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Herndon
Weather averages
ClimateForecastNovemberDecember >>

Herndon Climate by Month

The graphs below provide an overview of the climate in Herndon (Virginia), the United States of America. They present long-term patterns and averages of weather conditions over a 30-year period.

Average day and night temperature

The mean minimum and maximum temperatures over the year.

Monthly hours of sunshine

The average monthly total hours of sunshine over the year
* Data from: Washington DC, the United States of America (33 KM, 20 Miles).

Daily percent of sunshine

The mean percent of hours of sunhours during the day over the year
* Data from: Washington DC, the United States of America (33 KM, 20 Miles).

Monthly precipitation

The mean monthly precipitation over the year, including rain, snow, hail etc.

Monthly rainy days

The average number of days each month with rain, snow, hail etc.

Average humidity

The mean monthly relative humidity over the year
* Data from: Washington DC, the United States of America (33 KM, 20 Miles).

Forecast for Herndon

Tue   Nov 19
18°C | 8°C
SE 14 km/h
1.1 mm
broken clouds and small chance of slight rain

broken clouds and small chance of slight rain

hourly forecast
Wed   Nov 20
21°C | 8°C
SE 11 km/h
13 mm
partly cloudy and chance of rain

partly cloudy and chance of rain

hourly forecast
Thu   Nov 21
11°C | 3°C
W 22 km/h
4.3 mm
broken clouds and chance of slight rain

broken clouds and chance of slight rain

hourly forecast
5-Day Forecast 10-Day Forecast

The best time of year to visit Herndon in the United States of America

Other facts from our historical weather data:

  • When is summer in Herndon?
    The hottest season / summer takes place in June, July, August and September.
  • Which is the warmest month in Herndon?
    July has an average maximum temperature of 31°C and is the warmest month of the year.
  • Which is the coldest month in Herndon?
    The coldest month is January with an average maximum temperature of 6°C.
  • Which is the wettest month in Herndon?
    October tops the wettest month list with 134 mm of rainfall.
  • Which is the driest month in Herndon?
    February is the driest month with 63 mm of precipitation.
  • Which is the sunniest month in Herndon?
    June is the sunniest month with an average of 282 hours of sunshine.

    • No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.

     

     


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