July 2018 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 July 2018. It features all historical weather data series we have available, including the Seattle-Tacoma International Airport temperature history for July 2018. You can drill down from year to month and even day level reports by clicking on the graphs.

Seattle-Tacoma International Airport Temperature History July 2018

Temperature history in July 2018 at Seattle-Tacoma International Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313145°F45°F50°F50°F55°F55°F60°F60°F65°F65°F70°F70°F75°F75°F80°F80°F85°F85°F90°F90°F95°F95°FJunAug
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 July 2018 at Seattle-Tacoma International Airport

Hourly Temperature in July 2018 at Seattle-Tacoma International Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMJunAugcoolwarmhotcomfortable
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 July 2018 at Seattle-Tacoma International Airport

Cloud Cover in July 2018 at Seattle-Tacoma International Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMJunAug
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 July 2018 at Seattle-Tacoma International Airport

Daily Precipitation in July 2018 at Seattle-Tacoma International Airport1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310.0 in0.0 in0.2 in0.2 in0.4 in0.4 in0.6 in0.6 in0.8 in0.8 in1.0 in1.0 in1.2 in1.2 inJunAug
The daily measured quantity of liquid or liquid-equivalent precipitation.

Observed Weather in July 2018 at Seattle-Tacoma International Airport

Observed Weather in July 2018 at Seattle-Tacoma International Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMJunAug
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
Sun, Jul 1 Light Rain, Light Drizzle, Mist0.04 in-RA, -DZ, BR
Mon, Jul 9 Light Rain0.00 in-RA
Tue, Jul 10 Light Rain, Mist0.00 in-RA, BR

Hours of Daylight and Twilight in July 2018 at Seattle-Tacoma International Airport

Hours of Daylight and Twilight in July 2018 at Seattle-Tacoma International Airport1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrJunAugnightnightdaydayJul 3114 hr, 58 minJul 3114 hr, 58 minJul 1115 hr, 41 minJul 1115 hr, 41 minJul 2115 hr, 22 minJul 2115 hr, 22 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 in July 2018 at Seattle-Tacoma International Airport

Sunrise & Sunset with Twilight in July 2018 at Seattle-Tacoma International Airport1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031312 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMJunAug5:16 AM5:16 AMJul 19:09 PMJul 19:09 PM5:46 AM5:46 AMJul 318:44 PMJul 318:44 PM5:23 AM5:23 AMJul 119:05 PMJul 119:05 PM5:34 AM5:34 AMJul 218:56 PMJul 218:56 PM
The solar day over the course of July 2018. 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 July 2018 at Seattle-Tacoma International Airport

Solar Elevation and Azimuth in July 2018 at Seattle-Tacoma International AirportJul112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 AMJunAug0010102020303040405050606000101020203030404050506060
northeastsouthwest
Solar elevation and azimuth over the course of July 2018. 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 July 2018 at Seattle-Tacoma International Airport

Moon Rise, Set & Phases in July 2018 at Seattle-Tacoma International Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMJunAugJun 279:54 PMJun 279:54 PMJul 127:49 PMJul 127:49 PMJul 271:21 PMJul 271:21 PM8:46 PM8:46 PM5:49 AM5:49 AM4:58 AM4:58 AM8:52 PM8:52 PM8:54 PM8:54 PM6:27 AM6:27 AM
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.
Jul 2018IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
91%-8:34 AMWSW11:25 PMESE3:43 AMS251,877 mi
2
84%-9:35 AMWSW11:53 PMESE4:29 AMS250,890 mi
3
77%-10:37 AMWSW-5:14 AMS249,280 mi
4
68%12:19 AMESE11:40 AMW-5:58 AMS247,028 mi
5
58%12:43 AME12:45 PMW-6:42 AMS244,156 mi
6
50%1:07 AME1:51 PMW-7:27 AMS240,750 mi
7
37%1:33 AME3:00 PMWNW-8:14 AMS236,964 mi
8
26%2:01 AMENE4:12 PMWNW-9:03 AMS233,030 mi
9
16%2:33 AMENE5:26 PMWNW-9:56 AMS229,251 mi
10
8%3:12 AMENE6:40 PMWNW-10:53 AMS225,976 mi
11
3%4:00 AMENE7:50 PMWNW-11:53 AMS223,552 mi
12
0%4:58 AMENE8:52 PMWNW-12:56 PMS222,264 mi
13
1%6:07 AMENE9:45 PMWNW-1:59 PMS222,264 mi
14
5%7:22 AMENE10:28 PMWNW-2:59 PMS223,538 mi
15
12%8:40 AMENE11:04 PMWNW-3:56 PMS225,911 mi
16
21%9:57 AMENE11:35 PMW-4:49 PMS229,096 mi
17
31%11:12 AME--5:40 PMS232,752 mi
18
42%-12:03 AMW12:24 PME6:28 PMS236,550 mi
19
50%-12:29 AMW1:33 PME7:15 PMS240,213 mi
20
64%-12:55 AMWSW2:40 PMESE8:02 PMS243,532 mi
21
73%-1:23 AMWSW3:45 PMESE8:49 PMS246,371 mi
22
82%-1:52 AMWSW4:47 PMESE9:37 PMS248,661 mi
23
89%-2:25 AMWSW5:47 PMESE10:25 PMS250,385 mi
24
94%-3:03 AMWSW6:42 PMESE11:14 PMS251,559 mi
25
96%-3:47 AMWSW7:32 PMESE--
26
98%-4:36 AMWSW8:16 PMESE12:04 AMS252,221 mi
27
100%-5:29 AMWSW8:54 PMESE12:53 AMS252,409 mi
28
100%-6:27 AMWSW9:28 PMESE1:41 AMS252,151 mi
29
98%-7:27 AMWSW9:57 PMESE2:27 AMS251,459 mi
30
94%-8:29 AMWSW10:23 PMESE3:12 AMS250,326 mi
31
88%-9:32 AMW10:48 PME3:57 AMS248,736 mi

Humidity Comfort Levels in July 2018 at Seattle-Tacoma International Airport

Humidity Comfort Levels in July 2018 at Seattle-Tacoma International Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMJunAug
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 July 2018 at Seattle-Tacoma International Airport

Wind Speed in July 2018 at Seattle-Tacoma International Airport1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 mph0 mph5 mph5 mph10 mph10 mph15 mph15 mph20 mph20 mph25 mph25 mph30 mph30 mphJunAug
The daily range of reported wind speeds (gray bars), with maximum gust speeds (red ticks).

Hourly Wind Speed in July 2018 at Seattle-Tacoma International Airport

Hourly Wind Speed in July 2018 at Seattle-Tacoma International Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMJunAug
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 2018 at Seattle-Tacoma International Airport

Hourly Wind Direction in 2018 at Seattle-Tacoma International Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMJunAug
calmnortheastsouthwest
The hourly reported wind direction, color coded by compass point. The shaded overlays indicate night and civil twilight.

Atmospheric Pressure in July 2018 at Seattle-Tacoma International Airport

Atmospheric Pressure in July 2018 at Seattle-Tacoma International Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313129.8 inHg29.8 inHg29.9 inHg29.9 inHg30.0 inHg30.0 inHg30.1 inHg30.1 inHg30.2 inHg30.2 inHg30.3 inHg30.3 inHgJunAug
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 July 2018 at Seattle-Tacoma International Airport Summer 2018

Number of Reports by Day in July 2018 at Seattle-Tacoma International Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313100242448487272JunAug
regularspecialcorrection
The number of reports per day.

Reports by Hour in July 2018 at Seattle-Tacoma International Airport Summer 2018

Reports by Hour in July 2018 at Seattle-Tacoma International Airport18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM3 AM3 AM6 AM6 AM9 AM9 AM12 PM12 PM3 PM3 PM6 PM6 PM9 PM9 PM12 AM12 AMJunAug
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 July 2018.

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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