The most pleasant months of the year for Johnson County are September, June and August. In Johnson County, there are 4 comfortable months with high temperatures in the range of 70-85°. 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. December is the snowiest month in Johnson County with 8.0 inches of snow, and 6 months of the year have significant snowfall. July is the most humid month, though humidity is low for most of the year.
Today's Weather - Johnson, IA
8 PM PST
|7 DAY FORECAST||DESCRIPTION||HIGH/LOW||WIND|
|Tonight||Haze||62° / 80°||NW 5 mph|
|Sunday Night||Haze then Mostly Clear||56° / 78°||N 5 to 10 mph|
|Monday Night||Mostly Clear||58° / 81°||S 0 to 5 mph|
|Tuesday Night||Mostly Clear||61° / 83°||SW 0 to 5 mph|
|Wednesday Night||Mostly Clear||62° / 83°||S 5 mph|
|Thursday Night||Partly Cloudy||66° / 87°||S 5 to 10 mph|
|Friday Night||Mostly Clear then Slight Chance Showers And Thunderstorms||69° / 88°||S 5 mph|
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 the Johnson County area is 7 (10=best), which means it is more comfortable than most places in Iowa.
7 / 10
A higher score indicates a more comfortable year-round climate. The US average for the comfort index is 7. Our index is based on the total number of days annually within the comfort range of 70-80 degrees, and we also applied a penalty for days of excessive humidity.
Average Monthly High and Low (°F)
Hot, Freezing, Rainy, Snowy Days: Johnson
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.