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December Weather in Jansenville, South Africa

Last updated: August 31, 2025

In Jansenville, South Africa, the average temperature in December hovers around 22°C (72°F). However, stay prepared for temperature swings, as it can dip to a chilly 9°C (49°F) or soar to a scorching 44°C (111°F). During this month, you can expect about 43 mm (1.7 in) of rainfall spread over 6 days, with an average humidity level of 73%, making for a typical yet diverse climate experience.

December Temperature in Jansenville

In December in Jansenville, the average temperature is 22°C (72°F). Maximums can reach 44°C (111°F) and minimums can be as low as 9°C (49°F). It's advisable to pack both lightweight clothing for the warmth and warmer layers for cooler evenings when traveling during this time.

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

The chart illustrates December temperature patterns in Jansenville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Jansenville, December typically has an average temperature of 22°C (72°F), with highs reaching up to 44°C (111°F) and lows dropping to around 9°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec767572666158565662666972
Data source: Temperature data for Jansenville 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 Jansenville

In Jansenville in December, the precipitation amount is 43 mm (1.7 in) over a period of 6 days.

December Precipitation Trends in Jansenville

The chart displays monthly precipitation patterns in Jansenville, 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 Jansenville, December typically receives around 43 mm (1.7 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec264328301338920242543
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Jansenville

In Jansenville in December, humidity is 73%. With an average temperature of 22°C (72°F), this humidity feels like a warm embrace that can make outdoor activities feel sticky and heavy, so it's best to stay hydrated and take frequent breaks while exploring.

December Average Humidity in Jansenville

This chart illustrates the average monthly humidity levels in Jansenville, 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 Jansenville is approximately 73%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%75%84%85%83%79%77%68%77%72%73%73%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Jansenville

In Jansenville in December, the maximum UV index reaches an alarming 15, which falls into the extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take precautions. For detailed information, you can check the Hourly UV Index in Jansenville.

Maximum UV Index Levels in Jansenville for December

The chart shows the monthly maximum UV Index (UVI) for Jansenville 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 Jansenville typically reaches 15, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec1514128644610111315
Data source: Jansenville 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 Jansenville Compares to Other Months

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

This table compares monthly weather conditions in Jansenville, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather24°C (76°F)26 mm (1.0 inches)76%extreme
February Weather24°C (75°F)43 mm (1.7 inches)75%extreme
March Weather22°C (73°F)28 mm (1.1 inches)84%extreme
April Weather19°C (66°F)30 mm (1.2 inches)84%very high
May Weather16°C (62°F)13 mm (0.5 inches)83%high
June Weather14°C (58°F)3 mm (0.1 inches)79%moderate
July Weather13°C (56°F)8 mm (0.3 inches)77%moderate
August Weather14°C (57°F)9 mm (0.4 inches)68%high
September Weather17°C (62°F)20 mm (0.8 inches)77%very high
October Weather19°C (67°F)24 mm (1.0 inches)72%extreme
November Weather20°C (69°F)25 mm (1.0 inches)73%extreme
December Weather22°C (72°F)43 mm (1.7 inches)73%extreme

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