Decatur December Weather Averages Illinois, United States of America

December Weather Averages for Decatur

High Temp	5°C	41°F
Low Temp	-2°C	29°F
Avg Temp	1°C	34°F
Sunshine Hours	148 hours
Rainfall	75.69 mm	2.98 In
Rain days	8 days
Pressure	1020 mb	31 In

Decatur December Averages Year by Year

Year	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
2009	2°C / 36°F	-4°C / 25°F	-1°C / 30°F	138 hours	126.58 mm / 4.98 In	13 days	1018 mb / 31 In
2010	-1°C / 31°F	-7°C / 20°F	-4°C / 25°F	74 hours	54.40 mm / 2.14 In	9 days	1021 mb / 31 In
2011	6°C / 42°F	0°C / 31°F	3°C / 37°F	203 hours	83.48 mm / 3.29 In	9 days	1022 mb / 31 In
2012	6°C / 43°F	0°C / 32°F	3°C / 38°F	110 hours	78.32 mm / 3.08 In	8 days	1016 mb / 30 In
2013	2°C / 35°F	-6°C / 22°F	-2°C / 29°F	138 hours	69.30 mm / 2.73 In	8 days	1021 mb / 31 In
2014	4°C / 39°F	-1°C / 29°F	1°C / 34°F	127 hours	56.60 mm / 2.23 In	7 days	1024 mb / 31 In
2015	9°C / 48°F	3°C / 37°F	6°C / 42°F	168 hours	154.70 mm / 6.09 In	9 days	1016 mb / 30 In
2016	2°C / 36°F	-5°C / 24°F	-1°C / 30°F	167 hours	45.90 mm / 1.81 In	9 days	1023 mb / 31 In
2017	3°C / 37°F	-4°C / 25°F	-1°C / 31°F	179 hours	16.50 mm / 0.65 In	6 days	1022 mb / 31 In
2018	6°C / 42°F	-1°C / 30°F	2°C / 36°F	195 hours	112.44 mm / 4.43 In	7 days	1019 mb / 31 In
2019	6°C / 43°F	-1°C / 30°F	2°C / 36°F	180 hours	45.80 mm / 1.80 In	5 days	1018 mb / 31 In
2020	5°C / 41°F	-2°C / 29°F	1°C / 34°F	185 hours	41.91 mm / 1.65 In	5 days	1018 mb / 31 In
2021	11°C / 52°F	2°C / 35°F	6°C / 42°F	185 hours	62.90 mm / 2.48 In	8 days	1015 mb / 30 In
2022	4°C / 40°F	-3°C / 26°F	0°C / 33°F	81 hours	70.50 mm / 2.78 In	7 days	1019 mb / 31 In
2023	8°C / 47°F	2°C / 36°F	5°C / 41°F	145 hours	73.17 mm / 2.88 In	7 days	1019 mb / 31 In
2024	4°C / 39°F	-1°C / 30°F	1°C / 34°F	97 hours	118.55 mm / 4.67 In	6 days	1022 mb / 31 In

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