Seatac Weather History Washington, United States of America

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Daily and hourly data from 1 Jan 2009 onwards.
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Sun 06 Sep, 2026 Weather in Seatac

Sunrise: 06:34 AM Sunset: 07:40 PM	Moonrise: 12:10 AM Moonset: 05:21 PM	Max: 23.2 °c	Min: 11.8 °c	Avg: 17.3 °c	Precip: 0.00 mm	Max Wind: 11.9 kph

	Sun 06 0:00 am	Sun 06 3:00 am	Sun 06 6:00 am	Sun 06 9:00 am	Sun 06 12:00 pm	Sun 06 3:00 pm	Sun 06 6:00 pm	Sun 06 9:00 pm
Icon
Temp	14.5°c	12.8°c	12.0°c	15.2°c	20.8°c	23.1°c	22.7°c	17.2°c
Wind	6.5 kmph	4.7 kmph	4.0 kmph	6.8 kmph	9.4 kmph	11.9 kmph	8.3 kmph	4.3 kmph
Precip	0.00 mm	0.00 mm	0.00 mm	0.00 mm	0.00 mm	0.00 mm	0.00 mm	0.00 mm
Cloud	0%	86%	72%	100%	0%	0%	0%	0%
Humidity	68%	77%	81%	76%	57%	39%	35%	60%
Pressure	1016 mb	1016 mb	1016 mb	1016 mb	1015 mb	1014 mb	1014 mb	1015 mb

Seatac Annual Weather Averages

Month	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
January	7°C / 45°F	2°C / 36°F	4°C / 40°F	107 hours	177.48 mm / 6.99 In	12 days	1019 mb / 31 In
February	8°C / 46°F	2°C / 35°F	5°C / 40°F	86 hours	134.12 mm / 5.28 In	11 days	1018 mb / 31 In
March	10°C / 51°F	3°C / 38°F	6°C / 44°F	95 hours	157.86 mm / 6.22 In	13 days	1016 mb / 30 In
April	14°C / 56°F	5°C / 41°F	9°C / 48°F	114 hours	111.51 mm / 4.39 In	10 days	1017 mb / 31 In
May	18°C / 64°F	8°C / 47°F	13°C / 55°F	153 hours	77.23 mm / 3.04 In	7 days	1017 mb / 31 In
June	21°C / 70°F	11°C / 51°F	16°C / 61°F	170 hours	54.04 mm / 2.13 In	5 days	1016 mb / 30 In
July	26°C / 78°F	14°C / 56°F	19°C / 67°F	239 hours	15.56 mm / 0.61 In	2 days	1017 mb / 31 In
August	26°C / 78°F	14°C / 58°F	20°C / 67°F	245 hours	28.26 mm / 1.11 In	3 days	1016 mb / 30 In
September	22°C / 71°F	12°C / 53°F	16°C / 61°F	201 hours	74.02 mm / 2.91 In	6 days	1016 mb / 30 In
October	15°C / 60°F	8°C / 47°F	11°C / 52°F	163 hours	146.94 mm / 5.79 In	10 days	1017 mb / 31 In
November	10°C / 49°F	4°C / 40°F	7°C / 44°F	103 hours	211.89 mm / 8.34 In	14 days	1017 mb / 31 In
December	7°C / 44°F	2°C / 36°F	4°C / 39°F	96 hours	203.16 mm / 8.00 In	13 days	1018 mb / 31 In

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