Winter 2017 Weather History at Seattle-Tacoma International Airport Washington, United States

This report shows the past weather for Seattle-Tacoma International Airport, providing a weather history for the winter of 2017. It features all historical weather data series we have available, including the Seattle-Tacoma International Airport temperature history for the winter of 2017. You can drill down from year to month and even day level reports by clicking on the graphs.

Seattle-Tacoma International Airport Temperature History in the Winter of 2017

Temperature history in the Winter of 2017 at Seattle-Tacoma International AirportDecJanFeb20°F20°F25°F25°F30°F30°F35°F35°F40°F40°F45°F45°F50°F50°F55°F55°F60°F60°F65°F65°F70°F70°F75°F75°FFallSpring
The daily range of reported temperatures (gray bars) and 24-hour highs (red ticks) and lows (blue ticks), placed over the daily average high (faint red line) and low (faint blue line) temperature, with 25th to 75th and 10th to 90th percentile bands.

Hourly Temperature in the Winter of 2017 at Seattle-Tacoma International Airport

Hourly Temperature in the Winter of 2017 at Seattle-Tacoma International AirportDecJanFeb12 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMFallSpringvery coldcold
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The hourly reported temperature, color coded into bands. The shaded overlays indicate night and civil twilight.
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Cloud Cover in the Winter of 2017 at Seattle-Tacoma International Airport

Cloud Cover in the Winter of 2017 at Seattle-Tacoma International AirportDecJanFeb12 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMFallSpring
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
no significant cloudno cloud detectedceiling and visibility ok
The hourly reported cloud coverage, categorized by the percentage of the sky covered by clouds.

Daily Precipitation in the Winter of 2017 at Seattle-Tacoma International Airport

Daily Precipitation in the Winter of 2017 at Seattle-Tacoma International AirportDecJanFeb0.0 in0.0 in0.5 in0.5 in1.0 in1.0 in1.5 in1.5 in2.0 in2.0 in2.5 in2.5 in3.0 in3.0 inFallSpring
The daily measured quantity of liquid or liquid-equivalent precipitation.

Snow Depth in the Winter of 2017 at Seattle-Tacoma International Airport

Snow Depth in the Winter of 2017 at Seattle-Tacoma International AirportDecJanFeb0 in0 in1 in1 in2 in2 in3 in3 in4 in4 inFallSpring
The daily measured snow depth, where available.

Observed Weather in the Winter of 2017 at Seattle-Tacoma International Airport

Observed Weather in the Winter of 2017 at Seattle-Tacoma International AirportDecJanFeb12 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMFallSpring
foghazedrizzlelight rainmoderate rainheavy rainfreezing rainsleetsnow grainslight snowmoderate snowheavy snowhailthunderstorm
The hourly observed weather, color coded by category (in order of severity). If multiple reports are present, the most severe code is shown.
DayObservationsPrecipitationCodes
Fri, Dec 1 Light Rain, Mist0.27 in-RA, BR
Sat, Dec 2 Rain, Light Rain, Mist0.79 inRA, -RA, BR
Sun, Dec 3 Light Rain, Mist0.05 in-RA, BR
Mon, Dec 4 Fog, Mist, Patches of FogFG, BR, BCFG
Tue, Dec 5 Fog, MistFG, BR
Fri, Dec 8 Haze, Fog, Freezing Fog, Mist, Patches of FogHZ, FG, FZFG, BR, BCFG
Sat, Dec 9 Fog, Mist, Patches of FogFG, BR, BCFG
Mon, Dec 11 Fog, Freezing Fog, Mist, Patches of FogFG, FZFG, BR, BCFG
Fri, Dec 15 Light Rain, Fog, Mist0.06 in-RA, FG, BR
Sat, Dec 16 Light Rain, Mist0.14 in-RA, BR
Sun, Dec 17 Light Rain, Haze, Mist0.03 in-RA, HZ, BR
Mon, Dec 18 Rain, Light Rain, Mist0.68 inRA, -RA, BR
Tue, Dec 19 Rain, Light Rain, Mist1.01 inRA, -RA, BR
Wed, Dec 20 Light Rain, Mist0.13 in-RA, BR
Thu, Dec 21 Light Rain, Light Drizzle, Mist0.01 in-RA, -DZ, BR
Fri, Dec 22 Light Rain, Light Drizzle, Mist0.09 in-RA, -DZ, BR
Sun, Dec 24 Light Snow, Mist0.12 in-SN, BR
Mon, Dec 25 Light Snow, Mist0.09 in-SN, BR
Tue, Dec 26 MistBR
Wed, Dec 27 MistBR
Thu, Dec 28 Light Rain, Mist0.34 in-RA, BR
Fri, Dec 29 Rain, Light Rain, Mist1.50 inRA, -RA, BR
Sat, Dec 30 Light Rain, Mist0.11 in-RA, BR
Sun, Dec 31 Fog, MistFG, BR
Mon, Jan 1 Patches of FogBCFG
Thu, Jan 4 Light Rain0.13 in-RA
Fri, Jan 5 Rain, Light Rain, Mist, Patches of Fog0.42 inRA, -RA, BR, BCFG
Sat, Jan 6 Light Rain, Mist0.17 in-RA, BR
Sun, Jan 7 Light Rain, Mist0.33 in-RA, BR
Mon, Jan 8 Light Rain, Light Drizzle, Mist, Patches of Fog0.14 in-RA, -DZ, BR, BCFG
Tue, Jan 9 Light Rain, Light Drizzle, Mist0.20 in-RA, -DZ, BR
Wed, Jan 10 Light Rain, Mist0.17 in-RA, BR
Thu, Jan 11 Rain, Light Rain, Mist1.12 inRA, -RA, BR
Fri, Jan 12 Light Rain, Mist0.10 in-RA, BR
Sat, Jan 13 Light Rain, Mist0.01 in-RA, BR
Sun, Jan 14 MistBR
Mon, Jan 15 Light Rain, Fog, Mist, Patches of Fog0.06 in-RA, FG, BR, BCFG
Tue, Jan 16 Light Rain, Mist0.19 in-RA, BR
Wed, Jan 17 Rain, Light Rain, Mist0.43 inRA, -RA, BR
Thu, Jan 18 Rain, Light Rain, Mist0.40 inRA, -RA, BR
Fri, Jan 19 Light Rain0.02 in-RA
Sat, Jan 20 Light Rain0.09 in-RA
Sun, Jan 21 Rain, Light Rain, Mist0.11 inRA, -RA, BR
Mon, Jan 22 Rain, Light Rain, Mist0.36 inRA, -RA, BR
Tue, Jan 23 Rain, Light Rain, Mist0.87 inRA, -RA, BR
Wed, Jan 24 Rain, Light Rain, Mist0.44 inRA, -RA, BR
Thu, Jan 25 Light Rain, Mist0.15 in-RA, BR
Fri, Jan 26 Light Rain, Light Drizzle, Mist0.40 in-RA, -DZ, BR
Sat, Jan 27 Rain, Light Rain, Mist0.56 inRA, -RA, BR
Sun, Jan 28 Light Rain, Mist0.06 in-RA, BR
Mon, Jan 29 Rain, Light Rain, Mist1.09 inRA, -RA, BR
Thu, Feb 1 Rain, Light Rain, Mist0.57 inRA, -RA, BR
Fri, Feb 2 Light Rain, Mist0.08 in-RA, BR
Sat, Feb 3 Light Rain, Mist0.14 in-RA, BR
Mon, Feb 5 Light Rain, Light Drizzle, Mist0.03 in-RA, -DZ, BR
Tue, Feb 6 Light Rain, Light Drizzle, Mist0.05 in-RA, -DZ, BR
Thu, Feb 8 Light Rain, Light Drizzle, Mist0.05 in-RA, -DZ, BR
Fri, Feb 9 Light Rain0.00 in-RA
Sun, Feb 11 MistBR
Tue, Feb 13 Light Rain0.14 in-RA
Wed, Feb 14 Light Rain, Light Drizzle, Mist0.10 in-RA, -DZ, BR
Thu, Feb 15 Light Rain, Mist0.01 in-RA, BR
Fri, Feb 16 Light Rain, Light Drizzle, Mist0.11 in-RA, -DZ, BR
Sat, Feb 17 Light Rain, Mist0.30 in-RA, BR
Sun, Feb 18 Snow, Light Snow, Light Rain, Mist0.06 inSN, -SN, -RA, BR
Tue, Feb 20 Light Snow0.00 in-SN
Wed, Feb 21 Light Snow, Mist0.03 in-SN, BR
Thu, Feb 22 Light Snow, Mist0.00 in-SN, BR
Fri, Feb 23 Light Snow, Light Rain and Snow, Light Rain, Mist0.03 in-SN, -RASN, -RA, BR
Sat, Feb 24 Light Rain, Mist0.03 in-RA, BR
Sun, Feb 25 Light Rain0.20 in-RA
Wed, Feb 28 Light Rain0.15 in-RA

Hours of Daylight and Twilight in the Winter of 2017 at Seattle-Tacoma International Airport

Hours of Daylight and Twilight in the Winter of 2017 at Seattle-Tacoma International AirportDecJanFeb0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrFallSpringDec 218 hr, 27 minDec 218 hr, 27 minnightnightdaydayFeb 2811 hr, 2 minFeb 2811 hr, 2 min
The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

Sunrise & Sunset with Twilight and Daylight Saving Time in the Winter of 2017 at Seattle-Tacoma International Airport

Sunrise & Sunset with Twilight and Daylight Saving Time in the Winter of 2017 at Seattle-Tacoma International AirportDecJanFeb12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMFallSpring6:51 AM6:51 AMFeb 285:52 PMFeb 285:52 PM7:46 AM7:46 AMDec 104:18 PMDec 104:18 PM7:56 AM7:56 AMDec 314:28 PMDec 314:28 PM
The solar day over the course of the Winter of 2017. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.

Solar Elevation and Azimuth in the Winter of 2017 at Seattle-Tacoma International Airport

Solar Elevation and Azimuth in the Winter of 2017 at Seattle-Tacoma International AirportDecJanFeb12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMFallSpring01001020
northeastsouthwest
Solar elevation and azimuth in the the winter of 2017. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

Moon Rise, Set & Phases in the Winter of 2017 at Seattle-Tacoma International Airport

Moon Rise, Set & Phases in the Winter of 2017 at Seattle-Tacoma International AirportDecJanFeb12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMFallSpringNov 310:24 PMNov 310:24 PMNov 183:43 AMNov 183:43 AMDec 37:48 AMDec 37:48 AMDec 1710:31 PMDec 1710:31 PMJan 16:25 PMJan 16:25 PMJan 166:18 PMJan 166:18 PMJan 315:27 AMJan 315:27 AMFeb 151:06 PMFeb 151:06 PMMar 14:52 PMMar 14:52 PMMar 176:12 AMMar 176:12 AMMar 315:38 AMMar 315:38 AM6:05 PM6:05 PM8:16 AM8:16 AM4:12 PM4:12 PM7:21 AM7:21 AM7:03 AM7:03 AM4:25 PM4:25 PM4:33 PM4:33 PM8:19 AM8:19 AM7:28 AM7:28 AM4:45 PM4:45 PM4:25 PM4:25 PM7:44 AM7:44 AM7:18 AM7:18 AM5:35 PM5:35 PM5:45 PM5:45 PM7:25 AM7:25 AM7:44 AM7:44 AM7:39 PM7:39 PM6:50 PM6:50 PM
The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.

Humidity Comfort Levels in the Winter of 2017 at Seattle-Tacoma International Airport

Humidity Comfort Levels in the Winter of 2017 at Seattle-Tacoma International AirportDecJanFeb12 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMFallSpring
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The hourly reported humidity comfort level, categorized by dew point. The shaded overlays indicate night and civil twilight.

Wind Speed in the Winter of 2017 at Seattle-Tacoma International Airport

Wind Speed in the Winter of 2017 at Seattle-Tacoma International AirportDecJanFeb0 mph0 mph10 mph10 mph20 mph20 mph30 mph30 mph40 mph40 mph50 mph50 mphFallSpring
The daily range of reported wind speeds (gray bars), with maximum gust speeds (red ticks).

Hourly Wind Speed in the Winter of 2017 at Seattle-Tacoma International Airport

Hourly Wind Speed in the Winter of 2017 at Seattle-Tacoma International AirportDecJanFeb12 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMFallSpring
0 mph calm 1 mph light air 4 mph light breeze 8 mph gentle breeze 13 mph moderate breeze 18 mph fresh breeze 25 mph strong breeze 31 mph near gale 39 mph gale 47 mph strong gale 55 mph storm 64 mph violent storm 73 mph hurricane force
The hourly reported wind speed, color coded into bands according to the Beaufort scale. The shaded overlays indicate night and civil twilight.

Hourly Wind Direction in 2017 at Seattle-Tacoma International Airport

Hourly Wind Direction in 2017 at Seattle-Tacoma International AirportDecJanFeb12 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMFallSpring
calmnortheastsouthwest
The hourly reported wind direction, color coded by compass point. The shaded overlays indicate night and civil twilight.

Atmospheric Pressure in the Winter of 2017 at Seattle-Tacoma International Airport

Atmospheric Pressure in the Winter of 2017 at Seattle-Tacoma International AirportDecJanFeb29.4 inHg29.4 inHg29.6 inHg29.6 inHg29.8 inHg29.8 inHg30.0 inHg30.0 inHg30.2 inHg30.2 inHg30.4 inHg30.4 inHg30.6 inHg30.6 inHg30.8 inHg30.8 inHgFallSpring
The daily range of atmospheric pressure (gray bars), as measured by the altimeter setting reported in e.g. a METAR report.

Number of Reports by Day in the Winter of 2017 at Seattle-Tacoma International Airport 2017

Number of Reports by Day in the Winter of 2017 at Seattle-Tacoma International AirportDecJanFeb005050100100FallSpring
regularspecialcorrection
The number of reports per day.

Reports by Hour in the Winter of 2017 at Seattle-Tacoma International Airport 2017

Reports by Hour in the Winter of 2017 at Seattle-Tacoma International AirportDecJanFeb12 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMFallSpring
regularspecialcorrection
Indication of what types of reports were recorded during each hour.

This report graphically illustrates the historical weather reports recorded by the weather station at Seattle-Tacoma International Airport in the winter of 2017.

METAR Reports

Airport weather stations throughout the world routinely issue METAR weather reports . Such reports are used by pilots, air traffic controllers, meteorologists, climatologists, and other researchers. They are published via radio transmission and on the internet. We have been collecting and archiving published METAR reports since 2011, and have found third-party sources for archived reports from years prior to that.

ISD Reports

The Integrated Surface Database (ISD), maintained and published by NOAA's National Center for Environmental Information , consists of hourly and synoptic weather reports from a variety of sources. We use ISD data to complement and backfill for our METAR archive.

Other Data

The sources for the averages shown in the daily temperature chart are discussed in greater detail on this station's Averages Report.

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for airports and weather stations are provided by AskGeo.com .

Maps are © OpenStreetMap contributors.

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