Chicago September Weather Averages Illinois, United States of America

September Weather Averages for Chicago

High Temp	23°C	73°F
Low Temp	17°C	62°F
Avg Temp	20°C	67°F
Sunshine Hours	230 hours
Rainfall	94.46 mm	3.72 In
Rain days	6 days
Pressure	1017 mb	31 In

Chicago September Averages Year by Year

Year	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
2008	22°C / 71°F	16°C / 61°F	19°C / 66°F	234 hours	267.27 mm / 10.52 In	8 days	1018 mb / 31 In
2009	21°C / 70°F	16°C / 60°F	19°C / 65°F	242 hours	31.80 mm / 1.25 In	5 days	1018 mb / 31 In
2010	21°C / 71°F	15°C / 59°F	18°C / 65°F	243 hours	106.57 mm / 4.20 In	7 days	1015 mb / 30 In
2011	20°C / 67°F	15°C / 59°F	17°C / 63°F	192 hours	127.63 mm / 5.02 In	10 days	1015 mb / 30 In
2012	21°C / 70°F	15°C / 59°F	18°C / 64°F	272 hours	40.90 mm / 1.61 In	3 days	1016 mb / 30 In
2013	22°C / 72°F	16°C / 61°F	19°C / 66°F	245 hours	82.99 mm / 3.27 In	5 days	1016 mb / 30 In
2014	21°C / 70°F	14°C / 58°F	18°C / 64°F	239 hours	129.57 mm / 5.10 In	7 days	1018 mb / 31 In
2015	23°C / 73°F	17°C / 63°F	20°C / 68°F	206 hours	106.26 mm / 4.18 In	6 days	1018 mb / 31 In
2016	23°C / 73°F	18°C / 64°F	20°C / 69°F	218 hours	131.31 mm / 5.17 In	12 days	1017 mb / 31 In
2017	24°C / 75°F	18°C / 64°F	21°C / 70°F	303 hours	34.74 mm / 1.37 In	5 days	1017 mb / 31 In
2018	23°C / 73°F	17°C / 63°F	20°C / 68°F	225 hours	127.78 mm / 5.03 In	8 days	1019 mb / 31 In
2019	23°C / 74°F	19°C / 65°F	21°C / 70°F	201 hours	188.97 mm / 7.44 In	11 days	1017 mb / 30 In
2020	22°C / 71°F	16°C / 61°F	19°C / 66°F	218 hours	115.30 mm / 4.54 In	6 days	1018 mb / 31 In
2021	25°C / 78°F	18°C / 65°F	22°C / 71°F	258 hours	44.20 mm / 1.74 In	6 days	1015 mb / 30 In
2022	23°C / 74°F	17°C / 63°F	20°C / 68°F	220 hours	66.30 mm / 2.61 In	5 days	1017 mb / 30 In
2023	24°C / 76°F	17°C / 63°F	21°C / 69°F	184 hours	127.19 mm / 5.01 In	3 days	1017 mb / 31 In
2024	24°C / 76°F	18°C / 65°F	21°C / 70°F	213 hours	49.88 mm / 1.96 In	1 days	1017 mb / 31 In

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