Mercer Island August Weather Averages Washington, United States of America

August Weather Averages for Mercer Island

High Temp	26°C	78°F
Low Temp	14°C	57°F
Avg Temp	19°C	67°F
Sunshine Hours	271 hours
Rainfall	22.99 mm	0.91 In
Rain days	3 days
Pressure	1016 mb	30 In

Mercer Island August Averages Year by Year

Year	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
2009	25°C / 77°F	13°C / 55°F	18°C / 65°F	292 hours	33.60 mm / 1.32 In	3 days	1017 mb / 31 In
2010	24°C / 76°F	12°C / 54°F	18°C / 64°F	292 hours	36.60 mm / 1.44 In	4 days	1015 mb / 30 In
2011	24°C / 76°F	12°C / 54°F	18°C / 64°F	308 hours	7.20 mm / 0.28 In	1 days	1016 mb / 30 In
2012	26°C / 78°F	13°C / 56°F	19°C / 66°F	318 hours	1.80 mm / 0.07 In	0 days	1016 mb / 30 In
2013	26°C / 78°F	14°C / 57°F	19°C / 67°F	266 hours	44.90 mm / 1.77 In	3 days	1015 mb / 30 In
2014	26°C / 79°F	14°C / 58°F	20°C / 68°F	302 hours	30.80 mm / 1.21 In	5 days	1016 mb / 30 In
2015	25°C / 76°F	14°C / 56°F	19°C / 66°F	246 hours	61.51 mm / 2.42 In	5 days	1015 mb / 30 In
2016	24°C / 76°F	13°C / 56°F	19°C / 66°F	241 hours	22.51 mm / 0.89 In	3 days	1016 mb / 30 In
2017	28°C / 83°F	15°C / 60°F	21°C / 70°F	318 hours	12.70 mm / 0.50 In	2 days	1016 mb / 30 In
2018	27°C / 80°F	15°C / 59°F	20°C / 69°F	264 hours	8.80 mm / 0.35 In	1 days	1017 mb / 30 In
2019	26°C / 78°F	14°C / 58°F	19°C / 67°F	229 hours	15.70 mm / 0.62 In	3 days	1016 mb / 30 In
2020	25°C / 77°F	14°C / 57°F	20°C / 67°F	254 hours	10.30 mm / 0.41 In	3 days	1016 mb / 30 In
2021	25°C / 78°F	14°C / 58°F	20°C / 68°F	228 hours	18.40 mm / 0.72 In	3 days	1015 mb / 30 In
2022	29°C / 84°F	14°C / 58°F	21°C / 70°F	289 hours	6.00 mm / 0.24 In	0 days	1015 mb / 30 In
2023	27°C / 81°F	14°C / 57°F	20°C / 68°F	225 hours	34.00 mm / 1.34 In	2 days	1016 mb / 30 In

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