Climate and Average Weather Year Round in Driefontein South Africa

In Driefontein, the wet season is warm and partly cloudy and the dry season is comfortable and mostly clear. Over the course of the year, the temperature typically varies from 36°F to 78°F and is rarely below 31°F or above 85°F.

Based on the tourism score, the best time of year to visit Driefontein for warm-weather activities is from early January to early May.

The warm season lasts for 4.1 months, from November 8 to March 11, with an average daily high temperature above 75°F. The hottest month of the year in Driefontein is January, with an average high of 78°F and low of 59°F.

The cool season lasts for 1.8 months, from June 2 to July 27, with an average daily high temperature below 67°F. The coldest month of the year in Driefontein is July, with an average low of 37°F and high of 66°F.

In Driefontein, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.

The clearer part of the year in Driefontein begins around February 13 and lasts for 7.6 months, ending around September 30.

The clearest month of the year in Driefontein is June, during which on average the sky is clear, mostly clear, or partly cloudy 85% of the time.

The cloudier part of the year begins around September 30 and lasts for 4.5 months, ending around February 13.

The cloudiest month of the year in Driefontein is November, during which on average the sky is overcast or mostly cloudy 43% of the time.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Driefontein varies very significantly throughout the year.

The wetter season lasts 5.6 months, from October 8 to March 28, with a greater than 31% chance of a given day being a wet day. The month with the most wet days in Driefontein is December, with an average of 18.0 days with at least 0.04 inches of precipitation.

The drier season lasts 6.4 months, from March 28 to October 8. The month with the fewest wet days in Driefontein is June, with an average of 1.2 days with at least 0.04 inches of precipitation.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. The month with the most days of rain alone in Driefontein is December, with an average of 18.0 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 60% on December 16.

Rainfall

To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Driefontein experiences extreme seasonal variation in monthly rainfall.

The rainy period of the year lasts for 9.5 months, from July 31 to May 17, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain in Driefontein is December, with an average rainfall of 5.2 inches.

The rainless period of the year lasts for 2.5 months, from May 17 to July 31. The month with the least rain in Driefontein is June, with an average rainfall of 0.3 inches.

The length of the day in Driefontein varies over the course of the year. In 2024, the shortest day is June 20, with 10 hours, 26 minutes of daylight; the longest day is December 21, with 13 hours, 51 minutes of daylight.

The earliest sunrise is at 4:55 AM on December 1, and the latest sunrise is 1 hour, 52 minutes later at 6:48 AM on July 2. The earliest sunset is at 5:11 PM on June 9, and the latest sunset is 1 hour, 45 minutes later at 6:57 PM on January 12.

Daylight saving time (DST) is not observed in Driefontein during 2024.

The figure below presents a compact representation of key lunar data for 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.

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.

Driefontein experiences some seasonal variation in the perceived humidity.

The muggier period of the year lasts for 3.2 months, from December 5 to March 13, during which time the comfort level is muggy, oppressive, or miserable at least 3% of the time. The month with the most muggy days in Driefontein is January, with 3.5 days that are muggy or worse.

The least muggy day of the year is July 8, when muggy conditions are essentially unheard of.

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 Driefontein experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 5.8 months, from May 30 to November 25, with average wind speeds of more than 6.0 miles per hour. The windiest month of the year in Driefontein is September, with an average hourly wind speed of 7.1 miles per hour.

The calmer time of year lasts for 6.2 months, from November 25 to May 30. The calmest month of the year in Driefontein is March, with an average hourly wind speed of 4.9 miles per hour.

The predominant average hourly wind direction in Driefontein varies throughout the year.

The wind is most often from the west for 5.7 months, from April 7 to September 29, with a peak percentage of 57% on June 16. The wind is most often from the east for 6.3 months, from September 29 to April 7, with a peak percentage of 42% on January 1.

To characterize how pleasant the weather is in Driefontein throughout the year, we compute two travel scores.

The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best time of year to visit Driefontein for general outdoor tourist activities is from early January to early May, with a peak score in the third week of March.

The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Driefontein for hot-weather activities is from mid December to early March, with a peak score in the third week of January.

Methodology

For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.

Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.

Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.

Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.

Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.

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 Driefontein typically lasts for 10 months (314 days), from around August 1 to around June 11, rarely starting after September 5, or ending before May 20.

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.

Based on growing degree days alone, the first spring blooms in Driefontein should appear around July 22, only rarely appearing before July 19 or after July 27.

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 experiences significant seasonal variation over the course of the year.

The brighter period of the year lasts for 4.1 months, from October 29 to March 1, with an average daily incident shortwave energy per square meter above 6.7 kWh. The brightest month of the year in Driefontein is January, with an average of 7.3 kWh.

The darker period of the year lasts for 2.8 months, from May 8 to August 2, with an average daily incident shortwave energy per square meter below 4.7 kWh. The darkest month of the year in Driefontein is June, with an average of 4.1 kWh.

For the purposes of this report, the geographical coordinates of Driefontein are -27.018 deg latitude, 30.450 deg longitude, and 4,413 ft elevation.

The topography within 2 miles of Driefontein contains only modest variations in elevation, with a maximum elevation change of 171 feet and an average elevation above sea level of 4,342 feet. Within 10 miles contains only modest variations in elevation (1,709 feet). Within 50 miles contains very significant variations in elevation (5,817 feet).

The area within 2 miles of Driefontein is covered by cropland (61%) and water (35%), within 10 miles by grassland (55%) and cropland (38%), and within 50 miles by grassland (71%) and cropland (24%).