Rock Falls September Weather Averages Illinois, United States of America

September Weather Averages for Rock Falls

High Temp	24°C	76°F
Low Temp	13°C	56°F
Avg Temp	19°C	66°F
Sunshine Hours	239 hours
Rainfall	81.80 mm	3.22 In
Rain days	6 days
Pressure	1017 mb	30 In

Rock Falls September Averages Year by Year

Year	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
2008	23°C / 74°F	13°C / 56°F	18°C / 64°F	211 hours	220.49 mm / 8.68 In	8 days	1018 mb / 31 In
2009	23°C / 73°F	12°C / 54°F	17°C / 63°F	219 hours	33.19 mm / 1.31 In	4 days	1018 mb / 31 In
2010	23°C / 73°F	13°C / 55°F	18°C / 64°F	226 hours	136.34 mm / 5.37 In	12 days	1015 mb / 30 In
2011	20°C / 68°F	11°C / 53°F	16°C / 60°F	213 hours	74.23 mm / 2.92 In	6 days	1016 mb / 30 In
2012	23°C / 73°F	11°C / 52°F	16°C / 62°F	267 hours	40.00 mm / 1.57 In	6 days	1016 mb / 30 In
2013	25°C / 76°F	13°C / 56°F	19°C / 66°F	254 hours	48.83 mm / 1.92 In	6 days	1015 mb / 30 In
2014	23°C / 73°F	11°C / 52°F	17°C / 62°F	268 hours	87.97 mm / 3.46 In	7 days	1018 mb / 31 In
2015	26°C / 78°F	15°C / 59°F	20°C / 68°F	228 hours	52.70 mm / 2.07 In	3 days	1017 mb / 31 In
2016	25°C / 77°F	16°C / 60°F	20°C / 68°F	207 hours	55.89 mm / 2.20 In	5 days	1017 mb / 31 In
2017	26°C / 78°F	14°C / 57°F	20°C / 67°F	327 hours	26.34 mm / 1.04 In	2 days	1017 mb / 31 In
2018	24°C / 75°F	14°C / 58°F	19°C / 66°F	193 hours	150.98 mm / 5.94 In	14 days	1018 mb / 31 In
2019	24°C / 76°F	16°C / 61°F	20°C / 68°F	200 hours	243.90 mm / 9.60 In	9 days	1016 mb / 30 In
2020	22°C / 71°F	13°C / 55°F	17°C / 63°F	211 hours	143.09 mm / 5.63 In	8 days	1017 mb / 31 In
2021	28°C / 83°F	15°C / 60°F	22°C / 71°F	271 hours	15.80 mm / 0.62 In	3 days	1014 mb / 30 In
2022	25°C / 77°F	14°C / 56°F	19°C / 66°F	269 hours	87.10 mm / 3.43 In	4 days	1017 mb / 30 In
2023	29°C / 84°F	13°C / 56°F	20°C / 68°F	202 hours	78.06 mm / 3.07 In	5 days	1016 mb / 30 In
2024	26°C / 79°F	13°C / 56°F	19°C / 67°F	262 hours	34.44 mm / 1.36 In	1 days	1017 mb / 31 In

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