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January Weather in Ulaan-Uul Mongolia

Daily high temperatures increase by 4°F, from 13°F to 16°F, rarely falling below 3°F or exceeding 26°F. The lowest daily average high temperature is 12°F on January 9.

Daily low temperatures are around -5°F, rarely falling below -15°F or exceeding 5°F. The lowest daily average low temperature is -6°F on January 18.

For reference, on July 27, the hottest day of the year, temperatures in Ulaan-Uul typically range from 62°F to 87°F, while on January 17, the coldest day of the year, they range from -6°F to 13°F.

Average High and Low Temperature in January in Ulaan-Uul

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 Ulaan-Uul

Average Hourly Temperature in January in Ulaan-Uul18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMDecFebfrigidfreezingfreezing
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.

Winnipeg, Canada (5,713 miles away) is the far-away foreign place with temperatures most similar to Ulaan-Uul (view comparison).

Compare Ulaan-Uul to another city:

Clouds

The month of January in Ulaan-Uul experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 30% throughout the month. The lowest chance of overcast or mostly cloudy conditions is 28% on January 27.

The clearest day of the month is January 27, with clear, mostly clear, or partly cloudy conditions 71% of the time.

For reference, on June 18, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 42%, while on January 27, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 71%.

Cloud Cover Categories in January in Ulaan-Uul

Cloud Cover Categories in January in Ulaan-Uul1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%DecFebJun 1858%Jun 1858%Jan 168%Jan 168%Jan 3171%Jan 3171%Jan 1170%Jan 1170%Jan 2171%Jan 2171%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.

Precipitation

Sun

Over the course of January in Ulaan-Uul, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 53 minutes, implying an average daily increase of 1 minute, 46 seconds, and weekly increase of 12 minutes, 21 seconds.

The shortest day of the month is January 1, with 8 hours, 55 minutes of daylight and the longest day is January 31, with 9 hours, 48 minutes of daylight.

Hours of Daylight and Twilight in January in Ulaan-Uul

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 Ulaan-Uul is 8:11 AM on January 2 and the earliest sunrise is 16 minutes earlier at 7:54 AM on January 31.

The earliest sunset is 5:06 PM on January 1 and the latest sunset is 37 minutes later at 5:42 PM on January 31.

Daylight saving time is not observed in Ulaan-Uul during 2021.

For reference, on June 21, the longest day of the year, the Sun rises at 4:50 AM and sets 15 hours, 32 minutes later, at 8:22 PM, while on December 21, the shortest day of the year, it rises at 8:07 AM and sets 8 hours, 51 minutes later, at 4:58 PM.

Sunrise & Sunset with Twilight in January in Ulaan-Uul

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.

Moon

The figure below presents a compact representation of key lunar data for January 2021. 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 Ulaan-Uul

Moon Rise, Set & Phases in January in Ulaan-Uul18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMDecFebDec 1512:17 AMDec 1512:17 AMDec 3011:29 AMDec 3011:29 AMJan 131:01 PMJan 131:01 PMJan 293:17 AMJan 293:17 AMFeb 123:06 AMFeb 123:06 AMFeb 274:18 PMFeb 274:18 PM7:19 AM7:19 AM4:33 PM4:33 PM4:12 PM4:12 PM8:18 AM8:18 AM8:20 AM8:20 AM5:12 PM5:12 PM4:52 PM4:52 PM8:32 AM8:32 AM8:16 AM8:16 AM6:23 PM6:23 PM6:09 PM6:09 PM8:04 AM8:04 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.

Humidity

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 Ulaan-Uul is essentially constant during January, remaining around 0% throughout.

For reference, on August 3, 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 Ulaan-Uul

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.

Wind

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 Ulaan-Uul is essentially constant during January, remaining within 0.2 miles per hour of 9.4 miles per hour throughout.

For reference, on May 4, the windiest day of the year, the daily average wind speed is 13.2 miles per hour, while on January 23, the calmest day of the year, the daily average wind speed is 9.2 miles per hour.

The lowest daily average wind speed during January is 9.2 miles per hour on January 23.

Average Wind Speed in January in Ulaan-Uul

Average Wind Speed in January in Ulaan-Uul1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mph16 mph16 mphDecFebJan 239.2 mphJan 239.2 mphJan 19.7 mphJan 19.7 mphJan 119.5 mphJan 119.5 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 Ulaan-Uul throughout January is predominantly from the west, with a peak proportion of 61% on January 3.

Wind Direction in January in Ulaan-Uul

Wind Direction in January in Ulaan-Uul1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%20%80%40%60%60%40%80%20%100%0%DecFebwestnorthsoutheast
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).

Growing Season

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 Ulaan-Uul typically lasts for 4.6 months (141 days), from around May 8 to around September 26, rarely starting before April 24 or after May 23, and rarely ending before September 12 or after October 11.

The month of January in Ulaan-Uul is reliably fully outside of the growing season.

Time Spent in Various Temperature Bands and the Growing Season in January in Ulaan-Uul

Time Spent in Various Temperature Bands and the Growing Season in January in Ulaan-Uul1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%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 Ulaan-Uul are essentially constant during January, remaining around 0°F throughout.

Growing Degree Days in January in Ulaan-Uul

Growing Degree Days in January in Ulaan-Uul1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310.0°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.

Solar Energy

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 Ulaan-Uul is gradually increasing during January, rising by 0.8 kWh, from 2.0 kWh to 2.8 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in January in Ulaan-Uul

Average Daily Incident Shortwave Solar Energy in January in Ulaan-Uul1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310.0 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 12.0 kWhJan 12.0 kWhJan 312.8 kWhJan 312.8 kWhJan 112.1 kWhJan 112.1 kWhJan 212.4 kWhJan 212.4 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.

Topography

For the purposes of this report, the geographical coordinates of Ulaan-Uul are 44.333 deg latitude, 111.233 deg longitude, and 3,278 ft elevation.

The topography within 2 miles of Ulaan-Uul contains only modest variations in elevation, with a maximum elevation change of 217 feet and an average elevation above sea level of 3,335 feet. Within 10 miles contains only modest variations in elevation (837 feet). Within 50 miles also contains very significant variations in elevation (1,850 feet).

The area within 2 miles of Ulaan-Uul is covered by bare soil (100%), within 10 miles by bare soil (98%), and within 50 miles by bare soil (76%) and grassland (23%).

Data Sources

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

Ulaan-Uul is further than 200 kilometers from the nearest reliable weather station, so the weather-related data on this page were taken entirely from NASA's MERRA-2 satellite-era reanalysis . 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.

The temperature and dew point estimates are corrected for the difference between the reference elevation of the MERRA-2 grid cell and the elevation of Ulaan-Uul, according to the International Standard Atmosphere .

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.

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 © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.

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.