, which is hotter than most places in Iowa.

January has the coldest nighttime temperatures for Johnson County with an average of 13.1°. This is warmer than most places in Iowa.

In Johnson County, there are 134.5 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Iowa.

In Johnson County, there are 12.6 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Iowa.

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

June is the wettest month in Johnson County with 4.8 inches of rain, and the driest month is January with 1.0 inches. The wettest season is Autumn with 38% of yearly precipitation and 10% occurs in Spring, which is the driest season. The annual rainfall of 36.6 inches in Johnson County means that it is wetter than most places in Iowa.

May is the rainiest month in Johnson County with 11.2 days of rain, and February is the driest month with only 5.6 rainy days. There are 98.8 rainy days annually in Johnson County, which is about average compared to other places in Iowa. The rainiest season is Summer when it rains 29% of the time and the driest is Spring with only a 19% chance of a rainy day.

An annual snowfall of 27.1 inches in Johnson County means that it is less snowy than most places in Iowa. December is the snowiest month in Johnson County with 8.0 inches of snow, and 6 months of the year have significant snowfall.

Reviews for Johnson

See all ()

Write a Review

Start Your Review of Johnson

Jobs

The premier source for comprehensive city data for over 30 years.