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Herndon, VA Weather Forecast
Herndon, VA Weather Forecast Dated: 709 AM Wed Sep 16 2026
Expect a very warm period with a mix of sun and clouds and frequent chances of rain over the coming period. generally humid conditions and no major pressure swings will dominate. Isolated storms at times.
Wednesday, September 16, 2026
Mid-Morning
65°F 18°C
Sunny
Mid-Afternoon
84°F 29°C
Partly Cloudy
Early-Evening
78°F 26°C
Partly Cloudy
Warm and summery near 84°F 29°C, sunny in the morning, partly cloudy in the afternoon, and sunny this evening, with steady humidity and steady pressure.
Thursday, September 17, 2026
Mid-Morning
69°F 21°C
Sunny
Mid-Afternoon
86°F 30°C
Sunny
Early-Evening
78°F 26°C
Light Showers
Balmy with temperatures reaching 86°F 30°C, mainly dry until evening showers arrive, with increasing humidity and barometric pressure falling.
Friday, September 18, 2026
Mid-Morning
74°F 23°C
Overcast
Mid-Afternoon
83°F 28°C
Scattered Showers
Early-Evening
76°F 25°C
Scattered Showers
Quite warm around 83°F 28°C, locally heavy downpours at times, with lower humidity and steady pressure. Winds turning from the N to the NE at 8 mph 12 km/h.
Saturday, September 19, 2026
Mid-Morning
70°F 21°C
Cloudy
Mid-Afternoon
76°F 25°C
Overcast
Early-Evening
75°F 24°C
Sunny
Mild temperatures up to 76°F 25°C, cloudy in the morning, overcast in the afternoon, and cloudy this evening, with lower humidity and steady pressure. Winds switching from the ENE to the SE at 8 mph 13 km/h.
Sunday, September 20, 2026
Mid-Morning
71°F 21°C
Overcast
Mid-Afternoon
81°F 27°C
Cloudy
Early-Evening
76°F 24°C
Overcast
Quite warm reaching 81°F 27°C, feeling like 85°F 29°C during peak afternoon, overcast throughout the day, with lower humidity and steady pressure.
Monday, September 21, 2026
Mid-Morning
69°F 21°C
Scattered Showers
Mid-Afternoon
74°F 23°C
Scattered Showers
Early-Evening
72°F 23°C
Overcast
Pleasant near 74°F 23°C, locally heavy downpours at times, with steady humidity and steady pressure.
Tuesday, September 22, 2026
Mid-Morning
71°F 22°C
Light Showers
Mid-Afternoon
77°F 25°C
Light Showers
Early-Evening
74°F 23°C
Light Showers
Comfortable with temperatures reaching 77°F 25°C, rounds of showers expected off and on all day, with steady humidity and steady pressure. Thunderstorms possible in the afternoon and evening. Winds moving from the ESE to the SSW at 8 mph 12 km/h.
Wednesday, September 23, 2026
Mid-Morning
70°F 21°C
Overcast
Mid-Afternoon
80°F 27°C
Scattered Showers
Early-Evening
75°F 24°C
Rain Showers
Quite warm reaching 80°F 27°C, feeling like 84°F 29°C during peak afternoon, scattered downpours possible, with steady humidity and steady pressure.
Thursday, September 24, 2026
Mid-Morning
69°F 20°C
Partly Cloudy
Mid-Afternoon
82°F 28°C
Partly Cloudy
Early-Evening
77°F 25°C
Overcast
Warm temperatures up to 82°F 28°C, sunny in the morning, overcast in the afternoon, and cloudy this evening, with steady humidity and barometric pressure falling. Winds swinging from the W to the S at 9 mph 15 km/h. Gusts up to 21 mph 33 km/h.
Friday, September 25, 2026
Mid-Morning
60°F 16°C
Sunny
Mid-Afternoon
69°F 20°C
Cloudy
Early-Evening
65°F 19°C
Sunny
Mild with a high of 69°F 20°C, sunny in the morning, overcast in the afternoon, and partly cloudy this evening, with steady humidity and steady pressure. Winds blowing from the WNW at 13 mph 21 km/h. Gusts up to 22 mph 35 km/h.
Saturday, September 26, 2026
Mid-Morning
62°F 17°C
Sunny
Mid-Afternoon
76°F 25°C
Sunny
Early-Evening
71°F 21°C
Sunny
Pleasant near 76°F 25°C, sunny throughout the day, with steady humidity and steady pressure. Winds turning from the NW to the NNE at 5 mph 8 km/h.
Sunday, September 27, 2026
Mid-Morning
64°F 18°C
Sunny
Mid-Afternoon
78°F 26°C
Sunny
Early-Evening
73°F 23°C
Sunny
Comfortable with temperatures reaching 78°F 26°C, sunny throughout the day, with lower humidity and steady pressure.
Monday, September 28, 2026
Mid-Morning
66°F 19°C
Sunny
Mid-Afternoon
81°F 27°C
Overcast
Early-Evening
74°F 24°C
Sunny
Quite warm around 81°F 27°C, cloudy in the morning, overcast in the afternoon, and partly cloudy this evening, with lower humidity and barometric pressure falling.
Tuesday, September 29, 2026
Mid-Morning
69°F 21°C
Sunny
Mid-Afternoon
85°F 29°C
Sunny
Early-Evening
77°F 25°C
Sunny
Warm temperatures up to 85°F 29°C, sunny throughout the day, with lower humidity and steady pressure.
Herndon, VA Weather Radar Map
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