Weather Averages for Rockville, MD

7-day Forecast / 10-day Forecast

Latitude: 39°6'N, Longitude: 77°6'W, Elevation: 440.0 ft, Distance: 3.05 mi Rockville, MD Averages »

	Unit	Year	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Average temperature over 30 years	°F	53	30	33	43	52	62	70	74	73	65	54	44	35
Average high temperature over 30 years	°F	64	39	43	54	64	73	81	85	83	76	66	55	44
Average low temperature over 30 years	°F	42	21	22	32	40	50	58	63	62	54	42	34	25
Average precipitation over 30 years	in	41.1	2.9	2.8	3.4	3.2	4.2	3.8	3.7	4.0	3.5	3.3	3.3	3.1
Heating degree days over 30 years	days	5093	1063	893	670	378	138	21	-	6	69	325	603	927
Cooling degree days over 30 years	days	889	-	-	-	-	45	183	305	254	90	12	-	-

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