Alton December Weather Averages Illinois, United States of America

December Weather Averages for Alton

High Temp	6°C	43°F
Low Temp	-1°C	31°F
Avg Temp	3°C	37°F
Sunshine Hours	165 hours
Rainfall	75.21 mm	2.96 In
Rain days	7 days
Pressure	1020 mb	31 In

Alton December Averages Year by Year

Year	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
2008	4°C / 39°F	-4°C / 24°F	0°C / 32°F	176 hours	87.74 mm / 3.45 In	8 days	1020 mb / 31 In
2009	4°C / 38°F	-3°C / 26°F	0°C / 32°F	148 hours	121.03 mm / 4.76 In	11 days	1018 mb / 31 In
2010	1°C / 34°F	-5°C / 22°F	-2°C / 28°F	114 hours	37.90 mm / 1.49 In	6 days	1021 mb / 31 In
2011	7°C / 44°F	0°C / 33°F	3°C / 38°F	195 hours	88.19 mm / 3.47 In	11 days	1022 mb / 31 In
2012	8°C / 46°F	1°C / 34°F	4°C / 39°F	171 hours	69.48 mm / 2.74 In	7 days	1017 mb / 30 In
2013	3°C / 37°F	-5°C / 23°F	-1°C / 31°F	159 hours	66.70 mm / 2.63 In	6 days	1021 mb / 31 In
2014	5°C / 41°F	0°C / 31°F	2°C / 36°F	116 hours	51.40 mm / 2.02 In	5 days	1023 mb / 31 In
2015	10°C / 49°F	3°C / 38°F	6°C / 43°F	169 hours	189.28 mm / 7.45 In	8 days	1016 mb / 30 In
2016	4°C / 39°F	-3°C / 26°F	0°C / 32°F	214 hours	30.40 mm / 1.20 In	8 days	1024 mb / 31 In
2017	5°C / 41°F	-2°C / 28°F	1°C / 33°F	182 hours	15.60 mm / 0.61 In	3 days	1023 mb / 31 In
2018	7°C / 44°F	0°C / 32°F	3°C / 38°F	167 hours	111.38 mm / 4.38 In	7 days	1019 mb / 31 In
2019	7°C / 45°F	-1°C / 31°F	3°C / 38°F	183 hours	34.60 mm / 1.36 In	5 days	1018 mb / 31 In
2020	6°C / 43°F	-1°C / 31°F	2°C / 36°F	202 hours	37.69 mm / 1.48 In	4 days	1019 mb / 31 In
2021	13°C / 55°F	3°C / 38°F	7°C / 45°F	212 hours	72.80 mm / 2.87 In	7 days	1015 mb / 30 In
2022	6°C / 42°F	-2°C / 28°F	2°C / 35°F	106 hours	50.80 mm / 2.00 In	5 days	1019 mb / 31 In
2023	9°C / 49°F	2°C / 36°F	6°C / 42°F	165 hours	84.15 mm / 3.31 In	7 days	1019 mb / 31 In
2024	6°C / 43°F	0°C / 32°F	3°C / 37°F	142 hours	141.91 mm / 5.59 In	6 days	1022 mb / 31 In

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