September Weather in Methven New ZealandDaily high temperatures increase by 4°F, from 53°F to 57°F, rarely falling below 46°F or exceeding 66°F. Daily low temperatures increase by 3°F, from 37°F to 40°F, rarely falling below 30°F or exceeding 47°F. For reference, on January 27, the hottest day of the year, temperatures in Methven typically range from 51°F to 69°F, while on June 30, the coldest day of the year, they range from 33°F to 48°F. The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on September. 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. La Junta, Chile (5,219 miles away) is the far-away foreign place with temperatures most similar to Methven (view comparison). CloudsThe month of September in Methven experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 46% throughout the month. The clearest day of the month is September 6, with clear, mostly clear, or partly cloudy conditions 55% of the time. For reference, on December 12, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 52%, while on March 4, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 58%. PrecipitationA wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Methven, the chance of a wet day over the course of September is increasing, starting the month at 33% and ending it at 38%. For reference, the year's highest daily chance of a wet day is 39% on October 2, and its lowest chance is 26% on February 11. Over the course of September in Methven, the chance of a day with only rain increases from 32% to 38%, the chance of a day with mixed snow and rain remains an essentially constant 1% throughout, and the chance of a day with only snow remains an essentially constant 0% throughout. 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 September in Methven is essentially constant, remaining about 2.7 inches throughout, and rarely exceeding 4.4 inches or falling below 0.9 inches. The lowest average 31-day accumulation is 2.6 inches on September 7. SunOver the course of September in Methven, the length of the day is rapidly increasing. From the start to the end of the month, the length of the day increases by 1 hour, 25 minutes, implying an average daily increase of 2 minutes, 56 seconds, and weekly increase of 20 minutes, 31 seconds. The shortest day of the month is September 1, with 11 hours, 6 minutes of daylight and the longest day is September 30, with 12 hours, 31 minutes of daylight. The earliest sunrise of the month in Methven is 6:11 AM on September 28 and the latest sunrise is 58 minutes later at 7:09 AM on September 29. The earliest sunset is 6:06 PM on September 1 and the latest sunset is 1 hour, 33 minutes later at 7:39 PM on September 30. Daylight saving time (DST) ends at 3:00 AM on September 29, 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 5:48 AM and sets 15 hours, 27 minutes later, at 9:14 PM, while on June 20, the shortest day of the year, it rises at 8:07 AM and sets 8 hours, 56 minutes later, at 5:02 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 September 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 Methven is essentially constant during September, remaining around 0% throughout. For reference, on January 17, the muggiest day of the year, there are muggy conditions 0% of the time, while on March 13, 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 Methven is gradually increasing during September, increasing from 8.5 miles per hour to 9.5 miles per hour over the course of the month. For reference, on October 7, the windiest day of the year, the daily average wind speed is 9.7 miles per hour, while on July 6, the calmest day of the year, the daily average wind speed is 7.5 miles per hour. The hourly average wind direction in Methven throughout September is predominantly from the west, with a peak proportion of 39% on September 20. Water TemperatureMethven 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 Methven is essentially constant during September, remaining within 1°F of 52°F throughout. 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 Methven typically lasts for 5.8 months (175 days), from around October 25 to around April 18, rarely starting before September 20 or after November 30, and rarely ending before March 21 or after May 12. The month of September in Methven is very likely fully outside of the growing season, with the chance that a given day is in the growing season increasing from 1% 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 Methven are gradually increasing during September, increasing by 42°F, from 26°F to 67°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 Methven is increasing during September, rising by 1.3 kWh, from 3.3 kWh to 4.6 kWh, over the course of the month. TopographyFor the purposes of this report, the geographical coordinates of Methven are -43.633 deg latitude, 171.650 deg longitude, and 1,047 ft elevation. The topography within 2 miles of Methven contains only modest variations in elevation, with a maximum elevation change of 223 feet and an average elevation above sea level of 1,047 feet. Within 10 miles contains only modest variations in elevation (4,531 feet). Within 50 miles also contains extreme variations in elevation (9,101 feet). The area within 2 miles of Methven is covered by cropland (33%), grassland (30%), and trees (28%), within 10 miles by cropland (36%) and trees (32%), and within 50 miles by grassland (43%) and water (20%). Data SourcesThis report illustrates the typical weather in Methven, 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, Christchurch International Airport, in our network suitable to be used as a proxy for the historical temperature and dew point records of Methven. At a distance of 73 kilometers from Methven, 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 Methven 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. |