Harrison County, MO Climate

Harrison, MO County has a warm-summer humid continental climate, meaning that summers are typically hot and muggy with occasional severe thunderstorms. Winters in the region can be cold and snowy as temperatures often drop below freezing. Precipitation is fairly consistent year-round with average annual snowfall of just over 27 inches in the lower elevations. In addition, Harrison averages around 207 sunny days each year, providing plenty of opportunity for outdoor activities.

Harrison County, Missouri gets 38 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Harrison County averages 20 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 207 sunny days per year in Harrison County. The US average is 205 sunny days.

Harrison County gets some kind of precipitation, on average, 95 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 15
Rain: averages 38 inches of rain a year
Snow: averages 20 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Harrison County is 7.1 (10=best), which means it is less comfortable than most places in Missouri.

8.4 Summer - 5.2 Winter

September, June and May are the most pleasant months in Harrison County, while January and December are the least comfortable months.

Climate	Harrison, Missouri	United States
	38.3 in.	38.1 in.
	20.2 in.	27.8 in.
	94.6 days	106.2 days
	207 days	205 days
	86.4°	85.8°
	14.7°	21.7°
	7.1	7
	4.5	4.3
	972 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 Harrison County with an average high temperature of 86.4°, which ranks it as one of the coolest places in Missouri. In Harrison County, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Harrison County are September, June and May.

In Harrison County, there are 21.5 days annually when the high temperature is over 90°, which is one of the coolest places in Missouri.

January has the coldest nighttime temperatures for Harrison County with an average of 14.7°. This is one of the coldest places in Missouri.

In Harrison County, there are 130.4 days annually when the nighttime low temperature falls below freezing, which is one of the coldest places in Missouri.

In Harrison County, there are 9.8 days annually when the nighttime low temperature falls below zero°, which is one of the coldest places in Missouri.

The humidity is usually comfortable in Harrison County 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 Harrison County are July, August and June.

May is the wettest month in Harrison County with 5.2 inches of rain, and the driest month is January with 0.9 inches. The wettest season is Autumn with 37% of yearly precipitation and 10% occurs in Spring, which is the driest season. The annual rainfall of 38.3 inches in Harrison County means that it is one of the driest places in Missouri.

May is the rainiest month in Harrison County with 11.5 days of rain, and January is the driest month with only 4.5 rainy days. There are 94.6 rainy days annually in Harrison County, which is less rainy than most places in Missouri. The rainiest season is Summer when it rains 31% of the time and the driest is Spring with only a 17% chance of a rainy day.

An annual snowfall of 20.2 inches in Harrison County means that it is one of the snowiest places in Missouri. December is the snowiest month in Harrison County with 5.5 inches of snow, and 5 months of the year have significant snowfall.

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