Weather in Reston in January

General weather information about Reston

Average annual temperature is 14.4 °C

Absolute maximum temperature: 38.2 °C

Absolute minimum temperature: -9.4 °C

Number of sunny days: 175 days

Number of rainy days: 189 days

Number of snow days: 1 day

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

Reston air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)18.123.226.030.929.433.138.233.836.527.624.316.2
Average daytime temperature (°C)9.812.013.122.023.127.431.930.626.721.013.510.3
Average temperature (°C)5.66.57.215.116.621.225.524.521.015.27.75.7
Average night temperature (°C)2.32.22.49.610.715.720.619.516.210.43.12.1
Absolute minimum temperature (°C)-3.1-9.4-5.01.74.711.217.514.910.34.2-5.5-3.9

Reston monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)10.011.012.013.014.014.014.014.013.011.010.09.0
Daylight mean duration (h)9.810.712.013.214.314.914.613.712.411.210.19.5
Daylight minimum duration (h)9.010.011.012.013.014.014.013.011.010.09.09.0
Sunshine mean duration (h)5.36.47.69.310.410.711.910.88.98.67.85.6
Precipitation (mm)77606611449131137571303259157
Sunny days10161418151251214172418
Rainy days20121712161826191614613
Snow days100000000000

Reston - weather forecast by months

Reston weather in januaryReston weather in februaryReston weather in marchReston weather in aprilReston weather in mayReston weather in juneReston weather in julyReston weather in augustReston weather in septemberReston weather in octoberReston weather in novemberReston weather in december

Best time to visit Reston:

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

  • July — 11.9(h)
  • August — 10.8(h)

The largest precipitation sum in Reston is at

  • April — 114(mm)
  • June — 131(mm)
  • July — 137(mm)
  • September — 130(mm)
  • December — 157(mm)

    • Weather forecast in the closest to Reston admin centers

    Weather forecast in the closest towns to Reston

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    Frequently asked questions

    When is the best time to visit Reston?
    The historical weather data above shows the warmest, sunniest and driest months to help you choose the best time to visit Reston.
    What is the weather like in Reston?
    See average temperature, rainfall and daylight hours for Reston by month in the table above.
    How many sunny days does Reston have?
    The monthly weather statistics above show sunshine and rainfall patterns for Reston throughout the year.