Normal September Weather Averages Illinois, United States of America

September Weather Averages for Normal

High Temp	25°C	77°F
Low Temp	14°C	58°F
Avg Temp	19°C	67°F
Sunshine Hours	230 hours
Rainfall	82.67 mm	3.25 In
Rain days	6 days
Pressure	1017 mb	31 In

Normal September Averages Year by Year

Year	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
2008	24°C / 74°F	14°C / 58°F	19°C / 66°F	208 hours	267.96 mm / 10.55 In	10 days	1018 mb / 31 In
2009	24°C / 75°F	13°C / 56°F	18°C / 65°F	212 hours	39.37 mm / 1.55 In	4 days	1018 mb / 31 In
2010	24°C / 76°F	14°C / 57°F	19°C / 66°F	246 hours	115.52 mm / 4.55 In	9 days	1015 mb / 30 In
2011	21°C / 70°F	12°C / 54°F	17°C / 62°F	203 hours	95.05 mm / 3.74 In	8 days	1016 mb / 30 In
2012	23°C / 73°F	12°C / 54°F	17°C / 63°F	221 hours	167.13 mm / 6.58 In	7 days	1016 mb / 30 In
2013	26°C / 78°F	14°C / 58°F	20°C / 68°F	283 hours	44.40 mm / 1.75 In	4 days	1016 mb / 30 In
2014	23°C / 73°F	12°C / 54°F	17°C / 63°F	240 hours	99.46 mm / 3.92 In	7 days	1018 mb / 31 In
2015	26°C / 79°F	16°C / 61°F	21°C / 69°F	212 hours	55.30 mm / 2.18 In	4 days	1017 mb / 31 In
2016	25°C / 77°F	16°C / 61°F	20°C / 69°F	202 hours	106.09 mm / 4.18 In	10 days	1017 mb / 31 In
2017	26°C / 79°F	15°C / 59°F	20°C / 68°F	291 hours	29.18 mm / 1.15 In	3 days	1017 mb / 31 In
2018	25°C / 77°F	16°C / 61°F	20°C / 68°F	191 hours	75.27 mm / 2.96 In	7 days	1018 mb / 31 In
2019	26°C / 78°F	17°C / 63°F	21°C / 70°F	206 hours	126.37 mm / 4.98 In	11 days	1017 mb / 30 In
2020	23°C / 74°F	14°C / 56°F	18°C / 65°F	209 hours	64.58 mm / 2.54 In	5 days	1017 mb / 31 In
2021	27°C / 80°F	16°C / 61°F	21°C / 70°F	275 hours	39.70 mm / 1.56 In	4 days	1015 mb / 30 In
2022	26°C / 79°F	14°C / 58°F	20°C / 68°F	249 hours	66.10 mm / 2.60 In	4 days	1017 mb / 31 In
2023	29°C / 84°F	14°C / 57°F	21°C / 69°F	214 hours	149.53 mm / 5.89 In	5 days	1017 mb / 31 In
2024	27°C / 80°F	15°C / 59°F	20°C / 69°F	233 hours	49.73 mm / 1.96 In	2 days	1017 mb / 30 In

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