Seattle December Weather Averages Washington, United States of America

December Weather Averages for Seattle

High Temp	7°C	44°F
Low Temp	2°C	36°F
Avg Temp	4°C	39°F
Sunshine Hours	102 hours
Rainfall	188.35 mm	7.42 In
Rain days	13 days
Pressure	1018 mb	31 In

Seattle December Averages Year by Year

Year	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
2008	4°C / 39°F	-1°C / 30°F	1°C / 35°F	131 hours	160.80 mm / 6.33 In	15 days	1017 mb / 30 In
2009	6°C / 42°F	0°C / 31°F	2°C / 36°F	214 hours	76.00 mm / 2.99 In	8 days	1020 mb / 31 In
2010	6°C / 43°F	2°C / 35°F	4°C / 39°F	102 hours	212.70 mm / 8.37 In	18 days	1013 mb / 30 In
2011	7°C / 45°F	1°C / 34°F	4°C / 38°F	211 hours	76.50 mm / 3.01 In	7 days	1025 mb / 31 In
2012	6°C / 43°F	2°C / 36°F	4°C / 39°F	62 hours	230.67 mm / 9.08 In	20 days	1012 mb / 30 In
2013	5°C / 42°F	0°C / 32°F	2°C / 36°F	143 hours	93.35 mm / 3.68 In	9 days	1025 mb / 31 In
2014	8°C / 46°F	3°C / 37°F	5°C / 41°F	139 hours	177.30 mm / 6.98 In	11 days	1017 mb / 31 In
2015	7°C / 45°F	3°C / 38°F	5°C / 41°F	64 hours	272.53 mm / 10.73 In	15 days	1013 mb / 30 In
2016	4°C / 40°F	0°C / 33°F	2°C / 36°F	101 hours	152.70 mm / 6.01 In	14 days	1021 mb / 31 In
2017	7°C / 45°F	2°C / 35°F	4°C / 39°F	147 hours	173.60 mm / 6.83 In	11 days	1026 mb / 31 In
2018	9°C / 47°F	3°C / 38°F	5°C / 42°F	118 hours	191.69 mm / 7.55 In	11 days	1019 mb / 31 In
2019	8°C / 47°F	4°C / 39°F	6°C / 43°F	39 hours	197.27 mm / 7.77 In	10 days	1016 mb / 30 In
2020	8°C / 47°F	3°C / 37°F	6°C / 42°F	109 hours	209.21 mm / 8.24 In	15 days	1020 mb / 31 In
2021	5°C / 41°F	1°C / 33°F	3°C / 37°F	44 hours	195.00 mm / 7.68 In	16 days	1011 mb / 30 In
2022	5°C / 40°F	0°C / 31°F	2°C / 36°F	51 hours	197.00 mm / 7.76 In	15 days	1015 mb / 30 In
2023	9°C / 48°F	4°C / 39°F	6°C / 43°F	82 hours	227.46 mm / 8.95 In	14 days	1016 mb / 30 In
2024	8°C / 46°F	5°C / 40°F	6°C / 43°F	11 hours	330.59 mm / 13.02 In	12 days	1018 mb / 31 In

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