Decatur August Weather Averages Illinois, United States of America

August Weather Averages for Decatur

High Temp	28°C	82°F
Low Temp	18°C	65°F
Avg Temp	23°C	73°F
Sunshine Hours	236 hours
Rainfall	89.11 mm	3.51 In
Rain days	8 days
Pressure	1015 mb	30 In

Decatur August Averages Year by Year

Year	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
2009	27°C / 81°F	17°C / 63°F	22°C / 71°F	254 hours	79.20 mm / 3.12 In	7 days	1016 mb / 30 In
2010	31°C / 88°F	20°C / 67°F	25°C / 77°F	327 hours	59.70 mm / 2.35 In	4 days	1014 mb / 30 In
2011	28°C / 83°F	18°C / 65°F	23°C / 74°F	286 hours	42.94 mm / 1.69 In	7 days	1013 mb / 30 In
2012	28°C / 82°F	18°C / 64°F	22°C / 72°F	227 hours	122.45 mm / 4.82 In	7 days	1014 mb / 30 In
2013	28°C / 82°F	18°C / 64°F	23°C / 73°F	286 hours	15.40 mm / 0.61 In	6 days	1017 mb / 30 In
2014	28°C / 82°F	19°C / 65°F	23°C / 73°F	188 hours	106.78 mm / 4.20 In	13 days	1015 mb / 30 In
2015	27°C / 81°F	17°C / 63°F	22°C / 72°F	260 hours	45.56 mm / 1.79 In	8 days	1015 mb / 30 In
2016	28°C / 82°F	20°C / 68°F	24°C / 75°F	202 hours	117.03 mm / 4.61 In	12 days	1016 mb / 30 In
2017	26°C / 78°F	16°C / 62°F	21°C / 70°F	268 hours	92.52 mm / 3.64 In	8 days	1016 mb / 30 In
2018	28°C / 82°F	19°C / 66°F	23°C / 74°F	255 hours	161.28 mm / 6.35 In	12 days	1015 mb / 30 In
2019	27°C / 80°F	18°C / 65°F	22°C / 72°F	241 hours	139.26 mm / 5.48 In	11 days	1015 mb / 30 In
2020	27°C / 80°F	18°C / 64°F	22°C / 72°F	176 hours	56.00 mm / 2.20 In	4 days	1014 mb / 30 In
2021	28°C / 83°F	20°C / 67°F	24°C / 75°F	159 hours	102.40 mm / 4.03 In	7 days	1016 mb / 30 In
2022	30°C / 85°F	18°C / 65°F	24°C / 75°F	201 hours	69.07 mm / 2.72 In	8 days	1015 mb / 30 In
2023	30°C / 86°F	18°C / 64°F	24°C / 74°F	206 hours	156.70 mm / 6.17 In	9 days	1013 mb / 30 In
2024	28°C / 82°F	18°C / 64°F	23°C / 73°F	242 hours	59.47 mm / 2.34 In	3 days	1016 mb / 30 In

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