December Weather in Modderfontein, South Africa

Last updated: August 31, 2025

In December, the average temperature in Modderfontein, South Africa is a comfortable 21°C (69°F). Expect a range where the minimum dips to 10°C (51°F) and can peak at a warm 34°C (93°F). Prepare for some wet days, as you might encounter about 140 mm (5.5 in) of precipitation over 16 days, contributing to an average humidity level of 81%.

December Temperature in Modderfontein

In December in Modderfontein, the average temperature is 21°C (69°F), with maximums reaching up to 34°C (93°F) and minimums dipping as low as 10°C (51°F). It's an ideal time for travelers to enjoy pleasant weather and outdoor activities.

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

The chart illustrates December temperature patterns in Modderfontein, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Modderfontein, December typically has an average temperature of 21°C (69°F), with highs reaching up to 34°C (93°F) and lows dropping to around 10°C (51°F).

Data source: Temperature data for Modderfontein generated using information from the Copernicus Climate Change Service.

December Precipitation in Modderfontein

In Modderfontein in December, the total precipitation amount is 140 mm (5.5 in) spread over 16 days.

December Precipitation Trends in Modderfontein

The chart displays monthly precipitation patterns in Modderfontein, 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 Modderfontein, December typically receives around 140 mm (5.5 inches) of precipitation spread over approximately 16 days.

Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

December Humidity in Modderfontein

In Modderfontein in December humidity is 81%. With an average temperature of 21°C (69°F), this humidity feels like a warm, enveloping blanket that's both heavy and sticky, making outdoor activities feel more strenuous and travel slightly uncomfortable.

December Average Humidity in Modderfontein

This chart illustrates the average monthly humidity levels in Modderfontein, 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 Modderfontein is approximately 81%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Modderfontein

In Modderfontein in December, the maximum UV index is 16, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, making it crucial to take protective measures. For detailed information, you can refer to the Hourly UV Index in Modderfontein.

Maximum UV Index Levels in Modderfontein for December

The chart shows the monthly maximum UV Index (UVI) for Modderfontein 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 Modderfontein typically reaches 16, which falls under the extreme exposure category.

Data source: Modderfontein 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 Modderfontein Compares to Other Months

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

This table compares monthly weather conditions in Modderfontein, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	21°C (70°F)	115 mm (4.5 inches)	79%	extreme
February Weather	21°C (69°F)	126 mm (4.9 inches)	77%	extreme
March Weather	20°C (68°F)	68 mm (2.7 inches)	77%	extreme
April Weather	17°C (63°F)	49 mm (1.9 inches)	81%	very high
May Weather	14°C (58°F)	11 mm (0.4 inches)	82%	high
June Weather	11°C (53°F)	6 mm (0.2 inches)	73%	high
July Weather	11°C (52°F)	2 mm (0.1 inches)	71%	high
August Weather	14°C (58°F)	3 mm (0.1 inches)	68%	very high
September Weather	18°C (65°F)	7 mm (0.3 inches)	74%	extreme
October Weather	19°C (67°F)	54 mm (2.1 inches)	74%	extreme
November Weather	21°C (69°F)	77 mm (3.0 inches)	82%	extreme
December Weather	21°C (69°F)	140 mm (5.5 inches)	81%	extreme