Average Weather in September in Mandeni South Africa
Daily high temperatures are around 77°F, rarely falling below 66°F or exceeding 88°F.
Daily low temperatures increase by 3°F, from 58°F to 61°F, rarely falling below 53°F or exceeding 66°F.
For reference, on January 26, the hottest day of the year, temperatures in Mandeni typically range from 71°F to 85°F, while on July 4, the coldest day of the year, they range from 52°F to 74°F.
Average High and Low Temperature in September
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.
Average Hourly Temperature in September
The month of September in Mandeni experiences increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 21% to 31%.
The clearest day of the month is September 1, with clear, mostly clear, or partly cloudy conditions 79% of the time.
For reference, on November 14, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 41%, while on July 29, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 86%.
Cloud Cover Categories in September
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Mandeni, the chance of a wet day over the course of September is rapidly increasing, starting the month at 11% and ending it at 18%.
For reference, the year's highest daily chance of a wet day is 33% on February 7, and its lowest chance is 7% on July 8.
Probability of Precipitation in September
The average sliding 31-day rainfall during September in Mandeni is increasing, starting the month at 1.2 inches, when it rarely exceeds 3.5 inches or falls below 0.1 inches, and ending the month at 1.9 inches, when it rarely exceeds 3.7 inches or falls below 0.3 inches.
Average Monthly Rainfall in September
Over the course of September in Mandeni, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 50 minutes, implying an average daily increase of 1 minute, 43 seconds, and weekly increase of 11 minutes, 59 seconds.
The shortest day of the month is September 1, with 11 hours, 31 minutes of daylight and the longest day is September 30, with 12 hours, 21 minutes of daylight.
Hours of Daylight and Twilight in September
The latest sunrise of the month in Mandeni is 6:08 AM on September 1 and the earliest sunrise is 35 minutes earlier at 5:34 AM on September 30.
The earliest sunset is 5:40 PM on September 1 and the latest sunset is 15 minutes later at 5:54 PM on September 30.
Daylight saving time is not observed in Mandeni during 2021.
For reference, on December 21, the longest day of the year, the Sun rises at 4:52 AM and sets 14 hours, 1 minute later, at 6:52 PM, while on June 21, the shortest day of the year, it rises at 6:47 AM and sets 10 hours, 17 minutes later, at 5:04 PM.
Sunrise & Sunset with Twilight in September
The figure below presents a compact representation of key lunar data for September 2021. 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.
Moon Rise, Set & Phases in September
The chance that a given day will be muggy in Mandeni is increasing during September, rising from 1% to 7% over the course of the month.
For reference, on February 11, the muggiest day of the year, there are muggy conditions 81% of the time, while on July 13, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in September
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The average hourly wind speed in Mandeni is gradually increasing during September, increasing from 11.0 miles per hour to 11.6 miles per hour over the course of the month.
For reference, on October 12, the windiest day of the year, the daily average wind speed is 11.7 miles per hour, while on May 10, the calmest day of the year, the daily average wind speed is 8.8 miles per hour.
Average Wind Speed in September
The hourly average wind direction in Mandeni throughout September is predominantly from the south, with a peak proportion of 40% on September 18.
Wind Direction in September
Mandeni 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 Mandeni is essentially constant during September, remaining around 70°F throughout.
Average Water Temperature in September
Temperatures in Mandeni 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.
Time Spent in Various Temperature Bands and the Growing Season in September
The average accumulated growing degree days in Mandeni are rapidly increasing during September, increasing by 525°F, from 885°F to 1,409°F, over the course of the month.
Growing Degree Days in September
The average daily incident shortwave solar energy in Mandeni is gradually increasing during September, rising by 0.8 kWh, from 4.8 kWh to 5.6 kWh, over the course of the month.
Average Daily Incident Shortwave Solar Energy in September
For the purposes of this report, the geographical coordinates of Mandeni are -29.147 deg latitude, 31.414 deg longitude, and 289 ft elevation.
The topography within 2 miles of Mandeni contains significant variations in elevation, with a maximum elevation change of 689 feet and an average elevation above sea level of 307 feet. Within 10 miles contains significant variations in elevation (1,932 feet). Within 50 miles contains very significant variations in elevation (5,525 feet).
The area within 2 miles of Mandeni is covered by cropland (37%), shrubs (27%), grassland (26%), and artificial surfaces (10%), within 10 miles by cropland (46%) and grassland (22%), and within 50 miles by water (41%) and cropland (28%).
This report illustrates the typical weather in Mandeni, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Temperature and Dew Point
There are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Mandeni.
For each station, the records are corrected for the elevation difference between that station and Mandeni according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
The estimated value at Mandeni is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Mandeni and a given station.
The stations contributing to this reconstruction are: King Shaka International Airport (48%, 59 kilometers, southwest); Richard Bay Airport (31%, 80 kilometers, northeast); and Prince Mangosuthu Buthelez Airport (21%, 92 kilometers, north).
Time zones for airports and weather stations are provided by AskGeo.com .