Mercer Island May Weather Averages Washington, United States of America

May Weather Averages for Mercer Island

High Temp	18°C	65°F
Low Temp	8°C	46°F
Avg Temp	13°C	55°F
Sunshine Hours	171 hours
Rainfall	78.52 mm	3.09 In
Rain days	8 days
Pressure	1017 mb	30 In

Mercer Island May Averages Year by Year

Year	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
2009	18°C / 64°F	6°C / 44°F	12°C / 54°F	229 hours	115.60 mm / 4.55 In	11 days	1017 mb / 31 In
2010	15°C / 60°F	6°C / 42°F	10°C / 51°F	146 hours	121.58 mm / 4.79 In	14 days	1016 mb / 30 In
2011	15°C / 59°F	5°C / 41°F	10°C / 50°F	134 hours	129.10 mm / 5.08 In	11 days	1016 mb / 30 In
2012	17°C / 63°F	6°C / 43°F	12°C / 53°F	188 hours	83.90 mm / 3.30 In	7 days	1018 mb / 31 In
2013	19°C / 66°F	8°C / 46°F	13°C / 56°F	206 hours	69.40 mm / 2.73 In	9 days	1018 mb / 31 In
2014	19°C / 67°F	8°C / 47°F	14°C / 57°F	181 hours	90.10 mm / 3.55 In	10 days	1017 mb / 31 In
2015	19°C / 67°F	8°C / 47°F	14°C / 57°F	203 hours	27.30 mm / 1.07 In	4 days	1015 mb / 30 In
2016	19°C / 66°F	9°C / 48°F	14°C / 57°F	163 hours	46.00 mm / 1.81 In	7 days	1017 mb / 31 In
2017	19°C / 66°F	7°C / 45°F	13°C / 56°F	190 hours	74.90 mm / 2.95 In	8 days	1016 mb / 30 In
2018	21°C / 70°F	10°C / 50°F	15°C / 60°F	201 hours	21.20 mm / 0.83 In	3 days	1017 mb / 31 In
2019	21°C / 69°F	9°C / 49°F	15°C / 59°F	226 hours	43.70 mm / 1.72 In	6 days	1013 mb / 30 In
2020	19°C / 66°F	9°C / 49°F	14°C / 57°F	117 hours	114.62 mm / 4.51 In	10 days	1015 mb / 30 In
2021	18°C / 64°F	8°C / 46°F	13°C / 55°F	142 hours	63.71 mm / 2.51 In	6 days	1019 mb / 31 In
2022	15°C / 59°F	6°C / 43°F	10°C / 50°F	48 hours	148.60 mm / 5.85 In	12 days	1017 mb / 30 In
2023	22°C / 71°F	9°C / 49°F	15°C / 59°F	189 hours	28.15 mm / 1.11 In	2 days	1015 mb / 30 In

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