Irwin, IA Climate


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United States / Iowa / No Metro Area / Shelby County / Irwin / Zip Codes
Irwin, Iowa is located in the Midwestern United States and experiences a humid continental climate. The summers are typically hot and humid with temperatures averaging in the low 80s, while winters are cold and snowy with temperatures reaching as low as 0 degrees Fahrenheit. Precipitation is spread equally throughout the year with average annual snowfall of about 28 inches. The area has relatively mild weather that is perfect for outdoor activities during all four seasons of the year.

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

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

On average, there are 212 sunny days per year in Irwin. The US average is 205 sunny days.

Irwin 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 Irwin is 6.9 (10=best), which means it is more comfortable than most places in Iowa.

8.8 Summer - 4.6 Winter
June, September and August are the most pleasant months in Irwin, while January and December are the least comfortable months.

  ClimateIrwin, IowaUnited States
  33.5 in.38.1 in.
  29.8 in.27.8 in.
  97.1 days106.2 days
  212 days205 days
  84.2°85.8°
  10.1°21.7°
  6.97
  44.3
  1280 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 Irwin with an average high temperature of 84.2°, which ranks it as about average compared to other places in Iowa. In Irwin, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Irwin are September, June and August.
In Irwin, there are 13.7 days annually when the high temperature is over 90°, which is about average compared to other places in Iowa.
January has the coldest nighttime temperatures for Irwin with an average of 10.1°. This is about average compared to other places in Iowa.
In Irwin, 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 Irwin, there are 17.9 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 Irwin but some summer months can be sticky or muggy. July is the most humid month, though humidity is low for most of the year. The most humid months are July, August and June.
June is the wettest month in Irwin with 4.8 inches of rain, and the driest month is January with 0.8 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 33.5 inches in Irwin means that it is drier than most places in Iowa.
May is the rainiest month in Irwin with 11.7 days of rain, and January is the driest month with only 5.3 rainy days. There are 97.1 rainy days annually in Irwin, which is less rainy than most places in Iowa. The rainiest season is Summer when it rains 30% of the time and the driest is Spring with only a 18% chance of a rainy day.
An annual snowfall of 29.8 inches in Irwin means that it is about average compared to other places in Iowa. December is the snowiest month in Irwin with 7.8 inches of snow, and 7 months of the year have significant snowfall.
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