December weather forecastHerefords, Swaziland
December
Weather in December
December marks the onset of the peak summer months in Herefords, Swaziland. The weather characteristics for this festive month include high temperatures, high humidity levels, and increased rainfall. An average rainfall of 94mm (3.7") echoes the prevalent wet conditions. Wind speed declines slightly, leading to relatively calm weather conditions. Looking ahead, January is likely to continue with similar high temperature trends, although with a possible slight drop in rainfall.Temperature
In Herefords, the month of December registers the highest temperatures, averaging 29.1°C (84.4°F) at the peak and 18.8°C (65.8°F) at the lowest.Heat index
For December, the heat index is evaluated at a tropical 34°C (93.2°F). Adopt enhanced safety measures, heat exhaustion and heat cramps could occur. Continuous activity may induce heatstroke.When referencing the heat index, its values are suitable for shady environments and light breezes. Heat index values may surge by up to 15 Fahrenheit (8 Celsius) degrees in the presence of direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'real feel', measures the perceived warmth when incorporating the humidity present in the air. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Kids are usually more vulnerable than adults, given their lesser sweating ability. Along with their larger skin surface relative to their small stature and the excess heat due to their activity, their risk is amplified.
Humidity
The average relative humidity in December is 76%.Rainfall
The month with the most rainfall is December, when the rain falls for 20.5 days and typically aggregates up to 94mm (3.7") of precipitation.Daylight
With an average of 13h and 42min of daylight, December has the longest days of the year.On the first day of December, sunrise is at 04:54 and sunset at 18:32. On the last day of the month, sunrise is at 05:05 and sunset at 18:49 SAST.
Sunshine
In Herefords, the average sunshine in December is 8.7h.UV index
January through March, September through December, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for average individuals.Note: A daily high UV index of 6 in December leads to these guidelines:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Herefords, Swaziland
- Average high temperature in December: 29.1°C
The warmest month (with the highest average high temperature) is December (29.1°C).
The month with the lowest average high temperature is July (23°C).
- Average low temperature in December: 18.8°C
The months with the highest average low temperature are January and February (19°C).
The coldest month (with the lowest average low temperature) is June (10.6°C).
Average pressure in December
Herefords, Swaziland
- Average pressure in December: 1014.1mbar
The month with the highest atmospheric pressure is July (1024.1mbar).
The month with the lowest atmospheric pressure is January (1013.7mbar).
Average wind speed in December
Herefords, Swaziland
- Average wind speed in December: 7.1km/h
The windiest month (with the highest average wind speed) is September (8.5km/h).
The calmest months (with the lowest average wind speed) are March and May (6.4km/h).
Average humidity in December
Herefords, Swaziland
- Average humidity in December: 76%
The months with the highest relative humidity are January, February and March (78%).
The months with the lowest relative humidity are August and September (56%).
Average rainfall in December
Herefords, Swaziland
- Average rainfall in December: 94mm
The wettest month (with the highest rainfall) is December (94mm).
The driest month (with the least rainfall) is July (2mm).
Average rainfall days in December
Herefords, Swaziland
- Average rainfall days in December: 20.5 days
The month with the highest number of rainy days is December (20.5 days).
The month with the least rainy days is June (1.8 days).
Average daylight in December /
Average sunshine in December
Herefords, Swaziland
- Average daylight in December: 13h and 42min
The month with the longest days is December (Average daylight: 13h and 42min).
The month with the shortest days is June (Average daylight: 10h and 30min).
- Average sunshine in December: 8h and 42min
The month with the most sunshine is February (Average sunshine: 9h and 18min).
The month with the least sunshine is April (Average sunshine: 6h and 24min).
Average sunshine days in December
Herefords, Swaziland
- Average sunshine days in December: 7.5 days
The month with the most sunshine days is June (27.3 days).
The month with the least sunshine days is December (7.5 days).
Average UV index in December
Herefords, Swaziland
- Average UV index in December: 6
The months with the highest UV index are January, February, March, September, October, November and December (UV index 6).
The months with the lowest UV index are April, May, June, July and August (UV index 5).
Average cloud cover in December
Herefords, Swaziland
- Average cloud cover in December: 49
The month with the most cloud cover is January (Cloud cover 54).
The month with the least cloud cover is June (Cloud cover 13).
Average visibility in December
Herefords, Swaziland
- Average visibility in December: 8km
The months with the highest visibility are June, July, August and September (10km).
The months with the lowest visibility are January, February, March and December (8km).
