Fall Weather in Jansenville South Africa

Daily high temperatures decrease by 19°F, from 91°F to 72°F, rarely falling below 60°F or exceeding 101°F.

Daily low temperatures decrease by 18°F, from 59°F to 41°F, rarely falling below 33°F or exceeding 66°F.

For reference, on January 26, the hottest day of the year, temperatures in Jansenville typically range from 60°F to 94°F, while on July 2, the coldest day of the year, they range from 37°F to 70°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.

Eastvale, United States (10,282 miles away) and Chihuahua, Mexico (9,536 miles) are the far-away foreign places with temperatures most similar to Jansenville (view comparison).

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The fall in Jansenville experiences rapidly increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 18% to 33%. The highest chance of overcast or mostly cloudy conditions is 36% on May 10.

The clearest day of the fall is March 1, with clear, mostly clear, or partly cloudy conditions 82% of the time.

For reference, on October 6, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 37%, while on February 11, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 85%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Jansenville, the chance of a wet day over the course of the fall is very rapidly decreasing, starting the season at 24% and ending it at 7%.

For reference, the year's highest daily chance of a wet day is 26% on February 15, and its lowest chance is 6% on June 27.

Rainfall

To 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 Jansenville is rapidly decreasing, starting the season at 1.9 inches, when it rarely exceeds 3.7 inches or falls below 0.5 inches, and ending the season at 0.5 inches, when it rarely exceeds 1.6 inches.

Over the course of the fall in Jansenville, 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 2 hours, 39 minutes, implying an average daily decrease of 1 minute, 45 seconds, and weekly decrease of 12 minutes, 12 seconds.

The shortest day of the fall is May 31, with 10 hours, 7 minutes of daylight and the longest day is March 1, with 12 hours, 46 minutes of daylight.

The earliest sunrise of the fall in Jansenville is 6:10 AM on March 1 and the latest sunrise is 1 hour, 5 minutes later at 7:15 AM on May 31.

The latest sunset is 6:56 PM on March 1 and the earliest sunset is 1 hour, 34 minutes earlier at 5:22 PM on May 31.

Daylight saving time is not observed in Jansenville during 2024.

For reference, on December 21, the longest day of the year, the Sun rises at 5:09 AM and sets 14 hours, 20 minutes later, at 7:29 PM, while on June 20, the shortest day of the year, it rises at 7:23 AM and sets 9 hours, 59 minutes later, at 5:22 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.

The 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.

We 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 Jansenville is gradually decreasing during the fall, falling from 3% to 0% over the course of the season.

For reference, on January 27, the muggiest day of the year, there are muggy conditions 4% of the time, while on April 24, the least muggy day of the year, there are muggy conditions 0% of the time.

This 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 Jansenville is gradually increasing during the fall, increasing from 8.4 miles per hour to 9.4 miles per hour over the course of the season.

For reference, on July 18, the windiest day of the year, the daily average wind speed is 9.9 miles per hour, while on March 28, the calmest day of the year, the daily average wind speed is 7.8 miles per hour.

The lowest daily average wind speed during the fall is 7.8 miles per hour on March 30.

The wind direction in Jansenville during the fall is predominantly out of the south from March 1 to March 11, the east from March 11 to April 4, and the west from April 4 to May 31.

Definitions 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 Jansenville typically lasts for 8.6 months (261 days), from around September 11 to around May 30, rarely starting before July 25 or after October 22, and rarely ending before May 4 or after June 19.

During the fall in Jansenville, the chance that a given day is within the growing season is very rapidly decreasing falling from 100% to 47% over the course of the season.

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 Jansenville are very rapidly increasing during the fall, increasing by 1,314°F, from 3,834°F to 5,148°F, over the course of the season.

This 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 Jansenville is very rapidly decreasing during the fall, falling by 3.6 kWh, from 6.8 kWh to 3.2 kWh, over the course of the season.

For the purposes of this report, the geographical coordinates of Jansenville are -32.943 deg latitude, 24.672 deg longitude, and 1,378 ft elevation.

The topography within 2 miles of Jansenville contains only modest variations in elevation, with a maximum elevation change of 377 feet and an average elevation above sea level of 1,431 feet. Within 10 miles contains only modest variations in elevation (1,762 feet). Within 50 miles contains very significant variations in elevation (6,470 feet).

The area within 2 miles of Jansenville is covered by shrubs (93%), within 10 miles by shrubs (99%), and within 50 miles by shrubs (93%).