Best year time to visit Rockville

General weather information about Rockville

Average annual temperature is 11.4 °C

Absolute maximum temperature: 34.0 °C

Absolute minimum temperature: -24.0 °C

Number of sunny days: 160 days

Number of rainy days: 196 days

Number of snow days: 9 days

* Weather data for Rockville United States is based on climate observations for 2026 year

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Absolute maximum temperature (°C)	12.8	16.1	15.4	31.5	29.5	32.6	32.1	29.5	34.0	28.5	18.6	15.5
Average daytime temperature (°C)	6.3	6.3	8.7	16.9	21.2	24.1	28.6	26.1	23.2	19.0	9.5	8.1
Average temperature (°C)	2.5	1.2	3.6	10.6	14.6	18.2	23.5	21.0	18.5	13.9	4.5	3.7
Average night temperature (°C)	-0.8	-3.5	-0.6	5.6	8.9	13.7	19.3	16.9	14.9	10.0	0.6	0.4
Absolute minimum temperature (°C)	-6.2	-24.0	-4.5	-3.2	3.0	7.3	14.2	12.9	7.5	2.8	-4.8	-6.6

The best time to visit Rockville during the most sunny months:

The largest precipitation sum in Rockville is at

January — 164(mm)

July — 205(mm)

August — 154(mm)

September — 222(mm)

December — 169(mm)

When is the best time to visit Rockville?

The historical weather data above shows the warmest, sunniest and driest months to help you choose the best time to visit Rockville.

What is the weather like in Rockville?

See average temperature, rainfall and daylight hours for Rockville by month in the table above.

How many sunny days does Rockville have?

The monthly weather statistics above show sunshine and rainfall patterns for Rockville throughout the year.