Current Conditions
Herndon, Virginia
Wind
NE 9 mph15 km/h
Humidity
92%
Cloud Cover
100%
As of Wednesday, September 23, 2026 at 1:49 AM EDT
Today's Outlook
Day
Overcast and mild, with a high of 65°F18°C and morning low of 56°F13°C. Breezy from the NE at 9 to 10 mph15 to 16 km/h. 72% chance of light rain in the morning.
Night
Overcast, with a low around 57°F14°C. Breezy from the NE at 9 mph14 km/h. 92% chance of light rain overnight.
7-Day Forecast
| Day | Condition | High (°F) | Low (°F) | Precip (mm) | Cloud Cover (%) | Wind (mph) | |
|---|---|---|---|---|---|---|---|
| Light Rain | High 65°F18°C | Low 56°F13°C | Precip 0.19 in4.8 mm92% | Cloud 88% | Wind NE 9 mph14 km/h | Wednesday: Overcast and mild, with a high of 65°F18°C and morning low of 56°F13°C. Breezy from the NE at 9 to 10 mph15 to 16 km/h. 72% chance of light rain in the morning. Wednesday Night: Overcast, with a low around 57°F14°C. Breezy from the NE at 9 mph14 km/h. 92% chance of light rain overnight. | |
| Partly Cloudy | High 67°F19°C | Low 54°F12°C | Precip 0 in0 mm— | Cloud 80% | Wind NNE 8 mph12 km/h | Thursday: Overcast and mild, with a high of 67°F19°C and morning low of 54°F12°C. Breezy from the NE at 9 to 10 mph14 to 15 km/h. Dry air. Thursday Night: Mostly cloudy, with a low around 54°F12°C. Breezy from the NNE at 7 to 9 mph11 to 14 km/h. | |
| Partly Cloudy | High 75°F24°C | Low 51°F11°C | Precip 0 in0 mm— | Cloud 51% | Wind N 10 mph15 km/h | Friday: Partly cloudy and warm, with a high of 75°F24°C and morning low of 52°F11°C. Breezy from the N at 10 to 11 mph17 to 18 km/h. Dry air. Friday Night: Mostly cloudy, with a low around 51°F11°C. Breezy from the NNW at 9 to 10 mph14 to 16 km/h. | |
| Drizzle | High 73°F23°C | Low 57°F14°C | Precip 0.05 in1.2 mm19% | Cloud 42% | Wind NNW 10 mph17 km/h | Saturday: Partly cloudy and warm, with a high of 73°F23°C and morning low of 58°F14°C. Breezy from the NNW at 11 to 12 mph18 to 19 km/h. 17% chance of drizzle in the afternoon. Dry air. Saturday Night: Partly cloudy, with a low around 57°F14°C. Breezy from the NNW at 10 mph16 km/h. 19% chance of drizzle in the evening. | |
| Drizzle | High 68°F20°C | Low 60°F15°C | Precip 0.11 in2.8 mm29% | Cloud 80% | Wind NW 9 mph15 km/h | Sunday: Overcast and warm, with a high of 68°F20°C and morning low of 60°F15°C. Breezy from the NW at 10 to 11 mph16 to 17 km/h. 29% chance of drizzle throughout the day. Sunday Night: Mostly cloudy, with a low around 60°F15°C. Breezy from the NW at 8 to 9 mph14 to 15 km/h. 23% chance of drizzle throughout the night. | |
| Drizzle | High 72°F22°C | Low 60°F16°C | Precip 0.02 in0.4 mm12% | Cloud 75% | Wind NW 6 mph9 km/h | Monday: Overcast and warm, with a high of 72°F22°C and morning low of 61°F16°C. Breezy from the NW at 6 to 7 mph10 to 12 km/h. Monday Night: Mostly cloudy, with a low around 60°F16°C. Light wind from the NW around 5 mph9 km/h. 12% chance of drizzle overnight. | |
| Partly Cloudy | High 77°F25°C | Low 60°F16°C | Precip 0 in0.1 mm1% | Cloud 44% | Wind WNW 4 mph6 km/h | Tuesday: Partly cloudy and warm, with a high of 77°F25°C and morning low of 60°F16°C. Light wind from the WNW around 3 mph5 km/h. Tuesday Night: Partly cloudy, with a low around 60°F16°C. Light wind from the W around 4 mph6 km/h. |
15-Day Forecast
| Day | High | Low | Precip | Cloud Cover | Condition | Wind | |
|---|---|---|---|---|---|---|---|
| WednesdaySep 23 | 65°F18°C | 56°F13°C | 0.19 in4.8 mm· 92% | 88% | Light Rain | NE 9 mph14 km/h | |
DayOvercast and mild, with a high of 65°F18°C and morning low of 56°F13°C. Breezy from the NE at 9 to 10 mph15 to 16 km/h. 72% chance of light rain in the morning. NightOvercast, with a low around 57°F14°C. Breezy from the NE at 9 mph14 km/h. 92% chance of light rain overnight. | |||||||
| ThursdaySep 24 | 67°F19°C | 54°F12°C | 0 in0 mm· — | 80% | Partly Cloudy | NNE 8 mph12 km/h | |
DayOvercast and mild, with a high of 67°F19°C and morning low of 54°F12°C. Breezy from the NE at 9 to 10 mph14 to 15 km/h. Dry air. NightMostly cloudy, with a low around 54°F12°C. Breezy from the NNE at 7 to 9 mph11 to 14 km/h. | |||||||
| FridaySep 25 | 75°F24°C | 51°F11°C | 0 in0 mm· — | 51% | Partly Cloudy | N 10 mph15 km/h | |
DayPartly cloudy and warm, with a high of 75°F24°C and morning low of 52°F11°C. Breezy from the N at 10 to 11 mph17 to 18 km/h. Dry air. NightMostly cloudy, with a low around 51°F11°C. Breezy from the NNW at 9 to 10 mph14 to 16 km/h. | |||||||
| SaturdaySep 26 | 73°F23°C | 57°F14°C | 0.05 in1.2 mm· 19% | 42% | Drizzle | NNW 10 mph17 km/h | |
DayPartly cloudy and warm, with a high of 73°F23°C and morning low of 58°F14°C. Breezy from the NNW at 11 to 12 mph18 to 19 km/h. 17% chance of drizzle in the afternoon. Dry air. NightPartly cloudy, with a low around 57°F14°C. Breezy from the NNW at 10 mph16 km/h. 19% chance of drizzle in the evening. | |||||||
| SundaySep 27 | 68°F20°C | 60°F15°C | 0.11 in2.8 mm· 29% | 80% | Drizzle | NW 9 mph15 km/h | |
DayOvercast and warm, with a high of 68°F20°C and morning low of 60°F15°C. Breezy from the NW at 10 to 11 mph16 to 17 km/h. 29% chance of drizzle throughout the day. NightMostly cloudy, with a low around 60°F15°C. Breezy from the NW at 8 to 9 mph14 to 15 km/h. 23% chance of drizzle throughout the night. | |||||||
| MondaySep 28 | 72°F22°C | 60°F16°C | 0.02 in0.4 mm· 12% | 75% | Drizzle | NW 6 mph9 km/h | |
DayOvercast and warm, with a high of 72°F22°C and morning low of 61°F16°C. Breezy from the NW at 6 to 7 mph10 to 12 km/h. NightMostly cloudy, with a low around 60°F16°C. Light wind from the NW around 5 mph9 km/h. 12% chance of drizzle overnight. | |||||||
| TuesdaySep 29 | 77°F25°C | 60°F16°C | 0 in0.1 mm· 1% | 44% | Partly Cloudy | WNW 4 mph6 km/h | |
DayPartly cloudy and warm, with a high of 77°F25°C and morning low of 60°F16°C. Light wind from the WNW around 3 mph5 km/h. NightPartly cloudy, with a low around 60°F16°C. Light wind from the W around 4 mph6 km/h. | |||||||
| WednesdaySep 30 | 80°F27°C | 59°F15°C | 0.02 in0.5 mm· 9% | 47% | Partly Cloudy | SSE 5 mph9 km/h | |
DayMostly cloudy and warm, with a high of 80°F27°C and morning low of 60°F16°C. Light wind from the SSE around 5 mph8 km/h. NightPartly cloudy, with a low around 59°F15°C. Breezy from the SSE at 6 to 7 mph9 to 11 km/h. | |||||||
| ThursdayOct 1 | 79°F26°C | 65°F18°C | 0.16 in4 mm· 25% | 65% | Showers | S 6 mph10 km/h | |
DayMostly cloudy and warm, with a high of 79°F26°C and morning low of 65°F18°C. Breezy from the S at 6 to 7 mph10 to 11 km/h. 25% chance of showers throughout the day. NightMostly cloudy, with a low around 65°F18°C. Breezy from the S at 7 mph11 km/h. 20% chance of showers throughout the night. | |||||||
| FridayOct 2 | 76°F24°C | 63°F17°C | 0.16 in4.1 mm· 23% | 60% | Showers | W 6 mph10 km/h | |
DayMostly cloudy and warm, with a high of 76°F24°C and morning low of 63°F17°C. Breezy from the W at 6 to 7 mph10 to 11 km/h. 23% chance of showers throughout the day. NightMostly cloudy, with a low around 63°F17°C. Light wind from the WSW around 6 mph10 km/h. 19% chance of showers throughout the night. | |||||||
| SaturdayOct 3 | 74°F23°C | 60°F15°C | 0.17 in4.4 mm· 19% | 57% | Showers | SW 6 mph10 km/h | |
DayMostly cloudy and warm, with a high of 74°F23°C and morning low of 60°F15°C. Light wind from the WSW around 6 mph10 km/h. 19% chance of showers throughout the day. NightMostly cloudy, with a low around 60°F16°C. Light wind from the SSW around 6 mph9 km/h. 19% chance of showers throughout the night. | |||||||
| SundayOct 4 | 75°F24°C | 60°F16°C | 0.15 in3.9 mm· 20% | 58% | Showers | SSW 6 mph9 km/h | |
DayMostly cloudy and warm, with a high of 75°F24°C and morning low of 60°F16°C. Light wind from the SW around 6 mph9 km/h. 20% chance of showers throughout the day. NightMostly cloudy, with a low around 60°F16°C. Light wind from the SSW around 6 mph10 km/h. 17% chance of drizzle throughout the night. | |||||||
| MondayOct 5 | 73°F23°C | 60°F15°C | 0.14 in3.6 mm· 19% | 57% | Showers | WNW 6 mph10 km/h | |
DayMostly cloudy and warm, with a high of 73°F23°C and morning low of 60°F15°C. Light wind from the WNW around 6 mph10 km/h. 18% chance of drizzle throughout the day. NightMostly cloudy, with a low around 60°F16°C. Light wind from the W around 6 mph10 km/h. 19% chance of showers throughout the night. | |||||||
| TuesdayOct 6 | 71°F21°C | 57°F14°C | 0.1 in2.6 mm· 17% | 53% | Showers | WNW 6 mph10 km/h | |
DayMostly cloudy and warm, with a high of 71°F21°C and morning low of 57°F14°C. Breezy from the WNW at 7 mph10 km/h. 16% chance of drizzle throughout the day. NightMostly cloudy, with a low around 57°F14°C. Light wind from the WNW around 6 mph10 km/h. 17% chance of showers throughout the night. | |||||||
| WednesdayOct 7 | 69°F21°C | 55°F13°C | 0.14 in3.6 mm· 16% | 53% | Showers | WNW 6 mph10 km/h | |
DayMostly cloudy and warm, with a high of 69°F21°C and morning low of 55°F13°C. Breezy from the WNW at 7 mph11 km/h. 15% chance of showers throughout the day. Dry air. NightMostly cloudy, with a low around 56°F13°C. Light wind from the WNW around 6 mph10 km/h. 16% chance of showers throughout the night. | |||||||
Nearby Cities
About This Forecast
This forecast is powered by WeatherMesh, the world's most advanced and accurate weather model powered by AI. WeatherMesh is built on proprietary data from WindBorne's Global Sounding Balloon constellation — the world's largest fleet of autonomous, long-duration weather balloons — collecting observations across 100% of Earth, including over oceans and remote regions where no other data exists.
WeatherMesh consistently outperforms legacy models in independent benchmarks. View Benchmarks →
Access WeatherMesh forecasts programmatically via our API. API Documentation →
Coordinates: 38.9695°N, 77.3861°W·Elevation: 110m·Timezone: America/New_York·Population: 24,568