Herndon December Weather Averages Virginia, United States of America

December Weather Averages for Herndon

High Temp	8°C	46°F
Low Temp	0°C	33°F
Avg Temp	4°C	39°F
Sunshine Hours	170 hours
Rainfall	117.90 mm	4.64 In
Rain days	7 days
Pressure	1020 mb	31 In

Herndon December Averages Year by Year

Year	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
2008	7°C / 45°F	-1°C / 31°F	3°C / 38°F	185 hours	110.18 mm / 4.34 In	10 days	1021 mb / 31 In
2009	4°C / 40°F	-3°C / 27°F	1°C / 33°F	188 hours	188.76 mm / 7.43 In	7 days	1019 mb / 31 In
2010	2°C / 36°F	-4°C / 24°F	-2°C / 29°F	200 hours	75.61 mm / 2.98 In	5 days	1016 mb / 30 In
2011	9°C / 49°F	2°C / 35°F	5°C / 41°F	224 hours	141.80 mm / 5.58 In	5 days	1022 mb / 31 In
2012	9°C / 48°F	2°C / 35°F	5°C / 41°F	175 hours	93.77 mm / 3.69 In	8 days	1017 mb / 31 In
2013	7°C / 45°F	-1°C / 31°F	3°C / 38°F	158 hours	163.63 mm / 6.44 In	9 days	1021 mb / 31 In
2014	7°C / 45°F	0°C / 33°F	4°C / 38°F	139 hours	84.30 mm / 3.32 In	10 days	1022 mb / 31 In
2015	13°C / 56°F	6°C / 42°F	9°C / 49°F	131 hours	120.90 mm / 4.76 In	8 days	1019 mb / 31 In
2016	7°C / 45°F	-1°C / 31°F	3°C / 37°F	180 hours	59.26 mm / 2.33 In	6 days	1022 mb / 31 In
2017	6°C / 43°F	-1°C / 30°F	2°C / 36°F	194 hours	34.60 mm / 1.36 In	4 days	1020 mb / 31 In
2018	8°C / 47°F	1°C / 34°F	4°C / 40°F	147 hours	166.39 mm / 6.55 In	9 days	1020 mb / 31 In
2019	8°C / 46°F	1°C / 34°F	4°C / 39°F	182 hours	97.98 mm / 3.86 In	10 days	1019 mb / 31 In
2020	7°C / 44°F	0°C / 32°F	3°C / 38°F	173 hours	194.22 mm / 7.65 In	7 days	1018 mb / 31 In
2021	12°C / 53°F	3°C / 38°F	7°C / 45°F	173 hours	30.50 mm / 1.20 In	6 days	1019 mb / 31 In
2022	7°C / 45°F	-1°C / 31°F	3°C / 37°F	165 hours	122.20 mm / 4.81 In	7 days	1022 mb / 31 In
2023	10°C / 50°F	2°C / 36°F	6°C / 42°F	147 hours	168.88 mm / 6.65 In	8 days	1021 mb / 31 In
2024	6°C / 43°F	0°C / 32°F	3°C / 37°F	151 hours	143.55 mm / 5.65 In	6 days	1023 mb / 31 In

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