Charleston September Weather Averages Illinois, United States of America

September Weather Averages for Charleston

High Temp	26°C	78°F
Low Temp	15°C	59°F
Avg Temp	20°C	68°F
Sunshine Hours	234 hours
Rainfall	77.20 mm	3.04 In
Rain days	5 days
Pressure	1017 mb	31 In

Charleston September Averages Year by Year

Year	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
2008	25°C / 77°F	15°C / 59°F	20°C / 68°F	226 hours	125.12 mm / 4.93 In	7 days	1018 mb / 31 In
2009	25°C / 76°F	15°C / 58°F	19°C / 67°F	244 hours	61.60 mm / 2.43 In	6 days	1018 mb / 31 In
2010	26°C / 79°F	15°C / 59°F	20°C / 68°F	256 hours	66.10 mm / 2.60 In	5 days	1015 mb / 30 In
2011	22°C / 72°F	13°C / 56°F	17°C / 63°F	185 hours	77.63 mm / 3.06 In	7 days	1015 mb / 30 In
2012	23°C / 73°F	14°C / 56°F	18°C / 64°F	224 hours	170.48 mm / 6.71 In	9 days	1016 mb / 30 In
2013	27°C / 80°F	15°C / 59°F	21°C / 69°F	274 hours	23.94 mm / 0.94 In	4 days	1016 mb / 30 In
2014	23°C / 74°F	13°C / 55°F	18°C / 64°F	226 hours	130.62 mm / 5.14 In	5 days	1018 mb / 31 In
2015	26°C / 79°F	16°C / 61°F	21°C / 69°F	209 hours	61.21 mm / 2.41 In	3 days	1017 mb / 31 In
2016	26°C / 78°F	17°C / 62°F	21°C / 70°F	217 hours	104.14 mm / 4.10 In	12 days	1018 mb / 31 In
2017	26°C / 79°F	16°C / 60°F	21°C / 69°F	270 hours	35.94 mm / 1.41 In	3 days	1017 mb / 31 In
2018	25°C / 78°F	17°C / 63°F	21°C / 70°F	230 hours	174.27 mm / 6.86 In	5 days	1018 mb / 31 In
2019	27°C / 81°F	18°C / 64°F	22°C / 72°F	269 hours	44.97 mm / 1.77 In	6 days	1017 mb / 31 In
2020	24°C / 76°F	15°C / 58°F	19°C / 67°F	221 hours	34.90 mm / 1.37 In	4 days	1018 mb / 31 In
2021	27°C / 80°F	16°C / 61°F	21°C / 70°F	240 hours	67.80 mm / 2.67 In	4 days	1016 mb / 30 In
2022	26°C / 78°F	15°C / 59°F	20°C / 68°F	237 hours	80.70 mm / 3.18 In	5 days	1017 mb / 31 In
2023	30°C / 86°F	14°C / 57°F	21°C / 70°F	222 hours	47.83 mm / 1.88 In	3 days	1017 mb / 31 In
2024	27°C / 81°F	15°C / 60°F	21°C / 70°F	218 hours	53.00 mm / 2.09 In	5 days	1016 mb / 30 In

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