Glen Allen, MO has a humid continental climate with hot and humid summers and cold winters. The average temperature in the summer months is between 75 - 85°F (24 - 29°C) while in winter it can drop to around 20°F (-7°C). Precipitation in Glen Allen is evenly spread throughout the year with an annual average of about 42 inches (107 cm). Snowfall is generally light with an average of around 12 inches (30 cm) annually.
Glen Allen, Missouri gets 48 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Glen Allen averages 11 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 214 sunny days per year in Glen Allen. The US average is 205 sunny days.
Glen Allen gets some kind of precipitation, on average, 98 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 89 degrees
Winter Low: the January low is 22
Rain: averages 48 inches of rain a year
Snow: averages 11 inches of snow a year