Climate and Average Weather Year Round in Caledon South Africa

In Caledon, the summers are warm, dry, and mostly clear and the winters are cold, windy, and partly cloudy. Over the course of the year, the temperature typically varies from 41°F to 81°F and is rarely below 33°F or above 90°F.

Based on the tourism score, the best time of year to visit Caledon for warm-weather activities is from late November to late March.

The warm season lasts for 3.5 months, from December 5 to March 23, with an average daily high temperature above 77°F. The hottest month of the year in Caledon is January, with an average high of 80°F and low of 59°F.

The cool season lasts for 3.5 months, from May 25 to September 9, with an average daily high temperature below 66°F. The coldest month of the year in Caledon is July, with an average low of 41°F and high of 63°F.

In Caledon, 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 Caledon begins around December 6 and lasts for 3.7 months, ending around March 27.

The clearest month of the year in Caledon is February, during which on average the sky is clear, mostly clear, or partly cloudy 86% of the time.

The cloudier part of the year begins around March 27 and lasts for 8.3 months, ending around December 6.

The cloudiest month of the year in Caledon is May, 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 Caledon varies throughout the year.

The wetter season lasts 6.1 months, from April 6 to October 10, with a greater than 16% chance of a given day being a wet day. The month with the most wet days in Caledon is June, with an average of 6.7 days with at least 0.04 inches of precipitation.

The drier season lasts 5.9 months, from October 10 to April 6. The month with the fewest wet days in Caledon is January, with an average of 3.0 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 Caledon is June, with an average of 6.7 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 24% on June 15.

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. Caledon experiences some seasonal variation in monthly rainfall.

Rain falls throughout the year in Caledon. The month with the most rain in Caledon is June, with an average rainfall of 2.0 inches.

The month with the least rain in Caledon is February, with an average rainfall of 0.8 inches.

The length of the day in Caledon varies significantly over the course of the year. In 2024, the shortest day is June 20, with 9 hours, 52 minutes of daylight; the longest day is December 21, with 14 hours, 27 minutes of daylight.

The earliest sunrise is at 5:23 AM on December 5, and the latest sunrise is 2 hours, 26 minutes later at 7:49 AM on June 29. The earliest sunset is at 5:39 PM on June 10, and the latest sunset is 2 hours, 19 minutes later at 7:58 PM on January 7.

Daylight saving time (DST) is not observed in Caledon 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.

The perceived humidity level in Caledon, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, staying within 2% of 2% throughout.

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

The windier part of the year lasts for 6.6 months, from August 25 to March 12, with average wind speeds of more than 10.2 miles per hour. The windiest month of the year in Caledon is December, with an average hourly wind speed of 11.2 miles per hour.

The calmer time of year lasts for 5.4 months, from March 12 to August 25. The calmest month of the year in Caledon is April, with an average hourly wind speed of 9.3 miles per hour.

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

The wind is most often from the east for 2.5 months, from February 1 to April 16 and for 1.9 months, from October 9 to December 6, with a peak percentage of 41% on March 2. The wind is most often from the west for 5.8 months, from April 16 to October 9, with a peak percentage of 46% on August 27. The wind is most often from the south for 1.8 months, from December 6 to February 1, with a peak percentage of 37% on January 1.

Caledon 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 water temperature experiences some seasonal variation over the course of the year.

The time of year with warmer water lasts for 2.7 months, from December 18 to March 8, with an average temperature above 66°F. The month of the year in Caledon with the warmest water is January, with an average temperature of 67°F.

The time of year with cooler water lasts for 4.1 months, from June 7 to October 12, with an average temperature below 60°F. The month of the year in Caledon with the coolest water is August, with an average temperature of 59°F.

To characterize how pleasant the weather is in Caledon 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 Caledon for general outdoor tourist activities is from late November to late March, with a peak score in the last week of January.

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 Caledon for hot-weather activities is from early January to late February, with a peak score in the last 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 Caledon typically lasts for 10 months (306 days), from around August 10 to around June 12, rarely starting after September 6, or ending before May 18.

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 Caledon should appear around July 24, only rarely appearing before July 17 or after July 31.

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 extreme seasonal variation over the course of the year.

The brighter period of the year lasts for 3.4 months, from November 8 to February 20, with an average daily incident shortwave energy per square meter above 7.4 kWh. The brightest month of the year in Caledon is January, with an average of 8.5 kWh.

The darker period of the year lasts for 3.7 months, from April 28 to August 17, with an average daily incident shortwave energy per square meter below 3.7 kWh. The darkest month of the year in Caledon is June, with an average of 2.6 kWh.

For the purposes of this report, the geographical coordinates of Caledon are -34.230 deg latitude, 19.427 deg longitude, and 853 ft elevation.

The topography within 2 miles of Caledon contains very significant variations in elevation, with a maximum elevation change of 1,578 feet and an average elevation above sea level of 966 feet. Within 10 miles contains very significant variations in elevation (3,330 feet). Within 50 miles also contains extreme variations in elevation (6,837 feet).

The area within 2 miles of Caledon is covered by cropland (70%), shrubs (14%), and artificial surfaces (12%), within 10 miles by cropland (79%) and shrubs (19%), and within 50 miles by cropland (35%) and water (31%).