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December Weather in Caledon, South Africa

Last updated: August 31, 2025

In December, the average temperature in Caledon, South Africa is a pleasant 20°C (68°F). Expect a range from a cool 10°C (50°F) at night to a warm 35°C (95°F) during the day. With 27 mm (1.1 in) of precipitation spread over 7 days, you might want to keep an umbrella handy. The air is typically humid, with an average humidity of 77%, so be prepared for a bit of stickiness!

December Temperature in Caledon

In December in Caledon, the average temperature is 20°C (68°F). Maximum temperatures can reach 35°C (95°F), while minimums can drop to as low as 10°C (50°F). This pleasant climate makes Caledon an ideal destination for outdoor activities and exploration during this month.

December Weather in Caledon: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Caledon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Caledon, December typically has an average temperature of 20°C (68°F), with highs reaching up to 35°C (95°F) and lows dropping to around 10°C (50°F).
JanFebMarAprMayJunJulAugSepOctNovDec707168635955535357616467
Data source: Temperature data for Caledon generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Caledon

In Caledon in December, the precipitation amount is 27 mm (1.1 in) accumulated over 7 days.

December Precipitation Trends in Caledon

The chart displays monthly precipitation patterns in Caledon, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Caledon, December typically receives around 27 mm (1.1 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec291632215654585835424227
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Caledon

In Caledon in December, humidity is 77%. With an average temperature of 20°C (68°F), this humidity feels like a warm, sticky embrace, making it essential for travelers to stay hydrated and take breaks in shaded areas to avoid feeling sluggish in the heat.

December Average Humidity in Caledon

This chart illustrates the average monthly humidity levels in Caledon, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Caledon is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec77%80%81%80%78%79%80%77%76%77%75%78%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Caledon

In Caledon in December, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in Caledon, you can check here.

Maximum UV Index Levels in Caledon for December

The chart shows the monthly maximum UV Index (UVI) for Caledon in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Caledon typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141311753459111214
Data source: Caledon December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How December Weather in Caledon Compares to Other Months

Weather in Caledon varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Caledon, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Caledon, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather21°C (71°F)29 mm (1.1 inches)77%extreme
February Weather22°C (71°F)16 mm (0.6 inches)80%extreme
March Weather20°C (68°F)32 mm (1.2 inches)81%extreme
April Weather17°C (63°F)21 mm (0.8 inches)80%high
May Weather15°C (59°F)56 mm (2.2 inches)78%moderate
June Weather13°C (55°F)54 mm (2.1 inches)79%moderate
July Weather12°C (53°F)58 mm (2.3 inches)80%moderate
August Weather12°C (53°F)58 mm (2.3 inches)77%moderate
September Weather14°C (57°F)35 mm (1.4 inches)76%very high
October Weather16°C (62°F)42 mm (1.6 inches)77%extreme
November Weather18°C (64°F)42 mm (1.7 inches)75%extreme
December Weather20°C (68°F)27 mm (1.1 inches)77%extreme

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