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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Mon 20 Oct, 2025 Weather in Seatac

Sunrise: 07:36 AM Sunset: 06:11 PM	Moonrise: 06:52 AM Moonset: 05:37 PM	Max: 13.1 °c	Min: 9.7 °c	Avg: 11.2 °c	Precip: 0.00 mm	Max Wind: 7.2 kph

	Mon 20 0:00 am	Mon 20 3:00 am	Mon 20 6:00 am	Mon 20 9:00 am	Mon 20 12:00 pm	Mon 20 3:00 pm	Mon 20 6:00 pm	Mon 20 9:00 pm
Icon
Temp	10.2°c	9.9°c	9.8°c	10.4°c	12.1°c	13.1°c	12.4°c	11.4°c
Wind	3.2 kmph	5.4 kmph	6.1 kmph	5.0 kmph	7.2 kmph	2.9 kmph	3.2 kmph	2.2 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	80%	87%	94%	81%	81%	81%	82%	59%
Humidity	81%	82%	83%	80%	71%	65%	68%	72%
Pressure	1021 mb	1023 mb	1026 mb	1027 mb	1028 mb	1028 mb	1027 mb	1026 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	16°C / 60°F	8°C / 47°F	11°C / 52°F	165 hours	147.65 mm / 5.81 In	10 days	1017 mb / 31 In
November	10°C / 49°F	4°C / 40°F	7°C / 44°F	107 hours	203.83 mm / 8.02 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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