Herndon May Weather Averages Virginia, United States of America

May Weather Averages for Herndon

High Temp	23°C	74°F
Low Temp	13°C	55°F
Avg Temp	18°C	64°F
Sunshine Hours	179 hours
Rainfall	121.02 mm	4.76 In
Rain days	10 days
Pressure	1016 mb	30 In

Herndon May Averages Year by Year

Year	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
2008	22°C / 71°F	10°C / 51°F	16°C / 61°F	223 hours	200.04 mm / 7.88 In	10 days	1011 mb / 30 In
2009	23°C / 73°F	13°C / 55°F	17°C / 63°F	191 hours	217.88 mm / 8.58 In	12 days	1017 mb / 31 In
2010	24°C / 76°F	14°C / 56°F	19°C / 66°F	207 hours	76.07 mm / 2.99 In	9 days	1016 mb / 30 In
2011	25°C / 76°F	13°C / 56°F	19°C / 66°F	214 hours	108.39 mm / 4.27 In	11 days	1014 mb / 30 In
2012	26°C / 79°F	15°C / 58°F	20°C / 68°F	223 hours	94.67 mm / 3.73 In	11 days	1016 mb / 30 In
2013	23°C / 73°F	11°C / 52°F	17°C / 63°F	216 hours	73.42 mm / 2.89 In	10 days	1018 mb / 31 In
2014	24°C / 75°F	12°C / 54°F	18°C / 64°F	205 hours	121.44 mm / 4.78 In	9 days	1017 mb / 30 In
2015	26°C / 79°F	14°C / 58°F	20°C / 68°F	251 hours	34.80 mm / 1.37 In	8 days	1020 mb / 31 In
2016	21°C / 69°F	12°C / 53°F	16°C / 61°F	122 hours	165.24 mm / 6.51 In	16 days	1015 mb / 30 In
2017	22°C / 71°F	12°C / 54°F	17°C / 62°F	139 hours	156.32 mm / 6.15 In	10 days	1013 mb / 30 In
2018	27°C / 80°F	17°C / 62°F	21°C / 70°F	179 hours	221.80 mm / 8.73 In	14 days	1017 mb / 31 In
2019	26°C / 78°F	16°C / 60°F	20°C / 68°F	194 hours	147.28 mm / 5.80 In	12 days	1015 mb / 30 In
2020	20°C / 67°F	11°C / 52°F	15°C / 60°F	113 hours	87.65 mm / 3.45 In	7 days	1017 mb / 30 In
2021	22°C / 71°F	11°C / 53°F	17°C / 62°F	141 hours	102.41 mm / 4.03 In	8 days	1019 mb / 31 In
2022	24°C / 75°F	13°C / 55°F	18°C / 64°F	153 hours	105.87 mm / 4.17 In	10 days	1017 mb / 31 In
2023	22°C / 72°F	10°C / 50°F	16°C / 61°F	183 hours	56.10 mm / 2.21 In	7 days	1017 mb / 31 In
2024	23°C / 73°F	14°C / 57°F	18°C / 65°F	128 hours	166.98 mm / 6.57 In	9 days	1013 mb / 30 In

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