Winter Weather in Colesberg South Africa

Daily high temperatures increase by 6°F, from 62°F to 68°F, rarely falling below 50°F or exceeding 78°F. The lowest daily average high temperature is 59°F on June 27.

Daily low temperatures increase by 4°F, from 37°F to 41°F, rarely falling below 27°F or exceeding 49°F. The lowest daily average low temperature is 33°F on July 2.

For reference, on January 2, the hottest day of the year, temperatures in Colesberg typically range from 58°F to 86°F, while on July 2, the coldest day of the year, they range from 33°F to 59°F.

The figure below shows you a compact characterization of the hourly average winter 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.

Villa Mercedes, Argentina (5,116 miles away) is the far-away foreign place with temperatures most similar to Colesberg (view comparison).

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The winter in Colesberg experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 22% throughout the season. The lowest chance of overcast or mostly cloudy conditions is 18% on August 9.

The clearest day of the winter is August 9, with clear, mostly clear, or partly cloudy conditions 82% of the time.

For reference, on October 19, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 31%, while on February 22, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 83%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Colesberg, the chance of a wet day over the course of the winter is essentially constant, remaining around 4% throughout.

For reference, the year's highest daily chance of a wet day is 25% on February 24, and its lowest chance is 3% on July 7.

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 winter in Colesberg is essentially constant, remaining about 0.3 inches throughout, and rarely exceeding 1.4 inches or falling below -0.0 inches.

The lowest average 31-day accumulation is 0.2 inches on July 11.

Over the course of the winter in Colesberg, the length of the day is rapidly increasing. From the start to the end of the season, the length of the day increases by 1 hour, 11 minutes, implying an average daily increase of 47 seconds, and weekly increase of 5 minutes, 27 seconds.

The shortest day of the winter is June 20, with 10 hours, 9 minutes of daylight and the longest day is August 31, with 11 hours, 28 minutes of daylight.

The latest sunrise of the winter in Colesberg is 7:17 AM on July 1 and the earliest sunrise is 42 minutes earlier at 6:36 AM on August 31.

The earliest sunset is 5:24 PM on June 9 and the latest sunset is 39 minutes later at 6:03 PM on August 31.

Daylight saving time is not observed in Colesberg during 2024.

For reference, on December 21, the longest day of the year, the Sun rises at 5:13 AM and sets 14 hours, 8 minutes later, at 7:22 PM, while on June 20, the shortest day of the year, it rises at 7:16 AM and sets 10 hours, 9 minutes later, at 5:25 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 winter 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 Colesberg is essentially constant during the winter, remaining around 0% throughout.

For reference, on February 19, the muggiest day of the year, there are muggy conditions 2% of the time, while on April 10, 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 Colesberg is increasing during the winter, increasing from 9.3 miles per hour to 11.0 miles per hour over the course of the season.

For reference, on November 13, the windiest day of the year, the daily average wind speed is 11.3 miles per hour, while on March 30, the calmest day of the year, the daily average wind speed is 8.5 miles per hour.

The wind direction in Colesberg during the winter is predominantly out of the north from June 1 to August 20 and the west from August 20 to August 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 Colesberg typically lasts for 8.7 months (263 days), from around September 2 to around May 24, rarely starting before August 9 or after September 29, and rarely ending before April 27 or after June 13.

The winter in Colesberg is more likely than not fully outside of the growing season, with the chance that a given day is in the growing season reaching a low of 0% on July 12.

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 Colesberg are very rapidly decreasing during the winter, decreasing by 4,183°F, from 4,432°F to 249°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 Colesberg is rapidly increasing during the winter, rising by 1.7 kWh, from 3.7 kWh to 5.4 kWh, over the course of the season.

The lowest average daily incident shortwave solar energy during the winter is 3.5 kWh on June 19.

For the purposes of this report, the geographical coordinates of Colesberg are -30.720 deg latitude, 25.097 deg longitude, and 4,491 ft elevation.

The topography within 2 miles of Colesberg contains significant variations in elevation, with a maximum elevation change of 607 feet and an average elevation above sea level of 4,585 feet. Within 10 miles contains significant variations in elevation (1,539 feet). Within 50 miles contains very significant variations in elevation (3,114 feet).

The area within 2 miles of Colesberg is covered by shrubs (100%), within 10 miles by shrubs (100%), and within 50 miles by shrubs (81%) and grassland (15%).