Herndon weather — 10-day forecast
Temperature, rain, wind and feels-like in Herndon, hour by hour and over 10 days, with the seasonal normal for context.
Now
Reading from 16:00 · NOAA HRRR model
32 °C
Mainly clear
Feels like 34 °C
Next 12 h
- 1632°
- 1732°
- 1831°
- 1925°95 %
- 2024°
- 20:15Sunset
- 2124°
- 2224°12 %
- 2323°94 %
- 0023°82 %
- 0122°
- 0222°
- 0322°
- 0421°
↑ 32°17:00↓ 21°04:00
- Humidity
- 56 %
- Dew point
- 22 °C
- Gusts
- 17.8 km/h
- Clouds
- 26 %
- Pressure
- 1,018 hPa ↓
- UV
- 5 · moderate
- Storm
- severe possible
Grid point 0.9 km away · 3.0 km grid · elevation 115 m
Air quality
The European air-quality index for the city, and the pollutants that set it.
Index set by Ozone
- Ozone
- 113.8µg/m³▲
- PM2.5
- 10.0µg/m³
- PM10
- 10.6µg/m³
- Nitrogen dioxide
- 1.7µg/m³
- Sulphur dioxide
- 0.7µg/m³
- Carbon monoxide
- 202.0µg/m³
- Dust (AOD)
- 0.01
Generated using Copernicus Atmosphere Monitoring Service information
Hour by hour
Step-by-step detail: temperature, wind, cloud cover and ultraviolet.
10 days
Each day's extremes and the chance of rain, out to the end of the run.
Rain probability (> 1 mm): 50 ECMWF ensemble members.
Today
Showers78 %
32°
23°
Sat
Light showers84 %
30°
21°
Sun
Partly cloudy36 %
33°
22°
Mon
Light drizzle18 %
35°
24°
Tue
Thunderstorm62 %
33°
25°
Wed
Light showers16 mm
26°
24°
Thu
Mainly clear
30°
22°
Fri
Light drizzle0 mm
28°
25°
Sat
Thunderstorm2 mm
31°
24°
Sun
Light drizzle1 mm
31°
24°
Gusts · Sun 51.5 km/h
Sun and UV
Sunrise, sunset, day length and ultraviolet intensity.
- Sunrise
- 06:16
- Daylight
- 13 h 59
- Sunset
- 20:15
Radiation · 24.4 MJ/m²
Today in Herndon the mean temperature will be 27.2 °C — +2.6 °C against the normal for 7 August, measured from 1940 to 2026. (1,290 obs.)
Nearby cities
The climate around Herndon