Baltimore Average Rainfall by Month

This page shows the average precipitation (including snowfall) in each month of the year in Baltimore, Maryland. It is based on NOAA data for the years 1991–2020.

Average temperature by month

What's the Rainiest Month in Baltimore?

In Baltimore, July has the greatest precipitation of any month. On average, Baltimore gets 4.5 inches of precipitation in July.

However, May is the month with the greatest chance of precipitation. 38.5% of days in May will have at least some rain.

What's the Driest Month in Baltimore?

In Baltimore, February has the least precipitation of any month. On average, Baltimore gets 2.90 inches of precipitation in February.

October is the month with the lowest chance of precipitation. 27.8% of days in October will have measurable rain.

Month	Precipitation	% Chance
January	3.08 in	32.6
February	2.90 in	32.7
March	4.01 in	35.6
April	3.38 in	37.2
May	3.85 in	38.5
June	3.97 in	37.7
July	4.48 in	33.4
August	4.08 in	30.9
September	4.44 in	30.4
October	3.94 in	27.8
November	3.13 in	28.3
December	3.71 in	33.3
Year	44.98 in	33.2

Weather Station Details

Years	Station	Coordinates
1940–2024	Baltimore International Airport	location
1871–1939	Baltimore Customs House	location