Shelby County, IA Climate

Shelby, IA County has a temperate climate that can vary depending on the season. During the summer months, temperatures are usually warm with high humidity and occasional thunderstorms. In the winter, temperatures typically remain on the cooler side with possible snowfall throughout December and January. Rainfall is abundant in the spring and fall as well as during the summer months. Overall, Shelby experiences mild seasonal changes with short periods of hot or cold weather.

Shelby County, Iowa gets 34 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Shelby County averages 30 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 215 sunny days per year in Shelby County. The US average is 205 sunny days.

Shelby County gets some kind of precipitation, on average, 97 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 84 degrees
Winter Low: the January low is 10
Rain: averages 34 inches of rain a year
Snow: averages 30 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Shelby County is 6.9 (10=best), which means it is more comfortable than most places in Iowa.

8.8 Summer - 4.7 Winter

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

Climate	Shelby, Iowa	United States
	33.8 in.	38.1 in.
	29.6 in.	27.8 in.
	97.2 days	106.2 days
	215 days	205 days
	84.4°	85.8°
	10.3°	21.7°
	6.9	7
	4	4.3
	1336 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 Shelby County with an average high temperature of 84.4°, which ranks it as about average compared to other places in Iowa. In Shelby County, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Shelby County are September, June and August.

In Shelby County, there are 14.5 days annually when the high temperature is over 90°, which is hotter than most places in Iowa.

January has the coldest nighttime temperatures for Shelby County with an average of 10.3°. This is about average compared to other places in Iowa.

In Shelby County, there are 151.5 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Iowa.

In Shelby County, there are 17.5 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Iowa.

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

June is the wettest month in Shelby County with 4.9 inches of rain, and the driest month is January with 0.8 inches. The wettest season is Autumn with 39% of yearly precipitation and 9% occurs in Spring, which is the driest season. The annual rainfall of 33.8 inches in Shelby County means that it is drier than most places in Iowa.

May is the rainiest month in Shelby County with 11.9 days of rain, and January is the driest month with only 5.3 rainy days. There are 97.2 rainy days annually in Shelby County, which is about average compared to other places in Iowa. The rainiest season is Summer when it rains 31% of the time and the driest is Spring with only a 18% chance of a rainy day.

An annual snowfall of 29.6 inches in Shelby County means that it is about average compared to other places in Iowa. December is the snowiest month in Shelby County with 7.6 inches of snow, and 7 months of the year have significant snowfall.

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