January Weather in Perambalur IndiaDaily high temperatures increase by 3°F, from 84°F to 87°F, rarely falling below 81°F or exceeding 90°F. Daily low temperatures are around 70°F, rarely falling below 66°F or exceeding 74°F. The lowest daily average low temperature is 69°F on January 24. For reference, on May 7, the hottest day of the year, temperatures in Perambalur typically range from 81°F to 100°F, while on January 17, the coldest day of the year, they range from 69°F to 85°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. Santo Domingo Zanatepec, Mexico (10,478 miles away) and Chikwawa, Malawi (3,558 miles) are the far-away foreign places with temperatures most similar to Perambalur (view comparison). CloudsThe month of January in Perambalur experiences decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 51% to 42%. The clearest day of the month is January 31, with clear, mostly clear, or partly cloudy conditions 58% of the time. For reference, on June 21, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 94%, while on February 9, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 59%. PrecipitationA wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Perambalur, the chance of a wet day over the course of January is rapidly decreasing, starting the month at 9% and ending it at 3%. For reference, the year's highest daily chance of a wet day is 48% on October 26, and its lowest chance is 2% on February 1. 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 Perambalur is decreasing, starting the month at 1.1 inches, when it rarely exceeds 3.2 inches, and ending the month at 0.3 inches, when it rarely exceeds 0.8 inches. SunOver the course of January in Perambalur, the length of the day is essentially constant. The shortest day of the month is January 1, with 11 hours, 29 minutes of daylight and the longest day is January 31, with 11 hours, 38 minutes of daylight. The earliest sunrise of the month in Perambalur is 6:33 AM on January 1 and the latest sunrise is 5 minutes later at 6:38 AM on January 26. The earliest sunset is 6:02 PM on January 1 and the latest sunset is 15 minutes later at 6:17 PM on January 31. Daylight saving time is not observed in Perambalur during 2024. For reference, on June 20, the longest day of the year, the Sun rises at 5:52 AM and sets 12 hours, 47 minutes later, at 6:39 PM, while on December 21, the shortest day of the year, it rises at 6:28 AM and sets 11 hours, 28 minutes later, at 5:56 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 Perambalur is decreasing during January, falling from 81% to 71% over the course of the month. For reference, on October 5, the muggiest day of the year, there are muggy conditions 99% of the time, while on February 2, the least muggy day of the year, there are muggy conditions 71% 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 Perambalur is gradually decreasing during January, decreasing from 8.6 miles per hour to 7.9 miles per hour over the course of the month. For reference, on June 26, the windiest day of the year, the daily average wind speed is 12.3 miles per hour, while on October 11, the calmest day of the year, the daily average wind speed is 5.9 miles per hour. The hourly average wind direction in Perambalur throughout January is predominantly from the east, with a peak proportion of 71% on January 30. Water TemperaturePerambalur is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water. The average surface water temperature in Perambalur is essentially constant during January, remaining around 80°F throughout. The lowest average surface water temperature during January is 80°F on January 12. 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 Perambalur 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 Perambalur are rapidly increasing during January, increasing by 805°F, from 27°F to 832°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 Perambalur is gradually increasing during January, rising by 0.8 kWh, from 5.4 kWh to 6.3 kWh, over the course of the month. TopographyFor the purposes of this report, the geographical coordinates of Perambalur are 11.233 deg latitude, 78.883 deg longitude, and 407 ft elevation. The topography within 2 miles of Perambalur contains only modest variations in elevation, with a maximum elevation change of 394 feet and an average elevation above sea level of 405 feet. Within 10 miles contains only modest variations in elevation (1,795 feet). Within 50 miles contains very significant variations in elevation (4,856 feet). The area within 2 miles of Perambalur is covered by cropland (73%) and trees (13%), within 10 miles by cropland (76%) and trees (12%), and within 50 miles by cropland (82%). Data SourcesThis report illustrates the typical weather in Perambalur, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016. Temperature and Dew PointThere is only a single weather station, Tiruchirappalli International Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of Perambalur. At a distance of 55 kilometers from Perambalur, 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 Perambalur 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 DataAll 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. 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. |