20833 Olney, MD has a humid subtropical climate with hot summers and mild winters. The average high temperature in July is 88 degrees Fahrenheit and the average low temperature in January is 27 degrees Fahrenheit. Precipitation occurs throughout the year, with the wettest months being June through August when thunderstorms are common. Snowfall can occur during any month, but especially from December to March.
Olney (zip 20833), Maryland gets 44 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Olney (zip 20833) averages 16 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 203 sunny days per year in Olney (zip 20833). The US average is 205 sunny days.
Olney (zip 20833) gets some kind of precipitation, on average, 112 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 87 degrees
Winter Low: the January low is 25
Rain: averages 44 inches of rain a year
Snow: averages 16 inches of snow a year