Seatac Weather History Washington, United States of America

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Past date: Past date must be from 1st Jan, 2009 onwards.

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Daily and hourly data from 1 Jan 2009 onwards.
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Thu 04 Dec, 2025 Weather in Seatac

Sunrise: 07:40 AM Sunset: 04:19 PM	Moonrise: 03:42 PM Moonset: 07:48 AM	Max: 6.4 °c	Min: 3.7 °c	Avg: 4.8 °c	Precip: 47.40 mm	Max Wind: 13.7 kph

	Thu 04 0:00 am	Thu 04 3:00 am	Thu 04 6:00 am	Thu 04 9:00 am	Thu 04 12:00 pm	Thu 04 3:00 pm	Thu 04 6:00 pm	Thu 04 9:00 pm
Icon
Temp	4.2°c	3.8°c	3.7°c	4.1°c	4.7°c	5.3°c	5.9°c	6.4°c
Wind	4.0 kmph	4.3 kmph	4.7 kmph	4.7 kmph	5.4 kmph	6.5 kmph	5.4 kmph	7.6 kmph
Precip	0.00 mm	0.00 mm	0.90 mm	1.90 mm	2.40 mm	5.40 mm	4.50 mm	0.60 mm
Cloud	83%	100%	100%	100%	100%	100%	100%	100%
Humidity	94%	93%	95%	97%	96%	97%	96%	94%
Pressure	1028 mb	1028 mb	1027 mb	1027 mb	1025 mb	1024 mb	1023 mb	1023 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	108 hours	176.26 mm / 6.94 In	12 days	1019 mb / 31 In
February	8°C / 46°F	2°C / 35°F	4°C / 40°F	87 hours	135.99 mm / 5.35 In	12 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	6°C / 44°F	2°C / 35°F	4°C / 39°F	101 hours	191.16 mm / 7.53 In	13 days	1018 mb / 31 In

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