Summer Weather in Ambam CameroonDaily high temperatures are around 80°F, rarely falling below 75°F or exceeding 85°F. The lowest daily average high temperature is 79°F on July 30. Daily low temperatures are around 69°F, rarely falling below 67°F or exceeding 71°F. The lowest daily average low temperature is 68°F on July 25. For reference, on February 25, the hottest day of the year, temperatures in Ambam typically range from 71°F to 86°F, while on October 23, the coldest day of the year, they range from 68°F to 82°F. The figure below shows you a compact characterization of the hourly average summer 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. San Isidro, Costa Rica (6,538 miles away) and Salatiga, Indonesia (6,878 miles) are the far-away foreign places with temperatures most similar to Ambam (view comparison). CloudsThe summer in Ambam experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 76% throughout the season. The lowest chance of overcast or mostly cloudy conditions is 73% on July 16. The clearest day of the summer is July 16, with clear, mostly clear, or partly cloudy conditions 27% of the time. For reference, on April 20, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 85%, while on December 29, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 28%. PrecipitationA wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Ambam, the chance of a wet day over the course of the summer is increasing, starting the season at 50% and ending it at 55%. For reference, the year's highest daily chance of a wet day is 87% on October 22, and its lowest chance is 14% on December 31. 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 summer in Ambam is essentially constant, remaining about 2.8 inches throughout, and rarely exceeding 7.2 inches or falling below 0.1 inches. The lowest average 31-day accumulation is 1.4 inches on July 21. SunOver the course of the summer in Ambam, the length of the day is essentially constant. The shortest day of the summer is August 31, with 12 hours, 9 minutes of daylight and the longest day is June 19, with 12 hours, 16 minutes of daylight. The earliest sunrise of the summer in Ambam is 6:05 AM on June 1 and the latest sunrise is 9 minutes later at 6:14 AM on July 31. The latest sunset is 6:28 PM on July 20 and the earliest sunset is 9 minutes earlier at 6:19 PM on August 31. Daylight saving time is not observed in Ambam during 2024. For reference, on June 20, the longest day of the year, the Sun rises at 6:08 AM and sets 12 hours, 16 minutes later, at 6:24 PM, while on December 21, the shortest day of the year, it rises at 6:13 AM and sets 11 hours, 59 minutes later, at 6:12 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 summer 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 in Ambam is gradually decreasing during the summer, falling from 99% to 96% over the course of the season. The lowest chance of a muggy day during the summer is 94% on July 30. For reference, on April 22, the muggiest day of the year, there are muggy conditions 100% of the time, while on January 17, the least muggy day of the year, there are muggy conditions 94% 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 Ambam is essentially constant during the summer, remaining within 0.2 miles per hour of 1.5 miles per hour throughout. For reference, on August 6, the windiest day of the year, the daily average wind speed is 1.7 miles per hour, while on October 26, the calmest day of the year, the daily average wind speed is 1.3 miles per hour. The highest daily average wind speed during the summer is 1.7 miles per hour on August 7. The hourly average wind direction in Ambam throughout the summer is predominantly from the west, with a peak proportion of 96% on July 28. 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 Ambam 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 Ambam are very rapidly increasing during the summer, increasing by 2,095°F, from 3,931°F to 6,026°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 in Ambam is essentially constant during the summer, remaining within 0.1 kWh of 4.4 kWh throughout. The lowest average daily incident shortwave solar energy during the summer is 4.3 kWh on June 26. TopographyFor the purposes of this report, the geographical coordinates of Ambam are 2.383 deg latitude, 11.283 deg longitude, and 1,870 ft elevation. The topography within 2 miles of Ambam contains only modest variations in elevation, with a maximum elevation change of 482 feet and an average elevation above sea level of 1,937 feet. Within 10 miles contains only modest variations in elevation (1,319 feet). Within 50 miles contains very significant variations in elevation (2,149 feet). The area within 2 miles of Ambam is covered by cropland (49%), trees (31%), and grassland (11%), within 10 miles by cropland (43%) and trees (38%), and within 50 miles by trees (62%) and cropland (21%). Data SourcesThis report illustrates the typical weather in Ambam, 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, Yaounde, in our network suitable to be used as a proxy for the historical temperature and dew point records of Ambam. At a distance of 152 kilometers from Ambam, further than our threshold of 150 kilometers, this station is deemed insufficiently nearby to be relied upon as our primary source for temperature and dew point records. Consequently, the station records are blended with interpolated values from NASA's MERRA-2 satellite-era reanalysis , and both are corrected for elevation differences according to the International Standard Atmosphere . The weight assigned to the MERRA-2 value depends on the distance from Ambam to the nearest station, increasing from 0% at 150 kilometers to 100% at 200 kilometers. In this case, the MERRA-2 weight is 4%, making the weight assigned to the weather station 96%. 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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