January Weather in Veun Sai CambodiaDaily high temperatures increase by 3°F, from 90°F to 93°F, rarely falling below 81°F or exceeding 99°F. Daily low temperatures are around 68°F, rarely falling below 61°F or exceeding 74°F. The lowest daily average low temperature is 67°F on January 3. For reference, on March 27, the hottest day of the year, temperatures in Veun Sai typically range from 77°F to 100°F, while on January 2, the coldest day of the year, they range from 67°F to 90°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. Valle San Francisco, Nicaragua (10,410 miles away); Lucas, Brazil (11,287 miles); and Buba, Guinea-Bissau (8,086 miles) are the far-away foreign places with temperatures most similar to Veun Sai (view comparison). CloudsThe month of January in Veun Sai experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 47% throughout the month. The clearest day of the month is January 25, with clear, mostly clear, or partly cloudy conditions 53% of the time. For reference, on August 20, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 93%, while on February 10, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 56%. PrecipitationA wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Veun Sai, the chance of a wet day over the course of January is gradually decreasing, starting the month at 5% and ending it at 3%. For reference, the year's highest daily chance of a wet day is 45% on September 18, and its lowest chance is 2% on February 19. 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 Veun Sai is essentially constant, remaining about 0.3 inches throughout, and rarely exceeding 1.4 inches or falling below -0.0 inches. SunOver the course of January in Veun Sai, the length of the day is essentially constant. The shortest day of the month is January 1, with 11 hours, 19 minutes of daylight and the longest day is January 31, with 11 hours, 31 minutes of daylight. The earliest sunrise of the month in Veun Sai is 6:16 AM on January 1 and the latest sunrise is 5 minutes later at 6:21 AM on January 24. The earliest sunset is 5:35 PM on January 1 and the latest sunset is 16 minutes later at 5:51 PM on January 31. Daylight saving time is not observed in Veun Sai during 2024. For reference, on June 20, the longest day of the year, the Sun rises at 5:25 AM and sets 12 hours, 57 minutes later, at 6:23 PM, while on December 21, the shortest day of the year, it rises at 6:11 AM and sets 11 hours, 18 minutes later, at 5:30 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 Veun Sai is gradually decreasing during January, falling from 26% to 21% over the course of the month. The lowest chance of a muggy day during January is 20% on January 26. For reference, on August 9, the muggiest day of the year, there are muggy conditions 100% of the time, while on January 25, the least muggy day of the year, there are muggy conditions 20% 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 Veun Sai is essentially constant during January, remaining around 2.2 miles per hour throughout. For reference, on August 2, the windiest day of the year, the daily average wind speed is 2.4 miles per hour, while on October 4, the calmest day of the year, the daily average wind speed is 1.7 miles per hour. The hourly average wind direction in Veun Sai throughout January is predominantly from the east, with a peak proportion of 78% on January 16. 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). Temperatures in Veun Sai are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year. 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 Veun Sai are rapidly increasing during January, increasing by 819°F, from 28°F to 847°F, over the course of the month. 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 Veun Sai is essentially constant during January, remaining within 0.2 kWh of 5.7 kWh throughout. TopographyFor the purposes of this report, the geographical coordinates of Veun Sai are 13.976 deg latitude, 106.811 deg longitude, and 305 ft elevation. The topography within 2 miles of Veun Sai is essentially flat, with a maximum elevation change of 95 feet and an average elevation above sea level of 319 feet. Within 10 miles is essentially flat (1,040 feet). Within 50 miles contains very significant variations in elevation (4,698 feet). The area within 2 miles of Veun Sai is covered by trees (54%) and cropland (38%), within 10 miles by trees (82%) and cropland (12%), and within 50 miles by trees (91%). Data SourcesThis report illustrates the typical weather in Veun Sai, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016. Veun Sai 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 Veun Sai, 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. 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. Please review our full terms contained on our Terms of Service page. |