Zip 51109 (Sioux City, IA) Climate

Sioux City, IA is located in the midwestern region of the United States and enjoys four distinct seasons. Summers are hot and humid with temperatures averaging in the mid-80s Fahrenheit and lows around 65°F. Winters are cold but generally mild, with highs in the 30s and lows often below freezing. Spring and fall are milder with temperatures usually in the 50s to 70s, accompanied by occasional rain showers. Precipitation is generally spread out throughout the year with snowfall occurring mainly from December to early March.

Sioux City (zip 51109), Iowa gets 30 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Sioux City (zip 51109) averages 32 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 208 sunny days per year in Sioux City (zip 51109). The US average is 205 sunny days.

Sioux City (zip 51109) gets some kind of precipitation, on average, 84 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 10
Rain: averages 30 inches of rain a year
Snow: averages 32 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for the 51109 zip code is 7.0 (10=best), which means it is more comfortable than most places in Iowa.

8.9 Summer - 4.6 Winter

June, September and August are the most pleasant months in the 51109 zip code, while January and December are the least comfortable months.

Climate	Sioux City, Iowa	United States
	Unlock	38.1 in.
	32.3 in.	Unlock
	Unlock	106.2 days
	208 days	Unlock
	85.4°	85.8°
	Unlock	21.7°
	7	Unlock
	Unlock	4.3
	1125 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 the 51109 zip code with an average high temperature of 85.4°, which ranks it as warmer than most places in Iowa. In the 51109 zip code, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for the 51109 zip code are September, June and May.

In the 51109 zip code, there are 20.0 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 the 51109 zip code with an average of 9.6°. This is about average compared to other places in Iowa.

In the 51109 zip code, there are 154.3 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Iowa.

In the 51109 zip code, there are 19.1 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 the 51109 zip code 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 the 51109 zip code with 4.1 inches of rain, and the driest month is February with 0.7 inches. The wettest season is Autumn with 37% of yearly precipitation and 8% occurs in Spring, which is the driest season. The annual rainfall of 29.5 inches in the 51109 zip code means that it is one of the driest places in Iowa.

May is the rainiest month in the 51109 zip code with 10.3 days of rain, and February is the driest month with only 4.1 rainy days. There are 83.6 rainy days annually in the 51109 zip code, 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 32.3 inches in the 51109 zip code means that it is snowier than most places in Iowa. December is the snowiest month in the 51109 zip code with 7.3 inches of snow, and 6 months of the year have significant snowfall.

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