Fall Weather in Merimbula New South Wales, AustraliaDaily high temperatures decrease by 13°F, from 75°F to 62°F, rarely falling below 58°F or exceeding 82°F. Daily low temperatures decrease by 12°F, from 63°F to 51°F, rarely falling below 45°F or exceeding 68°F. For reference, on January 25, the hottest day of the year, temperatures in Merimbula typically range from 64°F to 76°F, while on July 19, the coldest day of the year, they range from 48°F to 59°F. The figure below shows you a compact characterization of the hourly average fall 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. Cape Town, Western Cape, South Africa (6,641 miles away) is the far-away foreign place with temperatures most similar to Merimbula (view comparison). CloudsThe fall in Merimbula experiences increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 29% to 39%. The highest chance of overcast or mostly cloudy conditions is 39% on May 28. The lowest chance of overcast or mostly cloudy conditions is 29% on March 2. The clearest day of the fall is March 2, with clear, mostly clear, or partly cloudy conditions 71% of the time. For reference, on November 27, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 42%, while on August 10, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 73%. PrecipitationA wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Merimbula, the chance of a wet day over the course of the fall is essentially constant, remaining around 19% throughout. For reference, the year's highest daily chance of a wet day is 29% on November 20, and its lowest chance is 14% on July 28. 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 fall in Merimbula is gradually decreasing, starting the season at 2.6 inches, when it rarely exceeds 5.6 inches or falls below 0.3 inches, and ending the season at 2.3 inches, when it rarely exceeds 5.2 inches or falls below 0.5 inches. The lowest average 31-day accumulation is 1.9 inches on May 9. SunOver the course of the fall in Merimbula, the length of the day is very rapidly decreasing. From the start to the end of the season, the length of the day decreases by 3 hours, 5 minutes, implying an average daily decrease of 2 minutes, 2 seconds, and weekly decrease of 14 minutes, 13 seconds. The shortest day of the fall is May 31, with 9 hours, 48 minutes of daylight and the longest day is March 1, with 12 hours, 53 minutes of daylight. The latest sunrise of the fall in Merimbula is 7:18 AM on April 6 and the earliest sunrise is 59 minutes earlier at 6:19 AM on April 7. The latest sunset is 7:39 PM on March 1 and the earliest sunset is 2 hours, 47 minutes earlier at 4:52 PM on May 31. Daylight saving time (DST) ends at 2:00 AM on April 7, 2024, shifting sunrise and sunset to be an hour earlier. For reference, on December 21, the longest day of the year, the Sun rises at 5:37 AM and sets 14 hours, 42 minutes later, at 8:19 PM, while on June 20, the shortest day of the year, it rises at 7:13 AM and sets 9 hours, 38 minutes later, at 4:50 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 fall 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 Merimbula is rapidly decreasing during the fall, falling from 13% to 0% over the course of the season. For reference, on February 7, the muggiest day of the year, there are muggy conditions 17% of the time, while on May 25, 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 Merimbula is essentially constant during the fall, remaining within 0.3 miles per hour of 7.2 miles per hour throughout. For reference, on June 24, the windiest day of the year, the daily average wind speed is 7.8 miles per hour, while on April 30, the calmest day of the year, the daily average wind speed is 7.0 miles per hour. The lowest daily average wind speed during the fall is 7.0 miles per hour on April 30. The wind direction in Merimbula during the fall is predominantly out of the north from March 1 to April 5, the south from April 5 to April 21, and the west from April 21 to May 31. Water TemperatureMerimbula 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 Merimbula is decreasing during the fall, falling by 6°F, from 71°F to 64°F, over the course of the season. 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 Merimbula 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 Merimbula are very rapidly increasing during the fall, increasing by 1,165°F, from 2,929°F to 4,093°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 Merimbula is very rapidly decreasing during the fall, falling by 3.7 kWh, from 6.1 kWh to 2.4 kWh, over the course of the season. TopographyFor the purposes of this report, the geographical coordinates of Merimbula are -36.889 deg latitude, 149.910 deg longitude, and 13 ft elevation. The topography within 2 miles of Merimbula contains significant variations in elevation, with a maximum elevation change of 686 feet and an average elevation above sea level of 112 feet. Within 10 miles contains significant variations in elevation (2,201 feet). Within 50 miles contains large variations in elevation (4,409 feet). The area within 2 miles of Merimbula is covered by trees (45%) and water (36%), within 10 miles by trees (49%) and water (42%), and within 50 miles by water (45%) and trees (42%). Data SourcesThis report illustrates the typical weather in Merimbula, 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, Canberra International Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of Merimbula. At a distance of 187 kilometers from Merimbula, 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 Merimbula to the nearest station, increasing from 0% at 150 kilometers to 100% at 200 kilometers. In this case, the MERRA-2 weight is 43%, making the weight assigned to the weather station 57%. 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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