Alton August Weather Averages Illinois, United States of America

August Weather Averages for Alton

High Temp	29°C	85°F
Low Temp	20°C	67°F
Avg Temp	24°C	76°F
Sunshine Hours	244 hours
Rainfall	110.36 mm	4.34 In
Rain days	8 days
Pressure	1015 mb	30 In

Alton August Averages Year by Year

Year	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
2008	29°C / 85°F	18°C / 65°F	24°C / 74°F	307 hours	59.55 mm / 2.34 In	3 days	1015 mb / 30 In
2009	29°C / 84°F	19°C / 65°F	24°C / 74°F	296 hours	59.40 mm / 2.34 In	5 days	1016 mb / 30 In
2010	33°C / 91°F	21°C / 70°F	26°C / 80°F	319 hours	35.49 mm / 1.40 In	4 days	1014 mb / 30 In
2011	29°C / 85°F	20°C / 68°F	25°C / 76°F	265 hours	71.76 mm / 2.83 In	9 days	1012 mb / 30 In
2012	29°C / 84°F	19°C / 66°F	24°C / 75°F	246 hours	145.68 mm / 5.74 In	6 days	1014 mb / 30 In
2013	29°C / 84°F	19°C / 66°F	24°C / 75°F	261 hours	21.81 mm / 0.86 In	4 days	1016 mb / 30 In
2014	29°C / 85°F	20°C / 68°F	24°C / 76°F	229 hours	129.20 mm / 5.09 In	8 days	1014 mb / 30 In
2015	28°C / 83°F	18°C / 65°F	23°C / 74°F	280 hours	70.96 mm / 2.79 In	7 days	1015 mb / 30 In
2016	29°C / 84°F	21°C / 69°F	25°C / 76°F	169 hours	199.37 mm / 7.85 In	12 days	1016 mb / 30 In
2017	27°C / 81°F	18°C / 64°F	23°C / 73°F	264 hours	117.17 mm / 4.61 In	11 days	1016 mb / 30 In
2018	29°C / 85°F	20°C / 69°F	25°C / 76°F	260 hours	120.48 mm / 4.74 In	9 days	1015 mb / 30 In
2019	28°C / 83°F	20°C / 67°F	24°C / 75°F	237 hours	212.14 mm / 8.35 In	9 days	1014 mb / 30 In
2020	27°C / 81°F	19°C / 66°F	23°C / 73°F	172 hours	103.47 mm / 4.07 In	10 days	1014 mb / 30 In
2021	30°C / 86°F	21°C / 70°F	25°C / 77°F	234 hours	84.95 mm / 3.34 In	9 days	1015 mb / 30 In
2022	30°C / 86°F	20°C / 68°F	25°C / 77°F	222 hours	106.20 mm / 4.18 In	9 days	1015 mb / 30 In
2023	32°C / 89°F	19°C / 67°F	25°C / 77°F	208 hours	227.15 mm / 8.94 In	11 days	1013 mb / 30 In
2024	31°C / 87°F	19°C / 67°F	25°C / 76°F	244 hours	60.53 mm / 2.38 In	1 days	1016 mb / 30 In

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