Mount Vernon, IA Climate

Mount Vernon, IA has a humid continental climate with warm summers and cold winters. The average high temperature in the summer is around 83 degrees Fahrenheit and the average low temperature in the winter is around 16 degrees Fahrenheit. Rainfall in Mount Vernon ranges from 32 to 37 inches per year, while snowfall ranges from 25 to 30 inches per year. There are an average of 21 days of precipitation each year, with typical rainfall occurring throughout most of the months. Winters usually have periods of cold temperatures and occasional snowfall, while summers tend to be hot and humid with occasional thunderstorms.

Mount Vernon, Iowa gets 36 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Mount Vernon averages 27 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 193 sunny days per year in Mount Vernon. The US average is 205 sunny days.

Mount Vernon gets some kind of precipitation, on average, 108 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 84 degrees
Winter Low: the January low is 11
Rain: averages 36 inches of rain a year
Snow: averages 27 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Mount Vernon is 6.9 (10=best), which means it is more comfortable than most places in Iowa.

8.8 Summer - 4.5 Winter

June, September and August are the most pleasant months in Mount Vernon, while January and December are the least comfortable months.

Climate	Mount Vernon, Iowa	United States
	36.4 in.	38.1 in.
	26.8 in.	27.8 in.
	107.8 days	106.2 days
	193 days	205 days
	84.1°	85.8°
	11.1°	21.7°
	6.9	7
	3.6	4.3
	879 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 Mount Vernon with an average high temperature of 84.1°, which ranks it as about average compared to other places in Iowa. In Mount Vernon, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Mount Vernon are September, June and August.

In Mount Vernon, there are 12.8 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 Mount Vernon with an average of 11.1°. This is warmer than most places in Iowa.

In Mount Vernon, there are 143.9 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Iowa.

In Mount Vernon, there are 16.3 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Iowa.

The humidity is usually comfortable in Mount Vernon 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 Mount Vernon with 4.9 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 36.4 inches in Mount Vernon means that it is wetter than most places in Iowa.

May is the rainiest month in Mount Vernon with 11.7 days of rain, and February is the driest month with only 6.5 rainy days. There are 107.8 rainy days annually in Mount Vernon, which is rainier than most places in Iowa. The rainiest season is Summer when it rains 29% of the time and the driest is Spring with only a 20% chance of a rainy day.

An annual snowfall of 26.8 inches in Mount Vernon means that it is less snowy than most places in Iowa. January is the snowiest month in Mount Vernon with 7.5 inches of snow, and 6 months of the year have significant snowfall.