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October Weather at Salt Lake City International Airport Utah, United States

Daily high temperatures decrease by 15°F, from 72°F to 57°F, rarely falling below 45°F or exceeding 83°F.

Daily low temperatures decrease by 11°F, from 49°F to 39°F, rarely falling below 30°F or exceeding 58°F.

For reference, on July 23, the hottest day of the year, temperatures at Salt Lake City International Airport typically range from 68°F to 93°F, while on January 6, the coldest day of the year, they range from 23°F to 36°F.

Average High and Low Temperature in October at Salt Lake City International Airport

Average High and Low Temperature in October at Salt Lake City International AirportOct112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313120°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°FSepNovOct 172°FOct 172°F49°F49°FOct 3157°FOct 3157°F39°F39°FOct 1167°FOct 1167°F46°F46°FOct 2162°FOct 2162°F42°F42°F
The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on October. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature in October at Salt Lake City International Airport

Average Hourly Temperature in October at Salt Lake City International AirportOct112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 AMSepNovvery coldcoldcoolcomfortablewarmfreezingcomfortable
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 average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Akçadağ, Turkey (6,657 miles away) and Tabriz, Iran (6,825 miles) are the far-away foreign places with temperatures most similar to Salt Lake City International Airport (view comparison).

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The month of October at Salt Lake City International Airport experiences rapidly increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 27% to 39%.

The clearest day of the month is October 1, with clear, mostly clear, or partly cloudy conditions 73% of the time.

For reference, on March 2, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 53%, while on August 18, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 80%.

Cloud Cover Categories in October at Salt Lake City International Airport

Cloud Cover Categories in October at Salt Lake City International AirportOct11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%SepNovOct 173%Oct 173%Oct 3161%Oct 3161%Oct 1169%Oct 1169%Oct 2165%Oct 2165%clearmostly clearpartly cloudymostly cloudyovercast
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. At Salt Lake City International Airport, the chance of a wet day over the course of October is essentially constant, remaining around 17% throughout.

For reference, the year's highest daily chance of a wet day is 27% on April 25, and its lowest chance is 8% on July 4.

Probability of Precipitation in October at Salt Lake City International Airport

Probability of Precipitation in October at Salt Lake City International AirportOct11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%0%2%2%4%4%6%6%8%8%10%10%12%12%14%14%16%16%18%18%20%20%22%22%SepNovOct 118%Oct 118%Oct 3118%Oct 3118%Oct 1117%Oct 1117%Oct 2117%Oct 2117%snowmixedrain
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

Rainfall

To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during October at Salt Lake City International Airport is essentially constant, remaining about 1.3 inches throughout, and rarely exceeding 2.7 inches or falling below 0.1 inches.

The highest average 31-day accumulation is 1.4 inches on October 5.

Average Monthly Rainfall in October at Salt Lake City International Airport

Average Monthly Rainfall in October at Salt Lake City International AirportOct11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310.0 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 inSepNovOct 41.4 inOct 41.4 inOct 311.3 inOct 311.3 inOct 111.4 inOct 111.4 inOct 211.3 inOct 211.3 in
The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average snowfall.

Over the course of October at Salt Lake City International Airport, the length of the day is rapidly decreasing. From the start to the end of the month, the length of the day decreases by 1 hour, 17 minutes, implying an average daily decrease of 2 minutes, 34 seconds, and weekly decrease of 18 minutes, 1 second.

The shortest day of the month is October 31, with 10 hours, 27 minutes of daylight and the longest day is October 1, with 11 hours, 44 minutes of daylight.

Hours of Daylight and Twilight in October at Salt Lake City International Airport

Hours of Daylight and Twilight in October at Salt Lake City International AirportOct11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrSepNovnightnightdaydayOct 111 hr, 44 minOct 111 hr, 44 minOct 3110 hr, 27 minOct 3110 hr, 27 minOct 1611 hr, 4 minOct 1611 hr, 4 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.

The earliest sunrise of the month at Salt Lake City International Airport is 7:25 AM on October 1 and the latest sunrise is 33 minutes later at 7:57 AM on October 31.

The latest sunset is 7:08 PM on October 1 and the earliest sunset is 44 minutes earlier at 6:24 PM on October 31.

Daylight saving time is observed at Salt Lake City International Airport during 2024, but it neither starts nor ends during October, so the entire month is in standard time.

For reference, on June 20, the longest day of the year, the Sun rises at 5:56 AM and sets 15 hours, 6 minutes later, at 9:02 PM, while on December 21, the shortest day of the year, it rises at 7:49 AM and sets 9 hours, 15 minutes later, at 5:03 PM.

Sunrise & Sunset with Twilight and Daylight Saving Time in October at Salt Lake City International Airport

Sunrise & Sunset with Twilight and Daylight Saving Time in October at Salt Lake City International AirportOct11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031312 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMSepNov7:25 AM7:25 AMOct 17:08 PMOct 17:08 PM7:57 AM7:57 AMOct 316:24 PMOct 316:24 PM7:35 AM7:35 AMOct 116:52 PMOct 116:52 PM7:46 AM7:46 AMOct 216:37 PMOct 216:37 PMSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of October. 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.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

Solar Elevation and Azimuth in October at Salt Lake City International Airport

Solar Elevation and Azimuth in October at Salt Lake City International AirportOct112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 AMSepNov001010202020303040500001010202030304050
northeastsouthwest
Solar elevation and azimuth over the course of October 2024. 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).

The figure below presents a compact representation of key lunar data for October 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

Moon Rise, Set & Phases in October at Salt Lake City International Airport

Moon Rise, Set & Phases in October at Salt Lake City International AirportOct112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMSepNovSep 27:56 PMSep 27:56 PMSep 178:35 PMSep 178:35 PMOct 212:50 PMOct 212:50 PMOct 175:27 AMOct 175:27 AMNov 16:48 AMNov 16:48 AMNov 152:29 PMNov 152:29 PMNov 3011:22 PMNov 3011:22 PM6:23 AM6:23 AM8:04 PM8:04 PM7:31 PM7:31 PM7:49 AM7:49 AM7:18 AM7:18 AM7:06 PM7:06 PM6:19 PM6:19 PM7:57 AM7:57 AM8:14 AM8:14 AM6:16 PM6:16 PM4:48 PM4:48 PM8:29 AM8:29 AM7:13 AM7:13 AM4:21 PM4:21 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.
Oct 2024IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
1%6:18 AME6:48 PMW-12:35 PMS252,375 mi
2
0%7:18 AME7:06 PMW-1:13 PMS252,597 mi
3
1%8:18 AMESE7:25 PMWSW-1:52 PMS252,390 mi
4
4%9:19 AMESE7:47 PMWSW-2:33 PMS251,741 mi
5
9%10:22 AMESE8:12 PMWSW-3:17 PMS250,621 mi
6
15%11:26 AMESE8:43 PMWSW-4:04 PMS248,992 mi
7
23%12:31 PMSE9:21 PMSW-4:56 PMS246,824 mi
8
32%1:33 PMSE10:09 PMSW-5:51 PMS244,113 mi
9
42%2:30 PMSE11:07 PMSW-6:48 PMS240,904 mi
10
50%3:19 PMSE--7:47 PMS237,310 mi
11
64%-12:14 AMSW4:01 PMESE8:44 PMS233,521 mi
12
75%-1:27 AMWSW4:35 PMESE9:39 PMS229,802 mi
13
85%-2:43 AMWSW5:04 PMESE10:31 PMS226,474 mi
14
92%-4:01 AMWSW5:30 PME11:22 PMS223,874 mi
15
95%-5:18 AMW5:54 PME--
16
98%-6:37 AMW6:19 PME12:13 AMS222,306 mi
17
100%-7:57 AMWNW6:47 PMENE1:04 AMS221,977 mi
18
99%-9:19 AMWNW7:19 PMENE1:58 AMS222,957 mi
19
95%-10:40 AMWNW7:58 PMNE2:54 AMS225,154 mi
20
88%-11:58 AMNW8:46 PMNE3:54 AMS228,328 mi
21
79%-1:07 PMNW9:43 PMNE4:55 AMS232,139 mi
22
69%-2:04 PMNW10:48 PMNE5:55 AMS236,208 mi
23
58%-2:49 PMNW11:55 PMENE6:52 AMS240,186 mi
24
50%-3:24 PMWNW-7:44 AMS243,795 mi
25
38%1:03 AMENE3:52 PMWNW-8:32 AMS246,847 mi
26
28%2:08 AMENE4:15 PMWNW-9:15 AMS249,238 mi
27
20%3:10 AMENE4:35 PMW-9:56 AMS250,935 mi
28
13%4:11 AME4:54 PMW-10:35 AMS251,957 mi
29
7%5:10 AME5:12 PMW-11:13 AMS252,363 mi
30
3%6:10 AME5:31 PMWSW-11:52 AMS252,228 mi
31
1%7:11 AMESE5:52 PMWSW-12:32 PMS251,630 mi

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

The chance that a given day will be muggy at Salt Lake City International Airport is essentially constant during October, remaining around 0% throughout.

For reference, on August 4, the muggiest day of the year, there are muggy conditions 0% of the time, while on September 21, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in October at Salt Lake City International Airport

Humidity Comfort Levels in October at Salt Lake City International AirportOct11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%SepNovOct 10%Oct 10%Oct 310%Oct 310%Oct 110%Oct 110%Oct 210%Oct 210%drydrycomfortablecomfortable
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed at Salt Lake City International Airport is essentially constant during October, remaining within 0.1 miles per hour of 5.7 miles per hour throughout.

For reference, on April 4, the windiest day of the year, the daily average wind speed is 7.0 miles per hour, while on January 21, the calmest day of the year, the daily average wind speed is 5.3 miles per hour.

The lowest daily average wind speed during October is 5.7 miles per hour on October 28.

Average Wind Speed in October at Salt Lake City International Airport

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The hourly average wind direction at Salt Lake City International Airport throughout October is predominantly from the south, with a peak proportion of 38% on October 31.

Wind Direction in October at Salt Lake City International Airport

Wind Direction in October at Salt Lake City International AirportOct11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%20%80%40%60%60%40%80%20%100%0%SepNovwestsoutheastnorth
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season at Salt Lake City International Airport typically lasts for 6.5 months (200 days), from around April 12 to around October 29, rarely starting before March 14 or after May 3, and rarely ending before October 11 or after November 14.

During October at Salt Lake City International Airport, the chance that a given day is within the growing season is very rapidly decreasing falling from 98% to 43% over the course of the month.

Time Spent in Various Temperature Bands and the Growing Season in October at Salt Lake City International Airport

Time Spent in Various Temperature Bands and the Growing Season in October at Salt Lake City International Airportgrowing seasonOct11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%SepNov98%Oct 198%Oct 1Oct 3143%Oct 3143%90%Oct 1190%Oct 1171%Oct 2171%Oct 21Nov 1410%Nov 1410%freezingvery coldcoldcoolcomfortablewarmhot
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 percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing season.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

The average accumulated growing degree days at Salt Lake City International Airport are increasing during October, increasing by 185°F, from 3,355°F to 3,541°F, over the course of the month.

Growing Degree Days in October at Salt Lake City International Airport

Growing Degree Days in October at Salt Lake City International AirportOct11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031313,100°F3,100°F3,200°F3,200°F3,300°F3,300°F3,400°F3,400°F3,500°F3,500°F3,600°F3,600°F3,700°F3,700°F3,800°F3,800°F3,900°F3,900°FSepNovOct 13,355°FOct 13,355°FOct 313,541°FOct 313,541°FOct 113,443°FOct 113,443°FOct 213,503°FOct 213,503°F
The average growing degree days accumulated over the course of October, with 25th to 75th and 10th to 90th percentile bands.

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy at Salt Lake City International Airport is rapidly decreasing during October, falling by 1.6 kWh, from 4.9 kWh to 3.3 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in October at Salt Lake City International Airport

Average Daily Incident Shortwave Solar Energy in October at Salt Lake City International AirportOct11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWhSepNovOct 14.9 kWhOct 14.9 kWhOct 313.3 kWhOct 313.3 kWhOct 114.4 kWhOct 114.4 kWhOct 213.9 kWhOct 213.9 kWh
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

For the purposes of this report, the geographical coordinates of Salt Lake City International Airport are 40.787 deg latitude, -111.982 deg longitude, and 4,222 ft elevation.

The topography within 2 miles of Salt Lake City International Airport is essentially flat, with a maximum elevation change of 33 feet and an average elevation above sea level of 4,220 feet. Within 10 miles is essentially flat (3,796 feet). Within 50 miles also contains extreme variations in elevation (7,457 feet).

The area within 2 miles of Salt Lake City International Airport is covered by shrubs (76%) and cropland (15%), within 10 miles by shrubs (38%) and artificial surfaces (29%), and within 50 miles by shrubs (41%) and trees (19%).

This report illustrates the typical weather at Salt Lake City International Airport, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Temperature and Dew Point

Salt Lake City International Airport has a weather station that reported reliably enough during the analysis period that we have included it in our network. When available, historical temperature and dew point measurements are taken directly from this weather station. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required.

In the case of missing or erroneous measurements from this station, we fall back on records from nearby stations, adjusted according to typical seasonal and diurnal intra-station differences. For a given day of the year and hour of the day, the fallback station is selected to minimize the prediction error over the years for which there are measurements for both stations.

The stations on which we may fall back are Hill Air Force Base, Ogden Municipal Airport, Provo Municipal Airport, Logan-Cache Airport, Evanston-Uinta County Burns Field, and Carbon County Airport.

Other Data

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.

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

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.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.

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