Ottawa September Weather Averages Illinois, United States of America

September Weather Averages for Ottawa

High Temp	25°C	77°F
Low Temp	14°C	57°F
Avg Temp	19°C	66°F
Sunshine Hours	236 hours
Rainfall	82.79 mm	3.26 In
Rain days	6 days
Pressure	1017 mb	31 In

Ottawa September Averages Year by Year

Year	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
2008	24°C / 74°F	14°C / 57°F	18°C / 65°F	225 hours	259.57 mm / 10.22 In	8 days	1018 mb / 31 In
2009	24°C / 75°F	13°C / 55°F	18°C / 64°F	221 hours	35.13 mm / 1.38 In	4 days	1018 mb / 31 In
2010	24°C / 75°F	13°C / 56°F	18°C / 65°F	236 hours	120.63 mm / 4.75 In	9 days	1015 mb / 30 In
2011	21°C / 69°F	12°C / 54°F	16°C / 61°F	208 hours	111.27 mm / 4.38 In	11 days	1016 mb / 30 In
2012	23°C / 73°F	12°C / 53°F	17°C / 63°F	240 hours	60.92 mm / 2.40 In	5 days	1016 mb / 30 In
2013	25°C / 77°F	14°C / 57°F	19°C / 67°F	268 hours	56.03 mm / 2.21 In	3 days	1016 mb / 30 In
2014	23°C / 73°F	12°C / 54°F	17°C / 63°F	253 hours	112.58 mm / 4.43 In	7 days	1018 mb / 31 In
2015	26°C / 79°F	15°C / 60°F	20°C / 69°F	224 hours	85.24 mm / 3.36 In	5 days	1017 mb / 31 In
2016	25°C / 77°F	16°C / 61°F	20°C / 69°F	209 hours	61.09 mm / 2.41 In	8 days	1017 mb / 31 In
2017	26°C / 79°F	14°C / 58°F	20°C / 68°F	295 hours	22.80 mm / 0.90 In	3 days	1017 mb / 31 In
2018	24°C / 76°F	15°C / 59°F	20°C / 67°F	206 hours	123.93 mm / 4.88 In	9 days	1018 mb / 31 In
2019	25°C / 77°F	16°C / 62°F	21°C / 69°F	200 hours	234.16 mm / 9.22 In	13 days	1016 mb / 30 In
2020	23°C / 73°F	13°C / 55°F	18°C / 64°F	222 hours	110.29 mm / 4.34 In	6 days	1017 mb / 31 In
2021	28°C / 82°F	16°C / 60°F	21°C / 70°F	278 hours	38.90 mm / 1.53 In	4 days	1015 mb / 30 In
2022	26°C / 79°F	14°C / 57°F	20°C / 68°F	255 hours	61.50 mm / 2.42 In	6 days	1017 mb / 31 In
2023	29°C / 83°F	13°C / 55°F	20°C / 68°F	211 hours	66.85 mm / 2.63 In	2 days	1017 mb / 31 In
2024	27°C / 81°F	14°C / 57°F	20°C / 68°F	246 hours	23.27 mm / 0.92 In	1 days	1017 mb / 31 In

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