December weather forecast
Sicunusa, Swaziland

December

Weather in December

December’s arrival welcomes the height of summer in Sicunusa. High temperatures get partnered with frequent showers, creating a unique blend of tropical weather. A notable factor of December's weather is the total daylight that peaks at 13.8 hours for the year, making it the longest day month. Rain showers remain heavy, with high humidity levels providing Sicunusa with its distinctive summery feel. As Sicunusa bid farewell to the year, December's weather remains a clear indication of the searing heat and rainfall that January will usher in the following year.

Temperature

In Sicunusa, the month of December registers the highest temperatures, averaging 26.3°C (79.3°F) at the peak and 15.2°C (59.4°F) at the lowest.

Humidity

In Sicunusa, the average relative humidity in December is 79%.

Rainfall

In Sicunusa, in December, during 21.3 rainfall days, 102mm (4.02") of precipitation is typically accumulated. In Sicunusa, during the entire year, the rain falls for 145.6 days and collects up to 538mm (21.18") of precipitation.

Daylight

December has the longest days of the year, with an average of 13h and 48min of daylight.
On the first day of the month, sunrise is at 04:54 and sunset at 18:36. On the last day of December, sunrise is at 05:05 and sunset at 18:53 SAST.

Sunshine

In December, the average sunshine is 9h.

UV index

The average daily maximum UV index in December is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for average individuals.
Note: The daily high UV index of 5 in December translates into this advice:
Exercise prevention - Warding off sunburn is urged. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.

Frequently asked questions

What are the warmest months?
In Sicunusa, December records the average highest temperatures, peaking at 26.3°C (79.3°F) and reaching a low of 15.2°C (59.4°F).
What is the temperature in December?
The average high-temperature and low-temperature during December are 26.3°C (79.3°F) and 15.2°C (59.4°F) respectively.
What is the average humidity in December?
In Sicunusa, the average relative humidity in December is 79%.
How many days does it rain in December?
In Sicunusa, in December, it is raining for 21.3 days, with typically 102mm (4.02") of accumulated precipitation.
When are the longest days?
December has the longest days of the year, with an average of 13h and 48min of daylight.
What is the average length of the day in December?
In December, the average day length is 13h and 48min.
What time are sunrise and sunset in December?
On the first day of December, sunrise is at 04:54 and sunset at 18:36. On the last day of the month, sunrise is at 05:05 and sunset at 18:53 SAST.
How many hours of sunshine does Sicunusa have in December?
In Sicunusa, the average sunshine duration in December is 9h.
How high is the UV index in December?
The average daily maximum UV index in December is 5. A UV Index reading of 3 to 5 represents a medium hazard to health from exposure to Sun's UV rays.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility
Average temperature in December - Sicunusa, Swaziland
Average temperature in December
Sicunusa, Swaziland
  • Average high temperature in December: 26.3°C

The warmest month (with the highest average high temperature) is December (26.3°C).
The month with the lowest average high temperature is July (19.4°C).

  • Average low temperature in December: 15.2°C

The months with the highest average low temperature are January and December (15.2°C).
The coldest month (with the lowest average low temperature) is July (5.6°C).

Average pressure in December - Sicunusa, Swaziland
Average pressure in December
Sicunusa, Swaziland
  • Average pressure in December: 1014.4mbar

The month with the highest atmospheric pressure is July (1024.3mbar).
The months with the lowest atmospheric pressure are January and December (1014.4mbar).

Average wind speed in December - Sicunusa, Swaziland
Average wind speed in December
Sicunusa, Swaziland
  • Average wind speed in December: 7.7km/h

The windiest months (with the highest average wind speed) are June and September (9.4km/h).
The calmest month (with the lowest average wind speed) is March (6.7km/h).

Average humidity in December - Sicunusa, Swaziland
Average humidity in December
Sicunusa, Swaziland
  • Average humidity in December: 79%

The months with the highest relative humidity are January, February and March (82%).
The month with the lowest relative humidity is August (54%).

Average rainfall in December - Sicunusa, Swaziland
Average rainfall in December
Sicunusa, Swaziland
  • Average rainfall in December: 102mm

The wettest month (with the highest rainfall) is January (105mm).
The driest month (with the least rainfall) is July (3mm).

Average rainfall days in December - Sicunusa, Swaziland
Average rainfall days in December
Sicunusa, Swaziland
  • Average rainfall days in December: 21.3 days

The month with the highest number of rainy days is January (23 days).
The month with the least rainy days is June (2.6 days).

Average daylight in December / Average sunshine in December - Sicunusa, Swaziland
Average daylight in December /
Average sunshine in December
Sicunusa, Swaziland
  • Average daylight in December: 13h and 5min

The month with the longest days is December (Average daylight: 13h and 48min).
The month with the shortest days is June (Average daylight: 10h and 30min).

  • Average sunshine in December: 9h and 0min

The month with the most sunshine is October (Average sunshine: 9h and 30min).
The month with the least sunshine is April (Average sunshine: 6h and 36min).

Average sunshine days in December - Sicunusa, Swaziland
Average sunshine days in December
Sicunusa, Swaziland
  • Average sunshine days in December: 7.5 days

The month with the most sunshine days is July (27.3 days).
The month with the least sunshine days is January (5 days).

Average UV index in December - Sicunusa, Swaziland
Average UV index in December
Sicunusa, Swaziland
  • Average UV index in December: 5

The month with the highest UV index is November (UV index 6).
The months with the lowest UV index are April, May, June and July (UV index 4).

Average cloud cover in December - Sicunusa, Swaziland
Average cloud cover in December
Sicunusa, Swaziland
  • Average cloud cover in December: 51

The month with the most cloud cover is January (Cloud cover 57).
The months with the least cloud cover are June and July (Cloud cover 14).

Average visibility in December - Sicunusa, Swaziland
Average visibility in December
Sicunusa, Swaziland
  • Average visibility in December: 7km

The month with the highest visibility is June (10km).
The months with the lowest visibility are January, February, March and December (7km).

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