Seattle September Weather Averages Washington, United States of America

September Weather Averages for Seattle

High Temp	22°C	72°F
Low Temp	12°C	53°F
Avg Temp	16°C	61°F
Sunshine Hours	208 hours
Rainfall	77.67 mm	3.06 In
Rain days	6 days
Pressure	1016 mb	30 In

Seattle September Averages Year by Year

Year	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
2008	22°C / 72°F	11°C / 51°F	16°C / 61°F	284 hours	36.20 mm / 1.43 In	4 days	1018 mb / 31 In
2009	22°C / 72°F	11°C / 53°F	16°C / 61°F	271 hours	79.20 mm / 3.12 In	5 days	1017 mb / 31 In
2010	20°C / 68°F	11°C / 53°F	15°C / 59°F	141 hours	123.50 mm / 4.86 In	12 days	1015 mb / 30 In
2011	24°C / 75°F	12°C / 54°F	17°C / 63°F	280 hours	46.70 mm / 1.84 In	5 days	1017 mb / 31 In
2012	23°C / 74°F	11°C / 52°F	16°C / 62°F	320 hours	9.20 mm / 0.36 In	1 days	1019 mb / 31 In
2013	21°C / 70°F	12°C / 54°F	16°C / 61°F	210 hours	187.50 mm / 7.38 In	10 days	1012 mb / 30 In
2014	23°C / 73°F	12°C / 54°F	17°C / 63°F	232 hours	67.30 mm / 2.65 In	5 days	1015 mb / 30 In
2015	20°C / 68°F	11°C / 51°F	15°C / 59°F	187 hours	50.60 mm / 1.99 In	8 days	1016 mb / 30 In
2016	20°C / 68°F	11°C / 51°F	15°C / 59°F	212 hours	73.50 mm / 2.89 In	5 days	1019 mb / 31 In
2017	23°C / 74°F	13°C / 55°F	18°C / 64°F	226 hours	73.30 mm / 2.89 In	7 days	1016 mb / 30 In
2018	21°C / 70°F	11°C / 52°F	16°C / 60°F	196 hours	59.70 mm / 2.35 In	4 days	1017 mb / 30 In
2019	20°C / 68°F	12°C / 53°F	16°C / 60°F	132 hours	141.00 mm / 5.55 In	11 days	1015 mb / 30 In
2020	25°C / 77°F	14°C / 57°F	19°C / 67°F	226 hours	110.40 mm / 4.35 In	6 days	1017 mb / 30 In
2021	21°C / 70°F	11°C / 52°F	16°C / 60°F	161 hours	112.98 mm / 4.45 In	9 days	1016 mb / 30 In
2022	24°C / 76°F	12°C / 54°F	18°C / 64°F	234 hours	7.90 mm / 0.31 In	0 days	1015 mb / 30 In
2023	22°C / 71°F	10°C / 50°F	15°C / 59°F	164 hours	79.95 mm / 3.15 In	5 days	1016 mb / 30 In
2024	21°C / 70°F	12°C / 54°F	16°C / 61°F	138 hours	20.04 mm / 0.79 In	2 days	1016 mb / 30 In

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