Dallas County, Iowa has a humid continental climate. Summers in the county are hot and humid, with July being the hottest month of the year. Winters are cold with temperatures often dropping below freezing. Rainfall in Dallas County is abundant throughout the year with June being the wettest month. Snowfall usually occurs between October and April, usually ranging from trace amounts to around 8 inches that stick on the ground. The average temperature in Dallas County varies greatly depending on the season, ranging from an average low of 18°F in January to an average high of 85°F in July.
Dallas County, Iowa gets 36 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Dallas 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 Dallas County. The US average is 205 sunny days.
Dallas County gets some kind of precipitation, on average, 106 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 11
Rain: averages 36 inches of rain a year
Snow: averages 30 inches of snow a year