Waterloo September Weather Averages Illinois, United States of America

September Weather Averages for Waterloo

High Temp	27°C	80°F
Low Temp	17°C	62°F
Avg Temp	21°C	70°F
Sunshine Hours	239 hours
Rainfall	86.93 mm	3.42 In
Rain days	6 days
Pressure	1016 mb	30 In

Waterloo September Averages Year by Year

Year	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
2008	26°C / 78°F	16°C / 61°F	20°C / 69°F	247 hours	158.02 mm / 6.22 In	8 days	1018 mb / 31 In
2009	26°C / 78°F	16°C / 60°F	20°C / 68°F	254 hours	76.10 mm / 3.00 In	6 days	1017 mb / 31 In
2010	26°C / 79°F	16°C / 61°F	21°C / 69°F	269 hours	136.59 mm / 5.38 In	10 days	1015 mb / 30 In
2011	23°C / 73°F	14°C / 57°F	18°C / 65°F	222 hours	113.60 mm / 4.47 In	9 days	1016 mb / 30 In
2012	24°C / 75°F	15°C / 59°F	19°C / 67°F	208 hours	149.49 mm / 5.89 In	10 days	1016 mb / 30 In
2013	28°C / 82°F	17°C / 62°F	22°C / 71°F	260 hours	51.54 mm / 2.03 In	8 days	1015 mb / 30 In
2014	26°C / 78°F	15°C / 59°F	20°C / 68°F	219 hours	62.61 mm / 2.47 In	6 days	1018 mb / 31 In
2015	27°C / 81°F	17°C / 63°F	22°C / 71°F	209 hours	56.53 mm / 2.23 In	4 days	1017 mb / 31 In
2016	27°C / 80°F	18°C / 64°F	22°C / 71°F	243 hours	168.67 mm / 6.64 In	7 days	1017 mb / 31 In
2017	28°C / 82°F	18°C / 64°F	22°C / 72°F	270 hours	33.33 mm / 1.31 In	2 days	1017 mb / 31 In
2018	27°C / 81°F	19°C / 66°F	23°C / 73°F	251 hours	152.80 mm / 6.02 In	6 days	1017 mb / 31 In
2019	29°C / 84°F	20°C / 67°F	24°C / 75°F	278 hours	31.47 mm / 1.24 In	7 days	1017 mb / 30 In
2020	25°C / 77°F	16°C / 61°F	20°C / 68°F	214 hours	46.70 mm / 1.84 In	3 days	1017 mb / 31 In
2021	29°C / 84°F	18°C / 64°F	23°C / 73°F	233 hours	61.50 mm / 2.42 In	6 days	1015 mb / 30 In
2022	28°C / 82°F	16°C / 61°F	21°C / 71°F	248 hours	48.60 mm / 1.91 In	4 days	1017 mb / 30 In
2023	31°C / 88°F	16°C / 61°F	23°C / 73°F	249 hours	52.21 mm / 2.06 In	1 days	1016 mb / 30 In
2024	27°C / 81°F	17°C / 63°F	22°C / 71°F	197 hours	149.11 mm / 5.87 In	4 days	1015 mb / 30 In

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