Prospect Heights September Weather Averages Illinois, United States of America

September Weather Averages for Prospect Heights

High Temp	23°C	74°F
Low Temp	16°C	60°F
Avg Temp	19°C	67°F
Sunshine Hours	230 hours
Rainfall	82.81 mm	3.26 In
Rain days	6 days
Pressure	1017 mb	31 In

Prospect Heights September Averages Year by Year

Year	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
2008	22°C / 72°F	15°C / 59°F	18°C / 65°F	219 hours	263.57 mm / 10.38 In	8 days	1018 mb / 31 In
2009	22°C / 71°F	15°C / 58°F	18°C / 65°F	238 hours	36.16 mm / 1.42 In	4 days	1019 mb / 31 In
2010	22°C / 71°F	14°C / 58°F	18°C / 64°F	227 hours	87.53 mm / 3.45 In	5 days	1015 mb / 30 In
2011	20°C / 67°F	13°C / 56°F	16°C / 62°F	199 hours	114.20 mm / 4.50 In	9 days	1015 mb / 30 In
2012	22°C / 71°F	13°C / 56°F	17°C / 63°F	268 hours	44.12 mm / 1.74 In	4 days	1016 mb / 30 In
2013	23°C / 73°F	15°C / 59°F	19°C / 66°F	247 hours	43.89 mm / 1.73 In	4 days	1016 mb / 30 In
2014	22°C / 71°F	13°C / 55°F	17°C / 63°F	238 hours	97.90 mm / 3.85 In	6 days	1018 mb / 31 In
2015	24°C / 75°F	16°C / 60°F	20°C / 67°F	209 hours	95.76 mm / 3.77 In	5 days	1018 mb / 31 In
2016	24°C / 75°F	17°C / 62°F	20°C / 68°F	215 hours	75.73 mm / 2.98 In	9 days	1017 mb / 31 In
2017	25°C / 77°F	17°C / 63°F	21°C / 70°F	304 hours	33.82 mm / 1.33 In	4 days	1017 mb / 31 In
2018	24°C / 75°F	17°C / 63°F	21°C / 69°F	218 hours	117.44 mm / 4.62 In	9 days	1019 mb / 31 In
2019	24°C / 76°F	18°C / 64°F	21°C / 70°F	179 hours	191.23 mm / 7.53 In	12 days	1016 mb / 30 In
2020	22°C / 72°F	15°C / 59°F	19°C / 65°F	226 hours	123.98 mm / 4.88 In	6 days	1017 mb / 31 In
2021	26°C / 79°F	17°C / 63°F	21°C / 70°F	252 hours	42.00 mm / 1.65 In	6 days	1014 mb / 30 In
2022	24°C / 75°F	16°C / 60°F	20°C / 67°F	233 hours	66.60 mm / 2.62 In	5 days	1017 mb / 31 In
2023	26°C / 79°F	16°C / 61°F	21°C / 69°F	188 hours	131.92 mm / 5.19 In	4 days	1017 mb / 31 In
2024	26°C / 79°F	17°C / 62°F	21°C / 70°F	236 hours	22.68 mm / 0.89 In	2 days	1017 mb / 31 In

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