Grand Chain September Weather Averages Illinois, United States of America

September Weather Averages for Grand Chain

High Temp	28°C	82°F
Low Temp	17°C	62°F
Avg Temp	22°C	71°F
Sunshine Hours	231 hours
Rainfall	99.67 mm	3.92 In
Rain days	6 days
Pressure	1017 mb	30 In

Grand Chain September Averages Year by Year

Year	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
2009	27°C / 80°F	17°C / 62°F	21°C / 70°F	216 hours	88.10 mm / 3.47 In	9 days	1017 mb / 30 In
2010	29°C / 83°F	17°C / 62°F	22°C / 71°F	287 hours	72.69 mm / 2.86 In	4 days	1016 mb / 30 In
2011	25°C / 78°F	15°C / 59°F	20°C / 67°F	208 hours	120.01 mm / 4.72 In	10 days	1015 mb / 30 In
2012	25°C / 78°F	16°C / 60°F	20°C / 68°F	196 hours	166.71 mm / 6.56 In	10 days	1016 mb / 30 In
2013	28°C / 82°F	17°C / 63°F	22°C / 72°F	247 hours	48.96 mm / 1.93 In	7 days	1016 mb / 30 In
2014	27°C / 80°F	15°C / 60°F	21°C / 69°F	268 hours	34.80 mm / 1.37 In	5 days	1018 mb / 31 In
2015	27°C / 81°F	17°C / 63°F	22°C / 71°F	185 hours	78.90 mm / 3.11 In	4 days	1017 mb / 31 In
2016	29°C / 84°F	18°C / 64°F	23°C / 73°F	239 hours	55.24 mm / 2.17 In	9 days	1018 mb / 31 In
2017	27°C / 81°F	17°C / 62°F	22°C / 71°F	277 hours	35.53 mm / 1.40 In	5 days	1017 mb / 31 In
2018	27°C / 81°F	19°C / 66°F	23°C / 73°F	238 hours	98.61 mm / 3.88 In	7 days	1017 mb / 31 In
2019	31°C / 88°F	20°C / 68°F	25°C / 77°F	252 hours	22.20 mm / 0.87 In	4 days	1017 mb / 31 In
2020	25°C / 78°F	16°C / 61°F	21°C / 69°F	214 hours	116.90 mm / 4.60 In	4 days	1017 mb / 31 In
2021	29°C / 84°F	17°C / 63°F	23°C / 73°F	228 hours	78.30 mm / 3.08 In	7 days	1016 mb / 30 In
2022	29°C / 85°F	17°C / 62°F	22°C / 72°F	253 hours	32.70 mm / 1.29 In	4 days	1017 mb / 30 In
2023	31°C / 88°F	16°C / 61°F	23°C / 73°F	253 hours	22.22 mm / 0.87 In	3 days	1016 mb / 30 In
2024	28°C / 83°F	17°C / 63°F	22°C / 72°F	191 hours	311.07 mm / 12.25 In	6 days	1015 mb / 30 In
2025	28°C / 83°F	17°C / 63°F	22°C / 72°F	182 hours	311.50 mm / 12.26 In	6 days	1017 mb / 31 In

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