December Weather in Swellendam

Last updated: March 2, 2024

The weather in Swellendam, South Africa, during December is characterized by an average temperature of 20°C (69°F). Highs can soar to 36°C (96°F), while lows may dip to 10°C (51°F). Typically, the humidity level in Swellendam throughout December hovers around 79%.

10°C (51°F)

Minimum temperature

20°C (69°F)

Average temperature

36°C (96°F)

Maximum temperature

79%

Humidity

Precipitation and Sunshine hours

In December, Swellendam averages 25 mm (1.0 inches) of rainfall, typically over the course of 6 rainy days. The month enjoys an average of 14 hours 21 minutes of daylight, with the sun shining for approximately 13 hours 11 minutes each day. Additionally, there is a 36% probability of sunny days during this period.

25 mm (1.0 inches)

Precipitation

6 rainy days

Rainy days

13 hours 11 minutes

Sunshine hours

36%

Chance of sun

UV Index

In December, the UV Index in Swellendam reaches a maximum of 14, indicating a level of Extreme exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, during which unprotected skin may burn in as little as 10 minutes.

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
  07:00 08:00 09:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:00 19:00
UVI 2 3 6 10 13 14 14 12 9 6 3 1 1
Exposure Low Moderate High VeryHigh Extreme VeryHigh High Moderate Low
Time to burn 45 min 30 min 25 min 15 min 10 min 15 min 25 min 30 min 45 min

Compare Swellendam's Climate with Cities Worldwide