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January Weather in Arches National Park Utah, United States

Daily high temperatures increase by 5°F, from 38°F to 43°F, rarely falling below 27°F or exceeding 54°F. The lowest daily average high temperature is 38°F on January 3.

Daily low temperatures increase by 4°F, from 20°F to 24°F, rarely falling below 8°F or exceeding 34°F. The lowest daily average low temperature is 20°F on January 4.

For reference, on July 7, the hottest day of the year, temperatures in Arches National Park typically range from 68°F to 95°F, while on January 4, the coldest day of the year, they range from 20°F to 38°F.

Average High and Low Temperature in January in Arches National Park

Average High and Low Temperature in January in Arches National ParkJan11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031315°F5°F10°F10°F15°F15°F20°F20°F25°F25°F30°F30°F35°F35°F40°F40°F45°F45°F50°F50°F55°F55°F60°F60°F65°F65°FDecFebJan 338°FJan 338°F20°F20°FJan 3143°FJan 3143°F24°F24°FJan 1139°FJan 1139°F20°F20°FJan 2141°FJan 2141°F22°F22°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 Arches National Park

Average Hourly Temperature in January in Arches National ParkJan112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 AMDecFebfreezingfreezingvery 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 average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.
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The month of January in Arches National Park experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 41% throughout the month.

The clearest day of the month is January 7, with clear, mostly clear, or partly cloudy conditions 61% of the time.

For reference, on March 2, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 45%, while on September 18, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 80%.

Cloud Cover Categories in January in Arches National Park

Cloud Cover Categories in January in Arches National ParkJan11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%DecFebJan 160%Jan 160%Jan 3158%Jan 3158%Jan 1160%Jan 1160%Jan 2159%Jan 2159%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 Arches National Park, the chance of a wet day over the course of January is essentially constant, remaining around 9% throughout.

For reference, the year's highest daily chance of a wet day is 18% on July 31, and its lowest chance is 5% on June 13.

Over the course of January in Arches National Park, the chance of a day with only rain remains an essentially constant 5% throughout, the chance of a day with mixed snow and rain remains an essentially constant 2% throughout, and the chance of a day with only snow remains an essentially constant 2% throughout.

Probability of Precipitation in January in Arches National Park

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 Arches National Park is essentially constant, remaining about 0.4 inches throughout, and rarely exceeding 0.8 inches.

Average Monthly Rainfall in January in Arches National Park

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 Arches National Park is gradually decreasing, starting the month at 1.6 inches, when it rarely exceeds 5.3 inches or falls below -0.0 inches, and ending the month at 0.7 inches, when it rarely exceeds 2.5 inches or falls below -0.0 inches.

Average Monthly Snowfall in January in Arches National Park

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 Arches National Park, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 42 minutes, implying an average daily increase of 1 minute, 25 seconds, and weekly increase of 9 minutes, 52 seconds.

The shortest day of the month is January 1, with 9 hours, 31 minutes of daylight and the longest day is January 31, with 10 hours, 13 minutes of daylight.

Hours of Daylight and Twilight in January in Arches National Park

Hours of Daylight and Twilight in January in Arches National ParkJan11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrDecFebnightnightdaydayJan 19 hr, 31 minJan 19 hr, 31 minJan 3110 hr, 13 minJan 3110 hr, 13 minJan 169 hr, 47 minJan 169 hr, 47 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 latest sunrise of the month in Arches National Park is 7:36 AM on January 5 and the earliest sunrise is 11 minutes earlier at 7:25 AM on January 31.

The earliest sunset is 5:07 PM on January 1 and the latest sunset is 31 minutes later at 5:38 PM on January 31.

Daylight saving time is observed in Arches National Park during 2024, but it neither starts nor ends during January, so the entire month is in standard time.

For reference, on June 20, the longest day of the year, the Sun rises at 5:53 AM and sets 14 hours, 53 minutes later, at 8:46 PM, while on December 21, the shortest day of the year, it rises at 7:33 AM and sets 9 hours, 27 minutes later, at 5:00 PM.

Sunrise & Sunset with Twilight in January in Arches National Park

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 Arches National Park

Solar Elevation and Azimuth in January in Arches National ParkJan112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 AMDecFeb00101020202030000101020203030
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 Arches National Park

Moon Rise, Set & Phases in January in Arches National ParkJan112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 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 AM7:23 AM7:23 AM4:32 PM4:32 PM4:36 PM4:36 PM8:32 AM8:32 AM8:11 AM8:11 AM5:31 PM5:31 PM4:26 PM4:26 PM7:53 AM7:53 AM7:28 AM7:28 AM5:40 PM5:40 PM5:25 PM5:25 PM7:19 AM7:19 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%-11:12 AMW10:42 PME4:30 AMS251,590 mi
2
65%-11:32 AMW11:41 PME5:10 AMS251,319 mi
3
50%-11:53 AMW-5:48 AMS250,225 mi
4
46%12:39 AME12:14 PMW-6:27 AMS248,310 mi
5
36%1:40 AMESE12:37 PMWSW-7:09 AMS245,646 mi
6
27%2:44 AMESE1:04 PMWSW-7:54 AMS242,379 mi
7
18%3:51 AMESE1:37 PMWSW-8:44 AMS238,726 mi
8
10%5:01 AMESE2:19 PMSW-9:40 AMS234,973 mi
9
4%6:10 AMSE3:12 PMSW-10:41 AMS231,448 mi
10
1%7:15 AMSE4:17 PMSW-11:46 AMS228,485 mi
11
0%8:11 AMSE5:31 PMWSW-12:51 PMS226,364 mi
12
3%8:57 AMESE6:50 PMWSW-1:54 PMS225,259 mi
13
8%9:35 AMESE8:08 PMWSW-2:51 PMS225,204 mi
14
16%10:06 AMESE9:24 PMW-3:44 PMS226,105 mi
15
26%10:33 AME10:37 PMW-4:34 PMS227,777 mi
16
37%10:59 AME11:49 PMW-5:21 PMS229,990 mi
17
50%11:24 AMENE--6:08 PMS232,515 mi
18
60%-12:59 AMWNW11:51 AMENE6:56 PMS235,158 mi
19
71%-2:09 AMWNW12:21 PMENE7:46 PMS237,776 mi
20
80%-3:19 AMWNW12:56 PMENE8:38 PMS240,279 mi
21
88%-4:27 AMNW1:39 PMNE9:33 PMS242,621 mi
22
94%-5:31 AMNW2:28 PMNE10:28 PMS244,780 mi
23
98%-6:27 AMNW3:25 PMNE11:22 PMS246,744 mi
24
99%-7:14 AMNW4:26 PMNE--
25
100%-7:53 AMWNW5:30 PMENE12:13 AMS248,490 mi
26
100%-8:25 AMWNW6:33 PMENE1:01 AMS249,977 mi
27
98%-8:52 AMWNW7:34 PMENE1:46 AMS251,141 mi
28
94%-9:15 AMWNW8:33 PME2:27 AMS251,894 mi
29
88%-9:36 AMW9:31 PME3:07 AMS252,137 mi
30
81%-9:56 AMW10:29 PME3:45 AMS251,772 mi
31
73%-10:16 AMW11:28 PMESE4:24 AMS250,715 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 Arches National Park is essentially constant during January, remaining around 0% throughout.

For reference, on July 30, the muggiest day of the year, there are muggy conditions 0% of the time, while on January 1, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in January in Arches National Park

Humidity Comfort Levels in January in Arches National ParkJan11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%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 Arches National Park is essentially constant during January, remaining within 0.2 miles per hour of 6.3 miles per hour throughout.

For reference, on April 10, the windiest day of the year, the daily average wind speed is 8.8 miles per hour, while on January 7, the calmest day of the year, the daily average wind speed is 6.1 miles per hour.

The lowest daily average wind speed during January is 6.1 miles per hour on January 10.

Average Wind Speed in January in Arches National Park

Average Wind Speed in January in Arches National ParkJan11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mphDecFebJan 106.1 mphJan 106.1 mphJan 16.2 mphJan 16.2 mphJan 316.5 mphJan 316.5 mphJan 216.3 mphJan 216.3 mph
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 Arches National Park throughout January is predominantly from the south, with a peak proportion of 45% on January 11.

Wind Direction in January in Arches National Park

Wind Direction in January in Arches National ParkJan11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%20%80%40%60%60%40%80%20%100%0%DecFebwestsouthnortheast
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 Arches National Park typically lasts for 6.5 months (201 days), from around April 11 to around October 28, rarely starting before March 19 or after May 1, and rarely ending before October 10 or after November 14.

The month of January in Arches National Park is reliably fully outside of the growing season.

Time Spent in Various Temperature Bands and the Growing Season in January in Arches National Park

Time Spent in Various Temperature Bands and the Growing Season in January in Arches National ParkJan11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%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 coldcoldcool
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 Arches National Park are essentially constant during January, remaining within 1°F of 1°F throughout.

Growing Degree Days in January in Arches National Park

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 Arches National Park is gradually increasing during January, rising by 0.7 kWh, from 2.6 kWh to 3.3 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in January in Arches National Park

Average Daily Incident Shortwave Solar Energy in January in Arches National ParkJan11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310.0 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 kWh5.5 kWh5.5 kWhDecFebJan 12.6 kWhJan 12.6 kWhJan 313.3 kWhJan 313.3 kWhJan 112.8 kWhJan 112.8 kWhJan 213.0 kWhJan 213.0 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 Arches National Park are 38.723 deg latitude, -109.586 deg longitude, and 4,022 ft elevation.

The topography within 2 miles of Arches National Park contains significant variations in elevation, with a maximum elevation change of 771 feet and an average elevation above sea level of 4,808 feet. Within 10 miles contains significant variations in elevation (2,149 feet). Within 50 miles contains large variations in elevation (8,921 feet).

The area within 2 miles of Arches National Park is covered by shrubs (100%), within 10 miles by shrubs (99%), and within 50 miles by shrubs (82%) and trees (10%).

This report illustrates the typical weather in Arches National Park, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

The details of the data sources used for this report can be found on the Moab page.

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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