Riverdale, IA Climate


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United States / Iowa / Davenport-Moline-Rock Island Metro Area / Scott County / Riverdale / Zip Codes
Riverdale, IA has a humid continental climate with cold winters and warm summers. The average temperature in the winter is around 28 degrees Fahrenheit while the summer months can reach highs up to 85 degrees Fahrenheit. Precipitation is common in Riverdale with an average of 38 inches per year. Snowfall is moderate throughout the season but can be quite heavy at times. The humidity levels in Riverdale are usually high, reaching upwards of 75 percent during the summer months.

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

Riverdale 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 Riverdale. The US average is 205 sunny days.

Riverdale gets some kind of precipitation, on average, 115 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 15
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 Riverdale is 7.0 (10=best), which means it is more comfortable than most places in Iowa.

8.7 Summer - 4.7 Winter
September, June and May are the most pleasant months in Riverdale, while January and December are the least comfortable months.

  ClimateRiverdale, IowaUnited States
    Unlock38.1 in.
  28.0 in.  Unlock
    Unlock106.2 days
  204 days  Unlock
  85.2°85.8°
    Unlock21.7°
  7  Unlock
    Unlock4.3
  600 ft.  Unlock
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 Riverdale with an average high temperature of 85.2°, which ranks it as warmer than most places in Iowa. In Riverdale, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Riverdale are September, June and August.
In Riverdale, there are 17.2 days annually when the high temperature is over 90°, which is hotter than most places in Iowa.
January has the coldest nighttime temperatures for Riverdale with an average of 15.0°. This is one of the warmest places in Iowa.
In Riverdale, there are 120.5 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Iowa.
In Riverdale, there are 9.2 days annually when the nighttime low temperature falls below zero°, which is one of the warmest places in Iowa.
The humidity is usually comfortable in Riverdale 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 Riverdale with 4.7 inches of rain, and the driest month is January with 1.4 inches. The wettest season is Autumn with 36% of yearly precipitation and 13% occurs in Spring, which is the driest season. The annual rainfall of 37.0 inches in Riverdale means that it is wetter than most places in Iowa.
May is the rainiest month in Riverdale with 11.7 days of rain, and February is the driest month with only 8.0 rainy days. There are 114.8 rainy days annually in Riverdale, which is one of the rainiest places in Iowa. The rainiest season is Summer when it rains 28% of the time and the driest is Spring with only a 23% chance of a rainy day.
An annual snowfall of 28.0 inches in Riverdale means that it is less snowy than most places in Iowa. January is the snowiest month in Riverdale with 8.4 inches of snow, and 6 months of the year have significant snowfall.
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