January Weather in Zhengwan ChinaDaily high temperatures are around 49°F, rarely falling below 38°F or exceeding 62°F. The lowest daily average high temperature is 48°F on January 19. Daily low temperatures are around 32°F, rarely falling below 23°F or exceeding 42°F. The lowest daily average low temperature is 31°F on January 19. For reference, on July 30, the hottest day of the year, temperatures in Zhengwan typically range from 75°F to 87°F, while on January 19, the coldest day of the year, they range from 31°F to 48°F. 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. Nashville, United States (7,614 miles away) and Gloucester Point, United States (7,724 miles) are the far-away foreign places with temperatures most similar to Zhengwan (view comparison). CloudsThe month of January in Zhengwan experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 34% to 39%. The clearest day of the month is January 1, with clear, mostly clear, or partly cloudy conditions 67% of the time. For reference, on July 3, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 78%, while on October 22, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 72%. PrecipitationA wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Zhengwan, the chance of a wet day over the course of January is rapidly increasing, starting the month at 20% and ending it at 27%. For reference, the year's highest daily chance of a wet day is 55% on June 21, and its lowest chance is 16% on December 17. Over the course of January in Zhengwan, the chance of a day with only rain increases from 17% to 21%, the chance of a day with mixed snow and rain increases from 2% to 4%, and the chance of a day with only snow remains an essentially constant 1% throughout. RainfallTo 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 Zhengwan is increasing, starting the month at 1.6 inches, when it rarely exceeds 3.2 inches or falls below 0.3 inches, and ending the month at 2.5 inches, when it rarely exceeds 4.6 inches or falls below 0.9 inches. SnowfallAs 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 Zhengwan is gradually increasing, starting the month at 1.5 inches, when it rarely exceeds 5.4 inches, and ending the month at 2.2 inches, when it rarely exceeds 6.9 inches. The highest average 31-day accumulation is 2.3 inches on January 28. SunOver the course of January in Zhengwan, the length of the day is gradually increasing. From the start to the end of the month, the length of the day increases by 29 minutes, implying an average daily increase of 57 seconds, and weekly increase of 6 minutes, 42 seconds. The shortest day of the month is January 1, with 10 hours, 17 minutes of daylight and the longest day is January 31, with 10 hours, 45 minutes of daylight. The latest sunrise of the month in Zhengwan is 7:02 AM on January 11 and the earliest sunrise is 5 minutes earlier at 6:57 AM on January 31. The earliest sunset is 5:18 PM on January 1 and the latest sunset is 25 minutes later at 5:42 PM on January 31. Daylight saving time is not observed in Zhengwan during 2024. For reference, on June 20, the longest day of the year, the Sun rises at 5:06 AM and sets 14 hours, 3 minutes later, at 7:09 PM, while on December 21, the shortest day of the year, it rises at 6:57 AM and sets 10 hours, 15 minutes later, at 5:11 PM. 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. MoonThe 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.
HumidityWe 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 Zhengwan is essentially constant during January, remaining around 0% throughout. For reference, on July 23, the muggiest day of the year, there are muggy conditions 100% of the time, while on December 11, the least muggy day of the year, there are muggy conditions 0% of the time. WindThis 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 Zhengwan is essentially constant during January, remaining within 0.2 miles per hour of 6.6 miles per hour throughout. For reference, on March 9, the windiest day of the year, the daily average wind speed is 7.5 miles per hour, while on August 4, the calmest day of the year, the daily average wind speed is 6.0 miles per hour. The hourly average wind direction in Zhengwan throughout January is predominantly from the east, with a peak proportion of 48% on January 31. Growing SeasonDefinitions 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 Zhengwan typically lasts for 8.4 months (256 days), from around March 11 to around November 22, rarely starting before February 22 or after March 29, and rarely ending before November 4 or after December 10. The month of January in Zhengwan is reliably fully outside of 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 Zhengwan are essentially constant during January, remaining within 10°F of 10°F throughout. Solar EnergyThis 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 Zhengwan is essentially constant during January, remaining within 0.2 kWh of 3.3 kWh throughout. The lowest average daily incident shortwave solar energy during January is 3.1 kWh on January 7. TopographyFor the purposes of this report, the geographical coordinates of Zhengwan are 29.639 deg latitude, 118.368 deg longitude, and 610 ft elevation. The topography within 2 miles of Zhengwan contains very significant variations in elevation, with a maximum elevation change of 1,476 feet and an average elevation above sea level of 958 feet. Within 10 miles contains very significant variations in elevation (4,124 feet). Within 50 miles also contains extreme variations in elevation (5,988 feet). The area within 2 miles of Zhengwan is covered by trees (88%), within 10 miles by trees (76%) and cropland (13%), and within 50 miles by trees (81%). Data SourcesThis report illustrates the typical weather in Zhengwan, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016. Zhengwan 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 Zhengwan, 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 © OpenStreetMap contributors. DisclaimerThe 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. 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