January Weather in Jiuxi ChinaDaily high temperatures are around 51°F, rarely falling below 39°F or exceeding 63°F. The lowest daily average high temperature is 50°F on January 19. Daily low temperatures are around 34°F, rarely falling below 27°F or exceeding 42°F. The lowest daily average low temperature is 33°F on January 19. For reference, on July 29, the hottest day of the year, temperatures in Jiuxi typically range from 77°F to 91°F, while on January 19, the coldest day of the year, they range from 33°F to 50°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. Memphis, United States (7,789 miles away) is the far-away foreign place with temperatures most similar to Jiuxi (view comparison). CloudsThe month of January in Jiuxi experiences gradually increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 30% to 34%. The clearest day of the month is January 1, with clear, mostly clear, or partly cloudy conditions 70% of the time. For reference, on July 5, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 71%, while on December 16, 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 Jiuxi, the chance of a wet day over the course of January is gradually increasing, starting the month at 14% and ending it at 16%. For reference, the year's highest daily chance of a wet day is 42% on June 21, and its lowest chance is 11% on December 17. Over the course of January in Jiuxi, the chance of a day with only rain remains an essentially constant 12% throughout, the chance of a day with mixed snow and rain remains an essentially constant 3% throughout, 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 Jiuxi is gradually increasing, starting the month at 0.9 inches, when it rarely exceeds 2.0 inches or falls below 0.1 inches, and ending the month at 1.3 inches, when it rarely exceeds 2.5 inches or falls below 0.2 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 Jiuxi is gradually increasing, starting the month at 1.1 inches, when it rarely exceeds 3.8 inches, and ending the month at 1.7 inches, when it rarely exceeds 4.8 inches. The highest average 31-day accumulation is 1.7 inches on January 30. SunOver the course of January in Jiuxi, the length of the day is gradually increasing. From the start to the end of the month, the length of the day increases by 28 minutes, implying an average daily increase of 56 seconds, and weekly increase of 6 minutes, 34 seconds. The shortest day of the month is January 1, with 10 hours, 19 minutes of daylight and the longest day is January 31, with 10 hours, 47 minutes of daylight. The latest sunrise of the month in Jiuxi is 7:30 AM on January 11 and the earliest sunrise is 5 minutes earlier at 7:24 AM on January 31. The earliest sunset is 5:47 PM on January 1 and the latest sunset is 24 minutes later at 6:11 PM on January 31. Daylight saving time is not observed in Jiuxi during 2024. For reference, on June 20, the longest day of the year, the Sun rises at 5:36 AM and sets 14 hours, 1 minute later, at 7:36 PM, while on December 21, the shortest day of the year, it rises at 7:24 AM and sets 10 hours, 17 minutes later, at 5:41 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 Jiuxi is essentially constant during January, remaining around 0% throughout. For reference, on July 22, the muggiest day of the year, there are muggy conditions 100% of the time, while on December 10, 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 Jiuxi is essentially constant during January, remaining within 0.2 miles per hour of 6.5 miles per hour throughout. For reference, on March 8, the windiest day of the year, the daily average wind speed is 7.4 miles per hour, while on June 10, the calmest day of the year, the daily average wind speed is 5.9 miles per hour. The hourly average wind direction in Jiuxi throughout January is predominantly from the north, with a peak proportion of 52% on January 18. 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 Jiuxi typically lasts for 9.5 months (287 days), from around February 23 to around December 6, rarely starting before February 1 or after March 14, and rarely ending before November 17 or after December 25. The month of January in Jiuxi is very likely fully outside of the growing season, with the chance that a given day is in the growing season reaching a low of 0% on January 11. 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 Jiuxi are essentially constant during January, remaining within 13°F of 14°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 Jiuxi is essentially constant during January, remaining within 0.2 kWh of 3.0 kWh throughout. TopographyFor the purposes of this report, the geographical coordinates of Jiuxi are 29.181 deg latitude, 111.272 deg longitude, and 190 ft elevation. The topography within 2 miles of Jiuxi contains significant variations in elevation, with a maximum elevation change of 715 feet and an average elevation above sea level of 251 feet. Within 10 miles contains significant variations in elevation (1,896 feet). Within 50 miles contains very significant variations in elevation (4,692 feet). The area within 2 miles of Jiuxi is covered by cropland (58%) and trees (38%), within 10 miles by trees (51%) and cropland (39%), and within 50 miles by trees (55%) and cropland (26%). Data SourcesThis report illustrates the typical weather in Jiuxi, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016. Jiuxi 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 Jiuxi, 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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