Dekalb September Weather Averages Illinois, United States of America

September Weather Averages for Dekalb

High Temp	24°C	75°F
Low Temp	13°C	56°F
Avg Temp	18°C	65°F
Sunshine Hours	225 hours
Rainfall	85.48 mm	3.37 In
Rain days	6 days
Pressure	1017 mb	31 In

Dekalb September Averages Year by Year

Year	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
2008	23°C / 73°F	13°C / 56°F	18°C / 64°F	202 hours	250.36 mm / 9.86 In	10 days	1018 mb / 31 In
2009	23°C / 73°F	12°C / 54°F	17°C / 63°F	217 hours	35.76 mm / 1.41 In	3 days	1018 mb / 31 In
2010	23°C / 73°F	13°C / 55°F	17°C / 63°F	226 hours	94.63 mm / 3.73 In	7 days	1015 mb / 30 In
2011	19°C / 67°F	11°C / 52°F	15°C / 60°F	177 hours	104.18 mm / 4.10 In	7 days	1016 mb / 30 In
2012	22°C / 72°F	11°C / 52°F	16°C / 61°F	262 hours	47.90 mm / 1.89 In	6 days	1016 mb / 30 In
2013	24°C / 75°F	13°C / 56°F	18°C / 65°F	245 hours	38.62 mm / 1.52 In	3 days	1016 mb / 30 In
2014	22°C / 72°F	11°C / 52°F	16°C / 62°F	244 hours	93.87 mm / 3.70 In	6 days	1018 mb / 31 In
2015	25°C / 77°F	15°C / 59°F	19°C / 67°F	218 hours	61.40 mm / 2.42 In	6 days	1017 mb / 31 In
2016	24°C / 75°F	15°C / 59°F	19°C / 67°F	204 hours	72.76 mm / 2.86 In	7 days	1017 mb / 31 In
2017	25°C / 76°F	14°C / 57°F	19°C / 66°F	301 hours	26.80 mm / 1.06 In	4 days	1017 mb / 31 In
2018	23°C / 74°F	14°C / 58°F	19°C / 65°F	188 hours	181.55 mm / 7.15 In	11 days	1019 mb / 31 In
2019	23°C / 74°F	16°C / 60°F	19°C / 67°F	160 hours	232.56 mm / 9.16 In	13 days	1016 mb / 30 In
2020	21°C / 70°F	12°C / 54°F	17°C / 62°F	216 hours	135.95 mm / 5.35 In	8 days	1017 mb / 31 In
2021	27°C / 81°F	15°C / 59°F	21°C / 69°F	265 hours	32.20 mm / 1.27 In	4 days	1014 mb / 30 In
2022	24°C / 75°F	13°C / 56°F	18°C / 65°F	237 hours	101.91 mm / 4.01 In	4 days	1017 mb / 31 In
2023	28°C / 82°F	13°C / 55°F	19°C / 67°F	189 hours	75.54 mm / 2.97 In	3 days	1017 mb / 31 In
2024	25°C / 78°F	14°C / 56°F	19°C / 66°F	243 hours	32.02 mm / 1.26 In	2 days	1017 mb / 31 In

Illinois

Hotels Near Dekalb

Cities Near Dekalb

Quick and Easy Signup for Weather API

WeatherAPI.com makes it super easy to integrate our realtime, daily, hourly and 15 min interval weather forecast data, historical weather, marine weather, bulk request, air quality data, autocomplete, time zone, astronomy and sports data into your new or existing project.

Get Started