December weather forecast
Macnab, Swaziland

December, the gateway to the festive season, experiences the highest temperatures of the year in Macnab, oscillating between 17.5°C (63.5°F) and 27.5°C (81.5°F). The city sees the most rainfall, 110mm (4.33") over around 22.7 rainy days, reinforcing the onset of the wet season. Simultaneously, the daylight hours peak at 13.8, the longest for the year, enhanced by 8.7 hours of sunshine. December features an increased UV index of 6, making sunscreen a necessity for outdoor enthusiasts. Despite a high frequency of rainy days, the higher wind gust speed of 10.2km/h (6.3mph) ensures pleasant afternoons and evenings, rounding off the weather experience in December.

Temperature

In Macnab, Swaziland, December is the warmest month, with temperatures averaging a high of 27.5°C (81.5°F) and a low of 17.5°C (63.5°F).

Heat index

The heat index value during December is estimated at a tropical 31°C (87.8°F). Constant activity during exposure could result in a state of weariness and possibly heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Direct sunlight exposure may result in a rise of the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a metric representing the sensation of warmth when air temperature and moisture come together. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are particularly relevant to babies and toddlers. Young kids are often more at risk than adults as they tend to perspire less. Besides, their skin surface is larger relative to their small bodies, and their increased heat output from their active lifestyle compounds their risk.

Humidity

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

Rainfall

December is the month with the most rainfall. Rain falls for 22.7 days and accumulates 110mm (4.33") of precipitation.

Daylight

December has the longest days of the year in Macnab, with an average of 13h and 48min of daylight.
On the first day of the month, sunrise is at 04:52 and sunset at 18:33. On the last day of December, sunrise is at 05:03 and sunset at 18:49 SAST.

Sunshine

In Macnab, the average sunshine in December is 8.7h.

UV index

The months with the highest UV index are January through March, November and December, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for average individuals.
Note: In December, the maximum UV index of 6 transforms into these recommendations:
Eschew overexposure. Those with light skin may suffer burns in fewer than 20 minutes. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.