Hamilton County, IA Climate

The climate in Hamilton, IA County is generally quite pleasant. Summers here are warm and humid, with temperatures averaging between 70-80 degrees Fahrenheit. Winters are cold but mild compared to other parts of the country, with average temperatures around 25-30 degrees Fahrenheit. The county generally receives adequate rainfall year round, helping to keep the local vegetation healthy and lush. Overall, the climate in Hamilton makes it a great place to live or visit throughout the year.

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

Hamilton County averages 30 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 202 sunny days per year in Hamilton County. The US average is 205 sunny days.

Hamilton County gets some kind of precipitation, on average, 92 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 9
Rain: averages 36 inches of rain a year
Snow: averages 30 inches of snow a year

Bestplaces Comfort Index

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

8.9 Summer - 4.5 Winter

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

Climate	Hamilton, Iowa	United States
	Unlock	38.1 in.
	30.0 in.	Unlock
	Unlock	106.2 days
	202 days	Unlock
	84.0°	85.8°
	Unlock	21.7°
	6.9	Unlock
	Unlock	4.3
	1127 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 Hamilton County with an average high temperature of 84.0°, which ranks it as about average compared to other places in Iowa. In Hamilton County, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Hamilton County are June, September and August.

In Hamilton County, there are 12.4 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 Hamilton County with an average of 8.5°. This is colder than most places in Iowa.

In Hamilton County, there are 153.3 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Iowa.

In Hamilton County, there are 20.6 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Iowa.

The humidity is usually comfortable in Hamilton County 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 Hamilton County with 5.6 inches of rain, and the driest month is January with 0.8 inches. The wettest season is Autumn with 42% of yearly precipitation and 8% occurs in Spring, which is the driest season. The annual rainfall of 35.6 inches in Hamilton County means that it is about average compared to other places in Iowa.

May is the rainiest month in Hamilton County with 11.4 days of rain, and February is the driest month with only 4.5 rainy days. There are 92.0 rainy days annually in Hamilton County, which is less rainy than most places in Iowa. The rainiest season is Summer when it rains 30% of the time and the driest is Spring with only a 17% chance of a rainy day.

An annual snowfall of 30.0 inches in Hamilton County means that it is about average compared to other places in Iowa. December is the snowiest month in Hamilton County with 8.3 inches of snow, and 6 months of the year have significant snowfall.

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