Mount Vernon September Weather Averages Illinois, United States of America

September Weather Averages for Mount Vernon

High Temp	27°C	80°F
Low Temp	16°C	62°F
Avg Temp	21°C	70°F
Sunshine Hours	240 hours
Rainfall	89.94 mm	3.54 In
Rain days	5 days
Pressure	1017 mb	30 In

Mount Vernon September Averages Year by Year

Year	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
2008	27°C / 80°F	17°C / 62°F	21°C / 70°F	250 hours	85.19 mm / 3.35 In	7 days	1018 mb / 31 In
2009	26°C / 79°F	16°C / 60°F	21°C / 69°F	243 hours	92.96 mm / 3.66 In	8 days	1017 mb / 31 In
2010	27°C / 80°F	16°C / 61°F	21°C / 70°F	288 hours	89.51 mm / 3.52 In	8 days	1016 mb / 30 In
2011	23°C / 74°F	14°C / 57°F	19°C / 65°F	226 hours	129.70 mm / 5.11 In	8 days	1016 mb / 30 In
2012	24°C / 76°F	15°C / 60°F	19°C / 67°F	203 hours	216.63 mm / 8.53 In	7 days	1016 mb / 30 In
2013	28°C / 82°F	17°C / 62°F	22°C / 71°F	263 hours	50.80 mm / 2.00 In	5 days	1016 mb / 30 In
2014	25°C / 78°F	15°C / 58°F	20°C / 67°F	247 hours	55.56 mm / 2.19 In	4 days	1018 mb / 31 In
2015	27°C / 80°F	17°C / 63°F	22°C / 71°F	196 hours	91.46 mm / 3.60 In	4 days	1017 mb / 31 In
2016	27°C / 80°F	18°C / 64°F	22°C / 71°F	254 hours	117.58 mm / 4.63 In	9 days	1018 mb / 31 In
2017	27°C / 81°F	17°C / 62°F	22°C / 71°F	266 hours	39.81 mm / 1.57 In	1 days	1017 mb / 31 In
2018	27°C / 80°F	18°C / 65°F	22°C / 72°F	237 hours	177.09 mm / 6.97 In	5 days	1018 mb / 31 In
2019	29°C / 84°F	19°C / 67°F	24°C / 75°F	291 hours	15.25 mm / 0.60 In	3 days	1017 mb / 31 In
2020	25°C / 77°F	16°C / 60°F	20°C / 68°F	212 hours	41.03 mm / 1.62 In	4 days	1018 mb / 31 In
2021	28°C / 83°F	17°C / 63°F	22°C / 72°F	227 hours	95.00 mm / 3.74 In	4 days	1016 mb / 30 In
2022	28°C / 82°F	16°C / 61°F	21°C / 70°F	235 hours	48.90 mm / 1.93 In	5 days	1017 mb / 31 In
2023	31°C / 88°F	15°C / 59°F	22°C / 72°F	251 hours	72.73 mm / 2.86 In	1 days	1016 mb / 30 In
2024	28°C / 82°F	17°C / 62°F	22°C / 71°F	197 hours	105.12 mm / 4.14 In	6 days	1015 mb / 30 In

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