Helena December Weather Averages Montana, United States of America

December Weather Averages for Helena

High Temp	-2°C	29°F
Low Temp	-10°C	14°F
Avg Temp	-6°C	21°F
Sunshine Hours	178 hours
Rainfall	23.46 mm	0.92 In
Rain days	8 days
Pressure	1021 mb	31 In

Helena December Averages Year by Year

Year	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
2008	-5°C / 22°F	-14°C / 7°F	-10°C / 14°F	73 hours	42.83 mm / 1.69 In	11 days	1020 mb / 31 In
2009	-7°C / 20°F	-14°C / 6°F	-11°C / 13°F	106 hours	24.50 mm / 0.96 In	8 days	1024 mb / 31 In
2010	-4°C / 25°F	-12°C / 11°F	-8°C / 18°F	35 hours	32.52 mm / 1.28 In	9 days	1019 mb / 31 In
2011	-2°C / 28°F	-11°C / 13°F	-6°C / 20°F	238 hours	13.60 mm / 0.54 In	5 days	1026 mb / 31 In
2012	-2°C / 28°F	-10°C / 13°F	-7°C / 20°F	179 hours	20.10 mm / 0.79 In	8 days	1016 mb / 30 In
2013	-5°C / 23°F	-13°C / 8°F	-9°C / 15°F	129 hours	29.50 mm / 1.16 In	11 days	1025 mb / 31 In
2014	-1°C / 30°F	-9°C / 16°F	-5°C / 22°F	174 hours	29.30 mm / 1.15 In	9 days	1021 mb / 31 In
2015	-2°C / 28°F	-9°C / 15°F	-6°C / 20°F	187 hours	40.40 mm / 1.59 In	10 days	1017 mb / 31 In
2016	-7°C / 19°F	-15°C / 5°F	-11°C / 12°F	174 hours	26.40 mm / 1.04 In	14 days	1024 mb / 31 In
2017	-2°C / 29°F	-10°C / 13°F	-7°C / 20°F	225 hours	58.50 mm / 2.30 In	12 days	1027 mb / 31 In
2018	0°C / 31°F	-9°C / 16°F	-5°C / 23°F	283 hours	14.10 mm / 0.56 In	5 days	1022 mb / 31 In
2019	0°C / 32°F	-8°C / 17°F	-5°C / 24°F	230 hours	6.60 mm / 0.26 In	2 days	1018 mb / 31 In
2020	2°C / 35°F	-6°C / 21°F	-3°C / 26°F	237 hours	6.30 mm / 0.25 In	5 days	1021 mb / 31 In
2021	-2°C / 29°F	-10°C / 15°F	-6°C / 21°F	124 hours	36.60 mm / 1.44 In	11 days	1014 mb / 30 In
2022	-5°C / 24°F	-14°C / 7°F	-9°C / 15°F	103 hours	33.80 mm / 1.33 In	18 days	1022 mb / 31 In
2023	3°C / 37°F	-5°C / 23°F	-1°C / 29°F	236 hours	3.18 mm / 0.13 In	5 days	1020 mb / 31 In
2024	4°C / 39°F	-5°C / 22°F	-1°C / 29°F	189 hours	0.00 mm / 0.00 In	0 days	1020 mb / 31 In

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