Best year time to visit Rockville

General weather information about Rockville

Average annual temperature is 10.3 °C

Absolute maximum temperature: 30.3 °C

Absolute minimum temperature: -15.3 °C

Number of sunny days: 141 days

Number of rainy days: 198 days

Number of snow days: 26 days

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

Rockville air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)15.317.617.126.427.230.329.929.529.625.117.713.0
Average daytime temperature (°C)4.78.27.416.419.122.826.325.121.615.88.85.9
Average temperature (°C)1.42.22.210.213.317.521.319.916.711.64.22.7
Average night temperature (°C)-1.0-2.3-1.65.38.112.917.115.712.88.20.40.1
Absolute minimum temperature (°C)-8.6-15.3-10.3-3.30.37.412.710.98.4-1.4-9.1-6.1

Rockville monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)10.011.012.013.014.015.015.014.013.011.010.09.0
Daylight mean duration (h)9.710.711.913.314.415.014.713.712.511.110.09.4
Daylight minimum duration (h)9.010.011.012.013.014.014.013.011.010.09.09.0
Sunshine mean duration (h)2.96.46.58.510.410.911.510.78.96.86.83.7
Precipitation (mm)1136898907610210911388976580
Sunny days41091521134915141710
Rainy days181517131017272215171017
Snow days935200000034

Rockville - weather forecast by months

Rockville weather in januaryRockville weather in februaryRockville weather in marchRockville weather in aprilRockville weather in mayRockville weather in juneRockville weather in julyRockville weather in augustRockville weather in septemberRockville weather in octoberRockville weather in novemberRockville weather in december

Best time to visit Rockville:

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

  • May — 10.4(h)
  • June — 10.9(h)
  • July — 11.5(h)
  • August — 10.7(h)

Weather forecast in the closest to Rockville admin centers

Weather forecast in the closest towns to Rockville

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Frequently asked questions

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.