Herndon Weather History Virginia, United States of America

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Past date: Past date must be from 1st Jan, 2009 onwards.

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Daily and hourly data from 1 Jan 2009 onwards.
Yearly Monthly Averages
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Mon 11 Aug, 2025 Weather in Herndon

Sunrise: 06:19 AM Sunset: 08:09 PM	Moonrise: 09:32 PM Moonset: 08:44 AM	Max: 32.5 °c	Min: 18.8 °c	Avg: 25.3 °c	Precip: 0.00 mm	Max Wind: 10.4 kph

	Mon 11 0:00 am	Mon 11 3:00 am	Mon 11 6:00 am	Mon 11 9:00 am	Mon 11 12:00 pm	Mon 11 3:00 pm	Mon 11 6:00 pm	Mon 11 9:00 pm
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Temp	21.6°c	19.5°c	18.9°c	24.0°c	30.1°c	32.3°c	29.8°c	25.7°c
Wind	7.2 kmph	5.4 kmph	2.2 kmph	4.0 kmph	7.6 kmph	7.2 kmph	7.9 kmph	10.4 kmph
Precip	0.00 mm	0.00 mm	0.00 mm	0.00 mm	0.00 mm	0.00 mm	0.00 mm	0.00 mm
Cloud	0%	0%	13%	13%	0%	0%	0%	0%
Humidity	58%	71%	80%	70%	50%	40%	43%	58%
Pressure	1023 mb	1023 mb	1023 mb	1024 mb	1023 mb	1021 mb	1020 mb	1021 mb

Herndon Annual Weather Averages

Month	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
January	5°C / 40°F	-3°C / 27°F	1°C / 33°F	170 hours	84.31 mm / 3.32 In	7 days	1019 mb / 31 In
February	7°C / 45°F	-1°C / 29°F	3°C / 37°F	151 hours	104.66 mm / 4.12 In	7 days	1019 mb / 31 In
March	12°C / 54°F	2°C / 36°F	7°C / 45°F	160 hours	96.29 mm / 3.79 In	7 days	1018 mb / 31 In
April	18°C / 65°F	8°C / 46°F	13°C / 55°F	170 hours	115.19 mm / 4.54 In	7 days	1016 mb / 30 In
May	23°C / 74°F	13°C / 56°F	18°C / 64°F	175 hours	141.64 mm / 5.58 In	10 days	1016 mb / 30 In
June	29°C / 84°F	18°C / 64°F	23°C / 73°F	213 hours	132.31 mm / 5.21 In	10 days	1014 mb / 30 In
July	32°C / 89°F	21°C / 69°F	26°C / 79°F	226 hours	141.59 mm / 5.57 In	10 days	1015 mb / 30 In
August	30°C / 86°F	20°C / 68°F	24°C / 76°F	213 hours	112.43 mm / 4.43 In	11 days	1016 mb / 30 In
September	26°C / 79°F	16°C / 61°F	21°C / 69°F	199 hours	128.90 mm / 5.07 In	8 days	1018 mb / 31 In
October	20°C / 67°F	10°C / 50°F	15°C / 58°F	199 hours	107.24 mm / 4.22 In	6 days	1018 mb / 31 In
November	13°C / 55°F	4°C / 39°F	8°C / 46°F	209 hours	87.48 mm / 3.44 In	5 days	1021 mb / 31 In
December	8°C / 46°F	0°C / 33°F	4°C / 39°F	170 hours	117.90 mm / 4.64 In	7 days	1020 mb / 31 In

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