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 08 Mar, 2026 Weather in Seatac

Sunrise: 06:36 AM Sunset: 06:05 PM	Moonrise: No moonrise Moonset: 08:16 AM	Max: 9.1 °c	Min: 3.1 °c	Avg: 7.0 °c	Precip: 4.40 mm	Max Wind: 23.0 kph

	Sun 08 0:00 am	Sun 08 3:00 am	Sun 08 6:00 am	Sun 08 9:00 am	Sun 08 12:00 pm	Sun 08 3:00 pm	Sun 08 6:00 pm	Sun 08 9:00 pm
Icon
Temp	9.1°c	8.5°c	8.1°c	8.2°c	8.3°c	6.8°c	4.5°c	3.1°c
Wind	22.3 kmph	22.0 kmph	22.7 kmph	18.0 kmph	6.1 kmph	4.0 kmph	10.4 kmph	8.3 kmph
Precip	0.00 mm	0.00 mm	0.70 mm	0.70 mm	0.00 mm	0.00 mm	0.00 mm	0.00 mm
Cloud	99%	100%	100%	92%	88%	96%	100%	100%
Humidity	94%	94%	96%	92%	84%	84%	88%	89%
Pressure	1023 mb	1022 mb	1020 mb	1020 mb	1020 mb	1021 mb	1021 mb	1022 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	98 hours	147.20 mm / 5.80 In	13 days	1016 mb / 30 In
April	13°C / 56°F	5°C / 41°F	9°C / 48°F	113 hours	113.27 mm / 4.46 In	10 days	1018 mb / 31 In
May	18°C / 64°F	8°C / 46°F	13°C / 55°F	161 hours	78.82 mm / 3.10 In	8 days	1017 mb / 31 In
June	21°C / 70°F	11°C / 51°F	16°C / 60°F	180 hours	54.51 mm / 2.15 In	5 days	1016 mb / 30 In
July	26°C / 78°F	14°C / 56°F	19°C / 67°F	253 hours	15.27 mm / 0.60 In	2 days	1017 mb / 31 In
August	26°C / 78°F	14°C / 58°F	20°C / 67°F	259 hours	28.02 mm / 1.10 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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