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 Herndon Weather Forecast Summary |
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Today
May 13th
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Thursday
May 14th
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Friday
May 15th
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Saturday
May 16th
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Sunday
May 17th
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Mix of Cloud and Sun |
Mix of Cloud and Sun |
Mix of Cloud and Sun |
Mix of Sun and Cloud |
Mostly Sunny |
62°F
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51°F
44°F |
62°F
45°F |
71°F
46°F |
79°F
55°F |
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| Herndon Detailed Weather Forecast |
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| Wednesday, May 13th, 2026 |
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Overnight |
Temperature: 47°F |
| A mix of cloudy and clear skies. |
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Morning |
Temperature: 56°F |
| A mix of cloud and sun. Windy at times. |
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Afternoon |
Temperature: 60°F |
| Mostly cloudy with a chance of showers. Slight chance of a thunderstorm. Windy at times. |
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Evening |
Temperature: 53°F |
| A mix of cloudy and clear skies with a chance of showers. |
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| Thursday, May 14th, 2026 |
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Overnight |
Temperature: 47°F |
| A mix of cloudy and clear skies with a chance of showers. |
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Morning |
Temperature: 48°F |
| A mix of cloud and sun. Windy at times. |
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Afternoon |
Temperature: 50°F |
| A mix of cloud and sun. Windy at times. |
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Evening |
Temperature: 46°F |
| A mix of cloudy and clear skies. Windy at times. |
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| Friday, May 15th, 2026 |
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Overnight |
Temperature: 45°F |
| A mix of cloudy and clear skies. Windy at times. |
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Morning |
Temperature: 52°F |
| Sunny with cloudy periods. Windy at times. |
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Afternoon |
Temperature: 62°F |
| A mix of sun and cloud. Windy at times. |
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Evening |
Temperature: 54°F |
| Mostly cloudy. |
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| Saturday, May 16th, 2026 |
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Overnight |
Temperature: 47°F |
| Mostly clear. |
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Morning |
Temperature: 59°F |
| Sunny with cloudy periods. |
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Afternoon |
Temperature: 65°F |
| Cloudy with a chance of showers. Windy at times. |
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Evening |
Temperature: 58°F |
| Mostly clear with a chance of showers. |
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| Sunday, May 17th, 2026 |
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Overnight |
Temperature: 56°F |
| Mostly clear. |
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Morning |
Temperature: 66°F |
| Mostly sunny. |
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Afternoon |
Temperature: 78°F |
| Mostly sunny. |
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Evening |
Temperature: 64°F |
| Mostly clear. |
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| Monday, May 18th, 2026 |
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Overnight |
Temperature: 57°F |
| Clear. |
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Morning |
Temperature: 68°F |
| Sunny. Windy at times. |
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Afternoon |
Temperature: 78°F |
| Sunny with a chance of showers or thundershowers. Windy at times. |
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Evening |
Temperature: 68°F |
| Mostly clear with a chance of showers or thundershowers. |
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| Tuesday, May 19th, 2026 |
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Overnight |
Temperature: 62°F |
| Mostly clear. |
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Morning |
Temperature: 74°F |
| Mostly sunny. Slight chance of a thunderstorm. |
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Afternoon |
Temperature: 82°F |
| Sunny with cloudy periods. Chance of a thunderstorm. Windy at times. |
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Evening |
Temperature: 68°F |
| Cloudy with a slight chance of showers. |
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| Wednesday, May 20th, 2026 |
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Overnight |
Temperature: 65°F |
| Cloudy with a chance of showers. |
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Morning |
Temperature: 72°F |
| Mostly cloudy with a chance of showers or thundershowers. Windy. |
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Afternoon |
Temperature: 71°F |
| Cloudy with a few showers. Chance of a thunderstorm. Windy at times. |
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Evening |
Temperature: 64°F |
| A mix of clear and cloudy skies with showers likely. Windy at times. |
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