River Sioux, IA Climate


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United States / Iowa / Omaha-Council Bluffs Metro Area / Harrison County / River Sioux / Zip Codes
River Sioux, IA is known for its warm, humid climate throughout the year. The city experiences hot and humid summers with temperatures often reaching into the high 80s and low 90s Fahrenheit. Winters in River Sioux are relatively mild compared to other areas of Iowa, with temperatures typically staying above freezing during the day and only occasionally dipping below it at night. Rainfall is evenly distributed throughout the year, making River Sioux a very green and lush city.

River Sioux, Iowa gets 32 inches of rain, on average, per year. The US average is 38 inches of rain per year.

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

On average, there are 214 sunny days per year in River Sioux. The US average is 205 sunny days.

River Sioux gets some kind of precipitation, on average, 86 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 86 degrees
Winter Low: the January low is 11
Rain: averages 32 inches of rain a year
Snow: averages 28 inches of snow a year

Bestplaces Comfort Index

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

8.7 Summer - 4.8 Winter
June, September and August are the most pleasant months in River Sioux, while January and December are the least comfortable months.

  ClimateRiver Sioux, IowaUnited States
  31.5 in.38.1 in.
  28.3 in.27.8 in.
  85.7 days106.2 days
  214 days205 days
  86.0°85.8°
  10.6°21.7°
  77
  44.3
  1040 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 River Sioux with an average high temperature of 86.0°, which ranks it as one of the hottest places in Iowa. In River Sioux, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for River Sioux are September, June and May.
In River Sioux, there are 21.5 days annually when the high temperature is over 90°, which is one of the hottest places in Iowa.
January has the coldest nighttime temperatures for River Sioux with an average of 10.6°. This is warmer than most places in Iowa.
In River Sioux, there are 151.1 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Iowa.
In River Sioux, there are 16.7 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Iowa.
The humidity is usually comfortable in River Sioux 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 River Sioux are July, August and June.
June is the wettest month in River Sioux with 4.8 inches of rain, and the driest month is January with 0.6 inches. The wettest season is Autumn with 39% of yearly precipitation and 7% occurs in Spring, which is the driest season. The annual rainfall of 31.5 inches in River Sioux means that it is drier than most places in Iowa.
May is the rainiest month in River Sioux with 10.9 days of rain, and January is the driest month with only 4.1 rainy days. There are 85.7 rainy days annually in River Sioux, which is one of the least rainy places in Iowa. The rainiest season is Summer when it rains 31% of the time and the driest is Spring with only a 16% chance of a rainy day.
An annual snowfall of 28.3 inches in River Sioux means that it is less snowy than most places in Iowa. December is the snowiest month in River Sioux with 6.9 inches of snow, and 6 months of the year have significant snowfall.
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