Cromwell, IA Climate


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United States / Iowa / No Metro Area / Union County / Cromwell / Zip Codes
Cromwell, IA experiences a humid continental climate with hot summers and cold winters. The average temperature throughout the year ranges from 32°F in January to 82°F in July, with an average of 55°F throughout the year. Precipitation is also common throughout the year, with an average annual rainfall of about 39 inches. Snowfall is also common during the winter months and varies from season to season, but generally ranges from 6-9 inches annually.

Cromwell, Iowa gets 35 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Cromwell averages 26 inches of snow per year. The US average is 28 inches of snow per year.

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

Cromwell 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 85 degrees
Winter Low: the January low is 13
Rain: averages 35 inches of rain a year
Snow: averages 26 inches of snow a year

Bestplaces Comfort Index

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

8.7 Summer - 4.9 Winter
June, September and August are the most pleasant months in Cromwell, while January and December are the least comfortable months.

  ClimateCromwell, IowaUnited States
  35.3 in.38.1 in.
  25.6 in.27.8 in.
  96.8 days106.2 days
  205 days205 days
  85.0°85.8°
  12.5°21.7°
  77
  3.84.3
  1289 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 Cromwell with an average high temperature of 85.0°, which ranks it as warmer than most places in Iowa. In Cromwell, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Cromwell are September, June and August.
In Cromwell, there are 15.5 days annually when the high temperature is over 90°, which is hotter than most places in Iowa.
January has the coldest nighttime temperatures for Cromwell with an average of 12.5°. This is warmer than most places in Iowa.
In Cromwell, there are 140.4 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Iowa.
In Cromwell, there are 13.9 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Iowa.
The humidity is usually comfortable in Cromwell 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 Cromwell are July, August and June.
May is the wettest month in Cromwell with 4.9 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 35.3 inches in Cromwell means that it is about average compared to other places in Iowa.
May is the rainiest month in Cromwell with 12.0 days of rain, and January is the driest month with only 4.7 rainy days. There are 96.8 rainy days annually in Cromwell, 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 25.6 inches in Cromwell means that it is less snowy than most places in Iowa. February is the snowiest month in Cromwell with 7.1 inches of snow, and 6 months of the year have significant snowfall.
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