Average Temperatures and Rainfall for Maryland

Average annual temperatures for Maryland (14°C/57°F) are slightly above the average for United States (13°C/55°F).

Average annual rainfall for Maryland (1,267mm/50 inches) is significantly above the average for United States (1,039mm/41 inches).

What is the warmest or hottest month in Maryland?

July is the hottest or warmest month in Maryland, with an average maximum temperate of 31°C/88°F.

What is the coldest or coolest month in Maryland?

January is the coolest or coldest month in Maryland, with an average minimum temperate of -3°C/27°F.

What is the most rainy or wettest month in Maryland?

July is the wettest or most rainy month in Maryland, with an average rainfall of 137mm/5 inches.

What is the least rainy or driest month in Maryland?

January is the driest or least rainy month in Maryland, with an average rainfall of 75mm/3 inches.

What is the warmest or hottest place in Maryland?

Waldorf is the hottest or warmest place in Maryland, with an average maximum temperate of 15°C/59°F.

What is the coldest place in Maryland?

Frederick is the coldest place in Maryland, with an average maximum temperate of 12°C/54°F.

What is the most rainy or wettest place in Maryland?

Gaithersburg is the most rainy or wettest place in Maryland, with an average annual rainfall of 1,387mm/55 inches.

What is the least rainy or driest place in Maryland?

Waldorf is the least rainy or driest place in Maryland, with an average annual rainfall of 1,247mm/49 inches.

Average Monthly Temperatures
Average Maximum Temperature Average Minimum Temperature
Average Monthly Rainfall
PlaceMin TempMax TempAvg TempRainfall
Baltimore 9 19 14 1,341
Bowie 8 19 14 1,269
Columbia 9 19 14 1,341
Dundalk 9 19 14 1,341
Ellicott City 9 19 14 1,341
Frederick 6 18 12 1,379
Gaithersburg 8 17 13 1,387
Germantown 8 17 13 1,387
Glen Burnie 9 19 14 1,341
Silver Spring 8 19 14 1,269
Towson 9 19 14 1,341
Waldorf 11 20 15 1,247