Best year time to visit Herndon Heights

General weather information about Herndon Heights

Average annual temperature is 12.7 °C

Absolute maximum temperature: 31.7 °C

Absolute minimum temperature: -10.2 °C

Number of sunny days: 147 days

Number of rainy days: 206 days

Number of snow days: 12 days

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

Herndon Heights air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)19.023.423.127.225.830.731.730.429.526.723.117.3
Average daytime temperature (°C)9.912.712.719.220.624.028.126.424.019.013.39.9
Average temperature (°C)4.66.86.712.615.118.522.721.418.413.46.94.8
Average night temperature (°C)1.22.32.17.310.513.918.517.614.08.92.41.2
Absolute minimum temperature (°C)-8.8-10.2-9.9-0.42.29.215.211.910.02.0-7.8-6.5

Herndon Heights monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)10.011.012.013.014.014.014.014.012.011.010.09.0
Daylight mean duration (h)9.910.812.013.214.214.714.513.612.411.210.29.6
Daylight minimum duration (h)9.010.011.012.013.014.014.013.011.010.09.09.0
Sunshine mean duration (h)4.46.57.39.59.811.111.810.09.88.07.25.1
Precipitation (mm)1111269798129598713647496089
Sunny days9913151098819171713
Rainy days191616142121232311141117
Snow days332100000021

Herndon Heights - weather forecast by months

Herndon Heights weather in januaryHerndon Heights weather in februaryHerndon Heights weather in marchHerndon Heights weather in aprilHerndon Heights weather in mayHerndon Heights weather in juneHerndon Heights weather in julyHerndon Heights weather in augustHerndon Heights weather in septemberHerndon Heights weather in octoberHerndon Heights weather in novemberHerndon Heights weather in december

Best time to visit Herndon Heights:

The best time to visit Herndon Heights during the most sunny months:

  • June — 11.1(h)
  • July — 11.8(h)

The largest precipitation sum in Herndon Heights is at

  • February — 126(mm)
  • May — 129(mm)
  • August — 136(mm)

    • Weather forecast in the closest to Herndon Heights admin centers

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    Frequently asked questions

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