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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Sun 22 Mar, 2026 Weather in Herndon

Sunrise: 07:10 AM Sunset: 07:24 PM	Moonrise: 08:51 AM Moonset: No moonset	Max: 26.7 °c	Min: 8.8 °c	Avg: 16.9 °c	Precip: 0.00 mm	Max Wind: 17.3 kph

	Sun 22 0:00 am	Sun 22 3:00 am	Sun 22 6:00 am	Sun 22 9:00 am	Sun 22 12:00 pm	Sun 22 3:00 pm	Sun 22 6:00 pm	Sun 22 9:00 pm
Icon
Temp	10.7°c	9.6°c	8.9°c	12.2°c	20.1°c	25.8°c	24.8°c	22.3°c
Wind	10.1 kmph	10.8 kmph	7.6 kmph	8.6 kmph	11.9 kmph	17.3 kmph	14.4 kmph	14.0 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	71%	41%	20%	44%	34%	1%	0%	14%
Humidity	81%	83%	88%	79%	60%	50%	52%	60%
Pressure	1012 mb	1011 mb	1010 mb	1009 mb	1007 mb	1004 mb	1003 mb	1002 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	174 hours	91.81 mm / 3.61 In	7 days	1019 mb / 31 In
February	7°C / 45°F	-1°C / 30°F	3°C / 37°F	150 hours	104.63 mm / 4.12 In	7 days	1019 mb / 31 In
March	12°C / 54°F	3°C / 37°F	7°C / 45°F	163 hours	95.93 mm / 3.78 In	7 days	1018 mb / 31 In
April	18°C / 65°F	8°C / 46°F	13°C / 55°F	173 hours	115.90 mm / 4.56 In	7 days	1016 mb / 30 In
May	24°C / 74°F	13°C / 56°F	18°C / 65°F	176 hours	142.02 mm / 5.59 In	10 days	1016 mb / 30 In
June	29°C / 84°F	18°C / 64°F	23°C / 73°F	214 hours	130.87 mm / 5.15 In	10 days	1014 mb / 30 In
July	32°C / 89°F	21°C / 69°F	26°C / 79°F	228 hours	141.13 mm / 5.56 In	10 days	1015 mb / 30 In
August	30°C / 86°F	20°C / 68°F	24°C / 76°F	212 hours	110.14 mm / 4.34 In	10 days	1016 mb / 30 In
September	26°C / 79°F	16°C / 61°F	21°C / 70°F	198 hours	138.90 mm / 5.47 In	7 days	1018 mb / 31 In
October	20°C / 68°F	10°C / 50°F	15°C / 58°F	199 hours	119.93 mm / 4.72 In	6 days	1018 mb / 31 In
November	13°C / 55°F	4°C / 39°F	8°C / 47°F	210 hours	90.88 mm / 3.58 In	5 days	1021 mb / 31 In
December	8°C / 46°F	0°C / 33°F	4°C / 39°F	173 hours	121.69 mm / 4.79 In	7 days	1020 mb / 31 In

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