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Winter Weather in Bayu China

Daily high temperatures are around 47°F, rarely falling below 34°F or exceeding 62°F. The lowest daily average high temperature is 42°F on January 17.

Daily low temperatures are around 30°F, rarely falling below 16°F or exceeding 42°F. The lowest daily average low temperature is 25°F on January 10.

For reference, on July 20, the hottest day of the year, temperatures in Bayu typically range from 71°F to 87°F, while on January 10, the coldest day of the year, they range from 25°F to 42°F.

Average High and Low Temperature in the Winter in Bayu

Average High and Low Temperature in the Winter in BayuDecJanFeb15°F15°F20°F20°F25°F25°F30°F30°F35°F35°F40°F40°F45°F45°F50°F50°F55°F55°F60°F60°F65°F65°F70°F70°F75°F75°FFallSpringJan 1242°FJan 1242°F25°F25°FDec 149°FDec 149°F32°F32°FFeb 2852°FFeb 2852°F35°F35°FFeb 144°FFeb 144°F28°F28°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 winter temperatures. 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 the Winter in Bayu

Average Hourly Temperature in the Winter in BayuDecJanFeb12 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 AMFallSpringfreezingvery coldcoldcoldcoolcool
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.

Marble Hill, United States (7,372 miles away) is the far-away foreign place with temperatures most similar to Bayu (view comparison).

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The winter in Bayu experiences very rapidly increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 31% to 50%. The lowest chance of overcast or mostly cloudy conditions is 29% on December 15.

The clearest day of the winter is December 15, with clear, mostly clear, or partly cloudy conditions 71% of the time.

For reference, on March 25, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 53%, while on December 15, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 71%.

Cloud Cover Categories in the Winter in Bayu

Cloud Cover Categories in the Winter in BayuDecJanFeb0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%FallSpringMar 2547%Mar 2547%Dec 169%Dec 169%Feb 2850%Feb 2850%Jan 169%Jan 169%Feb 160%Feb 160%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 Bayu, the chance of a wet day over the course of the winter is gradually increasing, starting the season at 3% and ending it at 7%.

For reference, the year's highest daily chance of a wet day is 35% on July 12, and its lowest chance is 0% on January 5.

Probability of Precipitation in the Winter in Bayu

Probability of Precipitation in the Winter in BayuDecJanFeb0%0%2%2%4%4%6%6%8%8%10%10%12%12%14%14%FallSpringJan 10%Jan 10%Dec 13%Dec 13%Feb 287%Feb 287%Feb 12%Feb 12%rainmixedsnow
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 season and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during the winter in Bayu is essentially constant, remaining about 0.2 inches throughout, and rarely exceeding 0.7 inches.

The lowest average 31-day accumulation is 0.0 inches on January 12.

Average Monthly Rainfall in the Winter in Bayu

Average Monthly Rainfall in the Winter in BayuDecJanFeb0.0 in0.0 in0.5 in0.5 in1.0 in1.0 in1.5 in1.5 inFallSpringJan 120.0 inJan 120.0 inDec 10.2 inDec 10.2 inFeb 280.3 inFeb 280.3 inFeb 10.1 inFeb 10.1 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 the winter in Bayu, the length of the day is rapidly increasing. From the start to the end of the season, the length of the day increases by 1 hour, 23 minutes, implying an average daily increase of 56 seconds, and weekly increase of 6 minutes, 31 seconds.

The shortest day of the winter is December 21, with 9 hours, 52 minutes of daylight and the longest day is February 28, with 11 hours, 25 minutes of daylight.

Hours of Daylight and Twilight in the Winter in Bayu

Hours of Daylight and Twilight in the Winter in BayuDecJanFeb0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrFallSpringDec 219 hr, 52 minDec 219 hr, 52 minnightnightdaydayFeb 2811 hr, 25 minFeb 2811 hr, 25 minFeb 110 hr, 32 minFeb 110 hr, 32 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 winter in Bayu is 7:57 AM on January 7 and the earliest sunrise is 37 minutes earlier at 7:21 AM on February 28.

The earliest sunset is 5:40 PM on December 4 and the latest sunset is 1 hour, 5 minutes later at 6:46 PM on February 28.

Daylight saving time is not observed in Bayu during 2024.

For reference, on June 20, the longest day of the year, the Sun rises at 5:38 AM and sets 14 hours, 27 minutes later, at 8:06 PM, while on December 21, the shortest day of the year, it rises at 7:53 AM and sets 9 hours, 52 minutes later, at 5:44 PM.

Sunrise & Sunset with Twilight in the Winter in Bayu

Sunrise & Sunset with Twilight in the Winter in BayuDecJanFeb2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMFallSpring7:21 AM7:21 AMFeb 286:46 PMFeb 286:46 PM7:41 AM7:41 AMDec 45:40 PMDec 45:40 PM7:57 AM7:57 AMJan 75:56 PMJan 75:56 PM7:48 AM7:48 AMFeb 16:20 PMFeb 16:20 PMSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day in the winter. 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 the Winter in Bayu

Solar Elevation and Azimuth in the Winter in BayuDecJanFeb12 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 AMFallSpring0010202030305000101020303040
northeastsouthwest
Solar elevation and azimuth in the the winter of 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 the winter of 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 the Winter in Bayu

Moon Rise, Set & Phases in the Winter in BayuDecJanFeb12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMFallSpringNov 18:48 PMNov 18:48 PMNov 165:29 AMNov 165:29 AMDec 12:22 PMDec 12:22 PMDec 155:02 PMDec 155:02 PMDec 316:28 AMDec 316:28 AMJan 146:28 AMJan 146:28 AMJan 298:37 PMJan 298:37 PMFeb 129:54 PMFeb 129:54 PMFeb 288:45 AMFeb 288:45 AMMar 142:55 PMMar 142:55 PMMar 296:58 PMMar 296:58 PM5:37 PM5:37 PM5:05 PM5:05 PM7:44 AM7:44 AM7:39 AM7:39 AM5:22 PM5:22 PM5:19 PM5:19 PM8:51 AM8:51 AM8:24 AM8:24 AM5:59 PM5:59 PM5:10 PM5:10 PM8:24 AM8:24 AM7:50 AM7:50 AM5:58 PM5:58 PM6:14 PM6:14 PM8:06 AM8:06 AM7:30 AM7:30 AM7:09 PM7:09 PM7:02 PM7:02 PM7:23 AM7:23 AM7:06 PM7:06 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.

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 Bayu is essentially constant during the winter, remaining around 0% throughout.

For reference, on July 29, the muggiest day of the year, there are muggy conditions 71% of the time, while on October 26, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in the Winter in Bayu

Humidity Comfort Levels in the Winter in BayuDecJanFeb0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%FallSpringDec 10%Dec 10%Feb 280%Feb 280%Jan 10%Jan 10%Feb 10%Feb 10%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 Bayu is increasing during the winter, increasing from 5.1 miles per hour to 6.1 miles per hour over the course of the season.

For reference, on April 24, the windiest day of the year, the daily average wind speed is 7.0 miles per hour, while on December 26, the calmest day of the year, the daily average wind speed is 4.9 miles per hour.

The lowest daily average wind speed during the winter is 4.9 miles per hour on December 26.

Average Wind Speed in the Winter in Bayu

Average Wind Speed in the Winter in BayuDecJanFeb0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mphFallSpringDec 264.9 mphDec 264.9 mphDec 15.1 mphDec 15.1 mphFeb 286.1 mphFeb 286.1 mphFeb 15.2 mphFeb 15.2 mph
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The wind direction in Bayu during the winter is predominantly out of the north from December 1 to January 9 and the east from January 9 to February 28.

Wind Direction in the Winter in Bayu

Wind Direction in the Winter in BayuNESDecJanFeb0%100%20%80%40%60%60%40%80%20%100%0%FallSpringwestsoutheastnorth
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 Bayu typically lasts for 8.3 months (254 days), from around March 7 to around November 16, rarely starting before February 15 or after March 30, and rarely ending before October 27 or after December 6.

The winter in Bayu is more likely than not fully outside of the growing season, with the chance that a given day is in the growing season reaching a low of -0% on December 29.

Time Spent in Various Temperature Bands and the Growing Season in the Winter in Bayu

Time Spent in Various Temperature Bands and the Growing Season in the Winter in BayuDecJanFeb0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%FallSpringDec 117%Dec 117%Feb 2832%Feb 2832%Jan 10%Jan 10%Feb 12%Feb 12%freezingvery coldcoldcoolcomfortable
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 Bayu are very rapidly decreasing during the winter, decreasing by 4,131°F, from 4,147°F to 17°F, over the course of the season.

Growing Degree Days in the Winter in Bayu

Growing Degree Days in the Winter in BayuDecJanFeb0°F0°F500°F500°F1,000°F1,000°F1,500°F1,500°F2,000°F2,000°F2,500°F2,500°F3,000°F3,000°F3,500°F3,500°F4,000°F4,000°FFallSpringDec 14,147°FDec 14,147°FFeb 2817°FFeb 2817°F
The average growing degree days accumulated over the course of the winter, 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 Bayu is increasing during the winter, rising by 1.2 kWh, from 3.0 kWh to 4.2 kWh, over the course of the season.

The lowest average daily incident shortwave solar energy during the winter is 2.9 kWh on December 23.

Average Daily Incident Shortwave Solar Energy in the Winter in Bayu

Average Daily Incident Shortwave Solar Energy in the Winter in BayuDecJanFeb0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWhFallSpringDec 232.9 kWhDec 232.9 kWhDec 13.0 kWhDec 13.0 kWhFeb 284.2 kWhFeb 284.2 kWhFeb 13.4 kWhFeb 13.4 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.

For the purposes of this report, the geographical coordinates of Bayu are 34.337 deg latitude, 107.277 deg longitude, and 1,854 ft elevation.

The topography within 2 miles of Bayu contains significant variations in elevation, with a maximum elevation change of 646 feet and an average elevation above sea level of 1,972 feet. Within 10 miles contains significant variations in elevation (5,180 feet). Within 50 miles also contains extreme variations in elevation (10,892 feet).

The area within 2 miles of Bayu is covered by cropland (62%) and water (15%), within 10 miles by cropland (44%) and grassland (22%), and within 50 miles by trees (38%) and grassland (31%).

This report illustrates the typical weather in Bayu, 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 is only a single weather station, Xi'an Xianyang International Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of Bayu.

At a distance of 136 kilometers from Bayu, closer than our threshold of 150 kilometers, this station is deemed sufficiently nearby to be relied upon as our primary source for temperature and dew point records.

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

Please note that the station records themselves may additionally have been back-filled using other nearby stations or the MERRA-2 reanalysis.

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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