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January Weather in Jackson Wyoming, United States

Daily high temperatures increase by 2°F, from 24°F to 26°F, rarely falling below 11°F or exceeding 36°F. The lowest daily average high temperature is 24°F on January 2.

Daily low temperatures are around 6°F, rarely falling below -13°F or exceeding 25°F. The lowest daily average low temperature is 5°F on January 27.

For reference, on July 26, the hottest day of the year, temperatures in Jackson typically range from 44°F to 79°F, while on January 27, the coldest day of the year, they range from 5°F to 25°F.

Average High and Low Temperature in January in Jackson

Average High and Low Temperature in January in JacksonJan1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930303131-15°F-15°F-10°F-10°F-5°F-5°F0°F0°F5°F5°F10°F10°F15°F15°F20°F20°F25°F25°F30°F30°F35°F35°F40°F40°F45°F45°FDecFebJan 224°FJan 224°F6°F6°FJan 3126°FJan 3126°F6°F6°FJan 1124°FJan 1124°F6°F6°FJan 2125°FJan 2125°F6°F6°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 January. 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 January in Jackson

Average Hourly Temperature in January in JacksonJan112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 AMDecFebfrigidfrigidfreezingfreezing
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.

Karayazı, Turkey (6,453 miles away) is the far-away foreign place with temperatures most similar to Jackson (view comparison).

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The month of January in Jackson experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 55% throughout the month. The lowest chance of overcast or mostly cloudy conditions is 54% on January 27.

The clearest day of the month is January 27, with clear, mostly clear, or partly cloudy conditions 46% of the time.

For reference, on March 17, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 58%, while on July 25, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 78%.

Cloud Cover Categories in January in Jackson

Cloud Cover Categories in January in JacksonJan11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%DecFebMar 1742%Mar 1742%Jan 144%Jan 144%Jan 3146%Jan 3146%Jan 1144%Jan 1144%Jan 2145%Jan 2145%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. In Jackson, the chance of a wet day over the course of January is decreasing, starting the month at 27% and ending it at 22%.

For reference, the year's highest daily chance of a wet day is 32% on May 23, and its lowest chance is 14% on July 3.

Over the course of January in Jackson, the chance of a day with only rain remains an essentially constant 2% throughout, the chance of a day with mixed snow and rain remains an essentially constant 5% throughout, and the chance of a day with only snow decreases from 20% to 15%.

Probability of Precipitation in January in Jackson

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 January in Jackson is essentially constant, remaining about 0.3 inches throughout, and rarely exceeding 0.8 inches or falling below -0.0 inches.

The lowest average 31-day accumulation is 0.3 inches on January 16.

Average Monthly Rainfall in January in Jackson

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.

Snowfall

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day snowfall during January in Jackson is decreasing, starting the month at 13.5 inches, when it rarely exceeds 25.8 inches or falls below 3.5 inches, and ending the month at 10.6 inches, when it rarely exceeds 22.6 inches or falls below 2.5 inches.

The highest average 31-day accumulation is 13.5 inches on January 3.

Average Monthly Snowfall in January in Jackson

The average snowfall (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 rainfall.

Over the course of January in Jackson, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 51 minutes, implying an average daily increase of 1 minute, 42 seconds, and weekly increase of 11 minutes, 54 seconds.

The shortest day of the month is January 1, with 9 hours, 1 minute of daylight and the longest day is January 31, with 9 hours, 52 minutes of daylight.

Hours of Daylight and Twilight in January in Jackson

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 latest sunrise of the month in Jackson is 7:56 AM on January 3 and the earliest sunrise is 15 minutes earlier at 7:40 AM on January 31.

The earliest sunset is 4:57 PM on January 1 and the latest sunset is 36 minutes later at 5:32 PM on January 31.

Daylight saving time is observed in Jackson during 2024, but it neither starts nor ends during January, so the entire month is in daylight saving time.

For reference, on June 20, the longest day of the year, the Sun rises at 5:42 AM and sets 15 hours, 25 minutes later, at 9:07 PM, while on December 21, the shortest day of the year, it rises at 7:53 AM and sets 8 hours, 57 minutes later, at 4:49 PM.

Sunrise & Sunset with Twilight in January in Jackson

The solar day over the course of January. 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 January in Jackson

Solar Elevation and Azimuth in January in JacksonJan112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 AMDecFeb001010202020300001010202030
northeastsouthwest
Solar elevation and azimuth over the course of January 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 January 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 January in Jackson

Moon Rise, Set & Phases in January in JacksonJan112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMDecFebDec 124:33 PMDec 124:33 PMDec 265:34 PMDec 265:34 PMJan 114:58 AMJan 114:58 AMJan 2510:55 AMJan 2510:55 AMFeb 94:00 PMFeb 94:00 PMFeb 245:31 AMFeb 245:31 AM7:48 AM7:48 AM4:17 PM4:17 PM4:19 PM4:19 PM8:58 AM8:58 AM8:35 AM8:35 AM5:18 PM5:18 PM4:13 PM4:13 PM8:14 AM8:14 AM7:46 AM7:46 AM5:33 PM5:33 PM5:21 PM5:21 PM7:32 AM7:32 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.
Jan 2024IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
74%-11:22 AMWNW10:44 PME4:35 AMS251,591 mi
2
65%-11:39 AMW11:45 PME5:14 AMS251,317 mi
3
50%-11:56 AMW-5:52 AMS250,221 mi
4
46%12:48 AME12:13 PMWSW-6:32 AMS248,303 mi
5
36%1:52 AMESE12:33 PMWSW-7:13 AMS245,637 mi
6
27%2:59 AMESE12:57 PMWSW-7:58 AMS242,368 mi
7
18%4:11 AMESE1:26 PMWSW-8:48 AMS238,715 mi
8
10%5:24 AMSE2:05 PMSW-9:44 AMS234,962 mi
9
4%6:36 AMSE2:56 PMSW-10:46 AMS231,438 mi
10
1%7:41 AMSE4:01 PMSW-11:51 AMS228,476 mi
11
0%8:35 AMSE5:18 PMSW-12:57 PMS226,358 mi
12
3%9:18 AMESE6:41 PMWSW-1:59 PMS225,257 mi
13
8%9:51 AMESE8:04 PMWSW-2:57 PMS225,205 mi
14
16%10:18 AMESE9:24 PMWSW-3:50 PMS226,110 mi
15
26%10:41 AME10:41 PMW-4:39 PMS227,784 mi
16
37%11:02 AME11:57 PMW-5:26 PMS229,998 mi
17
50%11:23 AMENE--6:13 PMS232,524 mi
18
60%-1:12 AMWNW11:46 AMENE7:01 PMS235,167 mi
19
71%-2:26 AMWNW12:13 PMENE7:51 PMS237,785 mi
20
80%-3:40 AMWNW12:44 PMNE8:43 PMS240,288 mi
21
88%-4:51 AMNW1:24 PMNE9:38 PMS242,629 mi
22
94%-5:57 AMNW2:12 PMNE10:33 PMS244,787 mi
23
98%-6:53 AMNW3:09 PMNE11:27 PMS246,750 mi
24
99%-7:38 AMNW4:13 PMNE--
25
100%-8:14 AMNW5:19 PMENE12:18 AMS248,495 mi
26
100%-8:43 AMWNW6:25 PMENE1:06 AMS249,981 mi
27
98%-9:06 AMWNW7:30 PMENE1:50 AMS251,144 mi
28
94%-9:26 AMWNW8:33 PME2:32 AMS251,896 mi
29
88%-9:44 AMW9:35 PME3:11 AMS252,137 mi
30
81%-10:00 AMW10:36 PME3:50 AMS251,770 mi
31
73%-10:17 AMW11:39 PMESE4:28 AMS250,711 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 in Jackson is essentially constant during January, remaining around 0% throughout.

Humidity Comfort Levels in January in Jackson

Humidity Comfort Levels in January in JacksonJan11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%DecFebJan 10%Jan 10%Jan 310%Jan 310%Jan 110%Jan 110%Jan 210%Jan 210%drydry
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 in Jackson is essentially constant during January, remaining around 4.9 miles per hour throughout.

For reference, on April 8, the windiest day of the year, the daily average wind speed is 5.4 miles per hour, while on August 3, the calmest day of the year, the daily average wind speed is 4.6 miles per hour.

Average Wind Speed in January in Jackson

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 in Jackson throughout January is predominantly from the west, with a peak proportion of 45% on January 19.

Wind Direction in January in Jackson

Wind Direction in January in JacksonJan11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%20%80%40%60%60%40%80%20%100%0%DecFebwestsoutheastnorth
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 in Jackson typically lasts for 2.3 months (69 days), from around June 20 to around August 28, rarely starting before May 28 or after July 11, and rarely ending before August 6 or after September 16.

The month of January in Jackson is reliably fully outside of the growing season.

Time Spent in Various Temperature Bands and the Growing Season in January in Jackson

Time Spent in Various Temperature Bands and the Growing Season in January in JacksonJan11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%DecFeb0%Jan 160%Jan 16frigidfreezingvery cold
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 in Jackson are essentially constant during January, remaining around 0°F throughout.

Growing Degree Days in January in Jackson

Growing Degree Days in January in JacksonJan11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310.0°F0.0°F0.1°F0.1°F0.2°F0.2°F0.3°F0.3°F0.4°F0.4°F0.5°F0.5°F0.6°F0.6°F0.7°F0.7°F0.8°F0.8°F0.9°F0.9°F1.0°F1.0°FDecFebJan 10°FJan 10°FJan 310°FJan 310°FJan 110°FJan 110°FJan 210°FJan 210°F
The average growing degree days accumulated over the course of January, 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 in Jackson is gradually increasing during January, rising by 0.8 kWh, from 1.9 kWh to 2.7 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in January in Jackson

Average Daily Incident Shortwave Solar Energy in January in JacksonJan11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310.0 kWh0.0 kWh0.5 kWh0.5 kWh1.0 kWh1.0 kWh1.5 kWh1.5 kWh2.0 kWh2.0 kWh2.5 kWh2.5 kWh3.0 kWh3.0 kWh3.5 kWh3.5 kWh4.0 kWh4.0 kWh4.5 kWh4.5 kWh5.0 kWh5.0 kWhDecFebJan 11.9 kWhJan 11.9 kWhJan 312.7 kWhJan 312.7 kWhJan 112.1 kWhJan 112.1 kWhJan 212.3 kWhJan 212.3 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 Jackson are 43.480 deg latitude, -110.762 deg longitude, and 6,237 ft elevation.

The topography within 2 miles of Jackson contains very significant variations in elevation, with a maximum elevation change of 1,867 feet and an average elevation above sea level of 6,619 feet. Within 10 miles contains very significant variations in elevation (4,974 feet). Within 50 miles also contains extreme variations in elevation (8,668 feet).

The area within 2 miles of Jackson is covered by shrubs (48%), trees (18%), grassland (12%), and cropland (12%), within 10 miles by shrubs (49%) and trees (31%), and within 50 miles by trees (43%) and shrubs (40%).

This report illustrates the typical weather in Jackson, 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

There are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Jackson.

For each station, the records are corrected for the elevation difference between that station and Jackson according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

The estimated value at Jackson is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Jackson and a given station.

The stations contributing to this reconstruction are:

To get a sense of how much these sources agree with each other, you can view a comparison of Jackson and the stations that contribute to our estimates of its temperature history and climate. Please note that each source's contribution is adjusted for elevation and the relative change present in the MERRA-2 data.

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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