Weather in Herndon, United States
Weather Advisories
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Today's weather summary
The weather in Herndon on Saturday, July 25th, will be clear for most of the day.
Additionally, there will be cloud overcast in the early morning, around 5 am.
Weather information for Herndon, on Saturday, July 25th:
The maximum temperature of the day will be 35°C around 5 pm. The day will have comfortable humidity, with average humidity of 52%, ranging from 34% to a maximum value of 75% at about 8 am. The wind will be breezy, and will get up to 26 km/h at 9 am, blowing from the south-west. The cloud coverage will range from 0% around 1 am to as high as 100% around 4 pm with an average of 36%.
There is no probability for any precipitation throughout the day. The dew point will range from 16°C up to a maximum value of 21°C around 9 am.
The visibility is expected to be good with average visibility of 16 km throughout the day. Atmospheric pressure will be normal with average pressure of 1014 hPa. Sunrise will be at 6:50 am, and sunset at 8:43 pm, making it a total of 13 hours and 53 minutes of daylight.
Air quality forecast for Herndon, on Saturday, July 25th:
On average, the air quality on this day will be moderate, meaning that air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. According to our index, ranging from 0 to 500, the air quality is going to be between values of 40 and 67.
Pollen forecast for Herndon, on Saturday, July 25th:
Tree pollen on this day is expected to have no risk. There's very low risk of weed pollen, and as for grass pollen, this day is expected to have medium risk.
The weather in Herndon on Sunday, July 26th, will be cloudy for most of the day, with clear skies before dawn.
There is also a chance for many clouds in the early morning at about 7 am.
Weather details for Herndon, on Sunday, July 26th:
The maximum temperature during the day will be 35°C at about 8 pm. The day will have comfortable humidity, with average humidity of 47%, ranging from 25% to a maximum value of 70% at about 7 am. The wind will be breezy, and will get up to 26 km/h at 9 am, blowing from the south-west. The cloud coverage will range from 0% around midnight to as high as 100% around 7 pm with an average of 53%.
There is no probability for any precipitation throughout the day. The dew point will range from 11°C up to a maximum value of 19°C around 10 am.
The visibility is expected to be good with average visibility of 16 km throughout the day. Atmospheric pressure will be normal with average pressure of 1013 hPa. Sunrise will be at 6:51 am, and sunset at 8:43 pm. The day will have 13 hours and 52 minutes of daylight.
Air quality forecast for Herndon, on Sunday, July 26th:
On average, the air quality on this day will be moderate, meaning that air quality is acceptable. However, there may be a risk for some people, particularly those who are unusually sensitive to air pollution. According to our index, ranging from 0 to 500, the air quality is going to be between values of 35 and 59.
Pollen forecast for Herndon, on Sunday, July 26th:
Tree pollen on this day is expected to have no risk. There's very low risk of weed pollen, and as for grass pollen, this day is expected to have low risk.
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