Winter Weather at Mwanza Airport TanzaniaDaily high temperatures are around 82°F, rarely falling below 78°F or exceeding 85°F. Daily low temperatures are around 64°F, rarely falling below 60°F or exceeding 68°F. The lowest daily average low temperature is 63°F on July 16. For reference, on September 25, the hottest day of the year, temperatures at Mwanza Airport typically range from 67°F to 83°F, while on July 15, the coldest day of the year, they range from 63°F to 82°F. The figure below shows you a compact characterization of the hourly average winter temperatures. 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. Caracas, Venezuela (6,923 miles away) and Cimahi, Indonesia (5,149 miles) are the far-away foreign places with temperatures most similar to Mwanza Airport (view comparison). CloudsThe winter at Mwanza Airport experiences very rapidly decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 59% to 42%. The lowest chance of overcast or mostly cloudy conditions is 40% on August 14. The clearest day of the winter is August 14, with clear, mostly clear, or partly cloudy conditions 60% of the time. For reference, on April 10, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 79%, while on August 14, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 60%. PrecipitationA wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. At Mwanza Airport, the chance of a wet day over the course of the winter is rapidly increasing, starting the season at 10% and ending it at 17%. For reference, the year's highest daily chance of a wet day is 63% on November 26, and its lowest chance is 3% on July 3. RainfallTo show variation within the season and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day. The average sliding 31-day rainfall during the winter at Mwanza Airport is essentially constant, remaining about 0.6 inches throughout, and rarely exceeding 2.2 inches or falling below -0.0 inches. The lowest average 31-day accumulation is 0.3 inches on July 10. SunOver the course of the winter at Mwanza Airport, the length of the day is essentially constant. The shortest day of the winter is June 20, with 11 hours, 59 minutes of daylight and the longest day is August 31, with 12 hours, 4 minutes of daylight. The earliest sunrise of the winter at Mwanza Airport is 6:46 AM on June 1 and the latest sunrise is 8 minutes later at 6:54 AM on July 22. The earliest sunset is 6:45 PM on June 1 and the latest sunset is 9 minutes later at 6:55 PM on July 29. Daylight saving time is not observed at Mwanza Airport during 2024. For reference, on December 21, the longest day of the year, the Sun rises at 6:38 AM and sets 12 hours, 16 minutes later, at 6:54 PM, while on June 20, the shortest day of the year, it rises at 6:50 AM and sets 11 hours, 59 minutes later, at 6:49 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 the winter of 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 at Mwanza Airport is essentially constant during the winter, remaining within 8% of 11% throughout. The lowest chance of a muggy day during the winter is 3% on July 4. For reference, on April 10, the muggiest day of the year, there are muggy conditions 61% of the time, while on July 4, the least muggy day of the year, there are muggy conditions 3% 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 at Mwanza Airport is essentially constant during the winter, remaining within 0.8 miles per hour of 10.3 miles per hour throughout. For reference, on July 16, the windiest day of the year, the daily average wind speed is 11.1 miles per hour, while on January 17, the calmest day of the year, the daily average wind speed is 6.3 miles per hour. The highest daily average wind speed during the winter is 11.1 miles per hour on July 16. The wind direction at Mwanza Airport during the winter is predominantly out of the south from June 1 to August 8 and the east from August 8 to August 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). Temperatures at Mwanza Airport 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 at Mwanza Airport are very rapidly decreasing during the winter, decreasing by 6,521°F, from 7,877°F to 1,355°F, over the course of the season. 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 at Mwanza Airport is gradually increasing during the winter, rising by 0.6 kWh, from 6.2 kWh to 6.8 kWh, over the course of the season. TopographyFor the purposes of this report, the geographical coordinates of Mwanza Airport are -2.444 deg latitude, 32.933 deg longitude, and 3,773 ft elevation. The topography within 2 miles of Mwanza Airport contains only modest variations in elevation, with a maximum elevation change of 394 feet and an average elevation above sea level of 3,815 feet. Within 10 miles contains only modest variations in elevation (722 feet). Within 50 miles contains significant variations in elevation (1,601 feet). The area within 2 miles of Mwanza Airport is covered by cropland (52%), shrubs (37%), and water (11%), within 10 miles by water (52%) and cropland (26%), and within 50 miles by water (45%) and cropland (28%). Data SourcesThis report illustrates the typical weather at Mwanza Airport, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016. Temperature and Dew PointMwanza Airport has a weather station that reported reliably enough during the analysis period that we have included it in our network. When available, historical temperature and dew point measurements are taken directly from this weather station. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required. In the case of missing or erroneous measurements from this station, we fall back on records from nearby stations, adjusted according to typical seasonal and diurnal intra-station differences. For a given day of the year and hour of the day, the fallback station is selected to minimize the prediction error over the years for which there are measurements for both stations. The stations on which we may fall back are Musoma Airport and Bukoba Airport. 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. 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