Weather

Olney, MD climate is warm during summer when temperatures tend to be in the 70's and cold during winter when temperatures tend to be in the 30's.

The warmest month of the year is July with an average maximum temperature of 85.40 degrees Fahrenheit, while the coldest month of the year is January with an average minimum temperature of 23.80 degrees Fahrenheit.

Temperature variations between night and day tend to be moderate during summer with a difference that can reach 20 degrees Fahrenheit, and fairly limited during winter with an average difference of 17 degrees Fahrenheit.

The annual average precipitation at Olney is 44.68 Inches. Rainfall is fairly evenly distributed throughout the year. The wettest month of the year is May with an average rainfall of 4.64 Inches.