Climate

Bethesda weather by month

Average highs, lows, rain and snow for every month, from 30 years of weather records.

Average temperatures

Best time to visit: April, May, June, when highs are mild and rain is lightest.

Month	High	Low	Rain	Snow	Wet days
January	43°F	26°F	3.3 in	2.9 in	10
February	46°F	27°F	3.2 in	1.4 in	9
March	55°F	34°F	4.2 in	0.70 in	12
April	68°F	44°F	3.5 in	0.00 in	11
May	76°F	54°F	4.4 in	0.00 in	12
June	84°F	63°F	4.2 in	0.00 in	10
July	88°F	68°F	5.1 in	0.00 in	10
August	86°F	66°F	4.4 in	0.00 in	10
September	79°F	59°F	4.5 in	0.00 in	10
October	68°F	47°F	4.4 in	0.00 in	9
November	56°F	36°F	3.3 in	0.00 in	9
December	47°F	30°F	3.8 in	0.80 in	11

NOAA U.S. Climate Normals 1991–2020, Dalecarlia Rsvr, Md Us (3.4 mi away, 150 ft). Wet days: days with at least 0.01 in of precipitation.

What is the hottest month in Bethesda?

July, with an average high of 88°F and low of 68°F.

What is the coldest month in Bethesda?

January, with an average low of 26°F and high of 43°F.

When does it rain most in Bethesda?

July is the wettest month, averaging 5.1 in of precipitation; the year totals about 48.3 inches.

Does it snow in Bethesda?

Yes. Snowfall averages about 6 inches a year, mostly in January and February.

What is the best time to visit Bethesda?

For mild weather (highs between 65°F and 85°F) with the least rain, April, May, June.

Where do these numbers come from?

NOAA’s 1991–2020 U.S. Climate Normals for the Dalecarlia Rsvr weather station, 3.4 miles from downtown: 30-year averages, not a forecast.