Best year time to visit Herdon

General weather information about Herdon

Average annual temperature is 14.1 °C

Absolute maximum temperature: 35.4 °C

Absolute minimum temperature: -7.2 °C

Number of sunny days: 175 days

Number of rainy days: 185 days

Number of snow days: 5 days

Look at detailed online map of Herdon

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

Herdon air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)17.323.124.127.930.232.734.335.433.830.025.417.0
Average daytime temperature (°C)9.513.413.519.323.827.930.730.027.720.713.810.4
Average temperature (°C)5.17.07.212.817.321.324.523.720.915.18.05.5
Average night temperature (°C)1.92.32.57.211.815.619.918.715.510.73.82.2
Absolute minimum temperature (°C)-4.9-7.2-7.0-0.34.810.015.812.610.80.2-6.0-6.2

Herdon 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)9.910.812.013.214.214.814.513.612.411.210.19.6
Daylight minimum duration (h)9.010.011.012.013.014.014.013.011.010.09.09.0
Sunshine mean duration (h)4.47.47.79.410.311.011.711.010.47.47.35.1
Precipitation (mm)1251031427454137617227784660
Sunny days8151616161651415192213
Rainy days21131314151426171512817
Snow days202000000001

Herdon - weather forecast by months

Herdon weather in januaryHerdon weather in februaryHerdon weather in marchHerdon weather in aprilHerdon weather in mayHerdon weather in juneHerdon weather in julyHerdon weather in augustHerdon weather in septemberHerdon weather in octoberHerdon weather in novemberHerdon weather in december

Best time to visit Herdon:

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

  • June — 11.0(h)
  • July — 11.7(h)
  • August — 11.0(h)

The largest precipitation sum in Herdon is at

  • January — 125(mm)
  • February — 103(mm)
  • March — 142(mm)
  • June — 137(mm)

    • Weather forecast in the closest to Herdon admin centers

    Weather forecast in the closest towns to Herdon

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    Frequently asked questions

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