Summit September Weather Averages Illinois, United States of America

September Weather Averages for Summit

High Temp	24°C	75°F
Low Temp	16°C	61°F
Avg Temp	20°C	67°F
Sunshine Hours	235 hours
Rainfall	76.20 mm	3.00 In
Rain days	6 days
Pressure	1017 mb	31 In

Summit September Averages Year by Year

Year	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
2008	23°C / 73°F	15°C / 60°F	19°C / 66°F	230 hours	231.91 mm / 9.13 In	8 days	1018 mb / 31 In
2009	22°C / 72°F	15°C / 59°F	19°C / 65°F	255 hours	27.20 mm / 1.07 In	3 days	1018 mb / 31 In
2010	22°C / 72°F	14°C / 58°F	18°C / 65°F	240 hours	103.80 mm / 4.09 In	7 days	1015 mb / 30 In
2011	20°C / 68°F	14°C / 57°F	17°C / 62°F	194 hours	118.50 mm / 4.67 In	10 days	1015 mb / 30 In
2012	22°C / 71°F	14°C / 57°F	18°C / 64°F	269 hours	50.20 mm / 1.98 In	4 days	1016 mb / 30 In
2013	23°C / 74°F	15°C / 60°F	19°C / 67°F	249 hours	37.65 mm / 1.48 In	4 days	1016 mb / 30 In
2014	22°C / 71°F	14°C / 56°F	17°C / 63°F	253 hours	87.09 mm / 3.43 In	6 days	1018 mb / 31 In
2015	24°C / 75°F	16°C / 61°F	20°C / 68°F	203 hours	83.64 mm / 3.29 In	6 days	1018 mb / 31 In
2016	24°C / 75°F	17°C / 63°F	20°C / 68°F	223 hours	73.17 mm / 2.88 In	13 days	1017 mb / 31 In
2017	25°C / 77°F	17°C / 63°F	21°C / 70°F	301 hours	31.40 mm / 1.24 In	4 days	1017 mb / 31 In
2018	24°C / 75°F	17°C / 63°F	21°C / 69°F	226 hours	73.04 mm / 2.88 In	9 days	1019 mb / 31 In
2019	25°C / 76°F	18°C / 65°F	21°C / 70°F	210 hours	139.84 mm / 5.51 In	12 days	1017 mb / 30 In
2020	23°C / 73°F	16°C / 60°F	19°C / 67°F	220 hours	112.80 mm / 4.44 In	5 days	1018 mb / 31 In
2021	27°C / 80°F	18°C / 64°F	22°C / 71°F	254 hours	56.10 mm / 2.21 In	6 days	1015 mb / 30 In
2022	25°C / 76°F	16°C / 61°F	20°C / 68°F	223 hours	68.30 mm / 2.69 In	5 days	1017 mb / 30 In
2023	27°C / 80°F	16°C / 61°F	21°C / 70°F	198 hours	113.80 mm / 4.48 In	4 days	1017 mb / 31 In
2024	26°C / 80°F	18°C / 64°F	22°C / 71°F	235 hours	42.74 mm / 1.68 In	1 days	1017 mb / 31 In

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