Knoxville, IA Climate


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United States / Iowa / No Metro Area / Marion County / Knoxville / Zip Codes
Knoxville, IA has a temperate continental climate with hot, humid summers and cold winters. It experiences a significant amount of precipitation throughout the year, with wetter conditions from April to October and drier conditions during the colder months. Average temperatures range from the low 20s in January to the mid-80s in July and August. Severe thunderstorms occur in Knoxville during summer months, resulting in occasional flooding risks. Snowfall is common during winter months and can vary greatly from season to season.

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

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

On average, there are 204 sunny days per year in Knoxville. The US average is 205 sunny days.

Knoxville gets some kind of precipitation, on average, 93 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 12
Rain: averages 37 inches of rain a year
Snow: averages 28 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Knoxville 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 May are the most pleasant months in Knoxville, while January and December are the least comfortable months.

  ClimateKnoxville, IowaUnited States
  36.6 in.38.1 in.
  27.9 in.27.8 in.
  93.1 days106.2 days
  204 days205 days
  84.8°85.8°
  12.4°21.7°
  77
  44.3
  909 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 Knoxville with an average high temperature of 84.8°, which ranks it as warmer than most places in Iowa. In Knoxville, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Knoxville are September, June and August.
In Knoxville, there are 13.4 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 Knoxville with an average of 12.4°. This is warmer than most places in Iowa.
In Knoxville, there are 136.8 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Iowa.
In Knoxville, there are 13.5 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Iowa.
The humidity is usually comfortable in Knoxville 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 Knoxville are July, August and June.
June is the wettest month in Knoxville with 4.8 inches of rain, and the driest month is January with 1.0 inches. The wettest season is Autumn with 39% of yearly precipitation and 10% occurs in Spring, which is the driest season. The annual rainfall of 36.6 inches in Knoxville means that it is wetter than most places in Iowa.
May is the rainiest month in Knoxville with 11.2 days of rain, and January is the driest month with only 5.0 rainy days. There are 93.1 rainy days annually in Knoxville, 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 27.9 inches in Knoxville means that it is less snowy than most places in Iowa. December is the snowiest month in Knoxville with 7.9 inches of snow, and 6 months of the year have significant snowfall.
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