December Weather in Rūdbār AfghanistanDaily high temperatures decrease by 6°F, from 70°F to 63°F, rarely falling below 51°F or exceeding 79°F. Daily low temperatures decrease by 5°F, from 43°F to 38°F, rarely falling below 27°F or exceeding 52°F. For reference, on July 3, the hottest day of the year, temperatures in Rūdbār typically range from 82°F to 110°F, while on January 11, the coldest day of the year, they range from 38°F to 63°F. The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on December. 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. Goodyear, United States (8,040 miles away); Timimoun, Algeria (3,698 miles); and Hassi Messaoud, Algeria (3,317 miles) are the far-away foreign places with temperatures most similar to Rūdbār (view comparison). CloudsThe month of December in Rūdbār experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 23% throughout the month. The highest chance of overcast or mostly cloudy conditions is 24% on December 30. The clearest day of the month is December 1, with clear, mostly clear, or partly cloudy conditions 78% of the time. For reference, on March 21, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 31%, while on September 20, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 99%. PrecipitationA wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Rūdbār, the chance of a wet day over the course of December is gradually increasing, starting the month at 2% and ending it at 5%. For reference, the year's highest daily chance of a wet day is 5% on January 18, and its lowest chance is 0% on September 11. 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 December in Rūdbār is essentially constant, remaining about 0.2 inches throughout, and rarely exceeding 0.8 inches or falling below -0.0 inches. SunOver the course of December in Rūdbār, the length of the day is essentially constant. The shortest day of the month is December 21, with 10 hours, 12 minutes of daylight and the longest day is December 1, with 10 hours, 21 minutes of daylight. The earliest sunrise of the month in Rūdbār is 6:58 AM on December 1 and the latest sunrise is 17 minutes later at 7:15 AM on December 31. The earliest sunset is 5:18 PM on December 3 and the latest sunset is 11 minutes later at 5:29 PM on December 31. Daylight saving time is not observed in Rūdbār during 2024. For reference, on June 20, the longest day of the year, the Sun rises at 5:18 AM and sets 14 hours, 5 minutes later, at 7:24 PM, while on December 21, the shortest day of the year, it rises at 7:11 AM and sets 10 hours, 12 minutes later, at 5:23 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 December 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 Rūdbār is essentially constant during December, remaining around 0% throughout. For reference, on July 27, the muggiest day of the year, there are muggy conditions 2% of the time, while on October 16, 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 Rūdbār is essentially constant during December, remaining within 0.2 miles per hour of 6.7 miles per hour throughout. For reference, on June 15, the windiest day of the year, the daily average wind speed is 11.1 miles per hour, while on December 9, the calmest day of the year, the daily average wind speed is 6.5 miles per hour. The lowest daily average wind speed during December is 6.5 miles per hour on December 9. The wind direction in Rūdbār during December is predominantly out of the west from December 1 to December 16 and the south from December 16 to December 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 Rūdbār typically lasts for 10.0 months (302 days), from around February 16 to around December 14, rarely starting before January 23 or after March 9, and rarely ending before November 21 or after January 6. The month of December in Rūdbār is very likely fully outside of the growing season, with the chance that a given day is in the growing season very rapidly decreasing from 75% to 18% over the course of the month. 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 Rūdbār are gradually increasing during December, increasing by 173°F, from 7,754°F to 7,927°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 Rūdbār is essentially constant during December, remaining within 0.1 kWh of 3.8 kWh throughout. The lowest average daily incident shortwave solar energy during December is 3.7 kWh on December 20. TopographyFor the purposes of this report, the geographical coordinates of Rūdbār are 30.150 deg latitude, 62.600 deg longitude, and 1,827 ft elevation. The topography within 2 miles of Rūdbār contains only modest variations in elevation, with a maximum elevation change of 344 feet and an average elevation above sea level of 1,879 feet. Within 10 miles contains only modest variations in elevation (607 feet). Within 50 miles contains significant variations in elevation (2,257 feet). The area within 2 miles of Rūdbār is covered by bare soil (69%) and cropland (13%), within 10 miles by bare soil (91%), and within 50 miles by bare soil (93%). Data SourcesThis report illustrates the typical weather in Rūdbār, 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, Zabol, in our network suitable to be used as a proxy for the historical temperature and dew point records of Rūdbār. At a distance of 146 kilometers from Rūdbār, 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 Rūdbār 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. |