Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
January
Weather in January
Temperature
Piet Plessis signifies an average high-temperature of a still tropical 31°C (87.8°F) in January, closely mirroring the 31.3°C (88.3°F) of December. During January, the temperature is averaged to a low of 21°C (69.8°F) at night.Heat index
Throughout January, the heat index is computed to be a tropical 31°C (87.8°F). Ongoing exposure and activity could lead to a state of exhaustion, with a chance of heat cramps.Research indicates the heat index considers values in shaded locales and with light winds. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'real feel', represents the fusion of temperature and moisture in the air to suggest how warm it feels. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.
Humidity
In January, the average relative humidity is 42%.Rainfall
In Piet Plessis, South Africa, in January, during 9.9 rainfall days, 28mm (1.1") of precipitation is typically accumulated. Throughout the year, in Piet Plessis, there are 67.5 rainfall days, and 204mm (8.03") of precipitation is accumulated.Daylight
In January, the average length of the day is 13h and 34min.On the first day of January, sunrise is at 05:33 and sunset at 19:18. On the last day of the month, sunrise is at 05:56 and sunset at 19:15 SAST.
Sunshine
In January, the average sunshine is 11.8h.UV index
The months with the highest UV index are January, November and December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: The UV index of 7 during January leads to these advisories:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is January?
What is the average humidity in January?
How much does it rain in January?
What is the average length of the day in January?
When is the sunrise / sunset in January?
How many hours of sunshine does Piet Plessis have in January?
When is the highest UV index?
What is the UV index reading in January?
Average temperature in January
Piet Plessis, South Africa
- Average high temperature in January: 31°C
The warmest month (with the highest average high temperature) is December (31.3°C).
The months with the lowest average high temperature are June and July (18.4°C).
- Average low temperature in January: 21°C
The month with the highest average low temperature is January (21°C).
The coldest month (with the lowest average low temperature) is July (6.4°C).
Average pressure in January
Piet Plessis, South Africa
- Average pressure in January: 1010.9mbar
The month with the highest atmospheric pressure is July (1024.1mbar).
The month with the lowest atmospheric pressure is January (1010.9mbar).
Average wind speed in January
Piet Plessis, South Africa
- Average wind speed in January: 14.2km/h
The windiest month (with the highest average wind speed) is November (17.8km/h).
The calmest month (with the lowest average wind speed) is May (12.2km/h).
Average humidity in January
Piet Plessis, South Africa
- Average humidity in January: 42%
The months with the highest relative humidity are February and April (47%).
The month with the lowest relative humidity is September (25%).
Average rainfall in January
Piet Plessis, South Africa
- Average rainfall in January: 28mm
The wettest month (with the highest rainfall) is April (36mm).
The driest month (with the least rainfall) is July (1mm).
Average rainfall days in January
Piet Plessis, South Africa
- Average rainfall days in January: 9.9 days
The month with the highest number of rainy days is December (10.6 days).
The month with the least rainy days is July (0.9 days).
Average daylight in January /
Average sunshine in January
Piet Plessis, South Africa
- Average daylight in January: 13h and 4min
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 January: 11h and 5min
The month with the most sunshine is November (Average sunshine: 11h and 54min).
The month with the least sunshine is June (Average sunshine: 7h and 30min).
Average sunshine days in January
Piet Plessis, South Africa
- Average sunshine days in January: 17.8 days
The month with the most sunshine days is July (29.9 days).
The month with the least sunshine days is February (15.3 days).
Average UV index in January
Piet Plessis, South Africa
- Average UV index in January: 7
The months with the highest UV index are January, November and December (UV index 7).
The months with the lowest UV index are May, June and July (UV index 4).
Average cloud cover in January
Piet Plessis, South Africa
- Average cloud cover in January: 17
The month with the most cloud cover is February (Cloud cover 19).
The months with the least cloud cover are July and August (Cloud cover 5).
Average visibility in January
Piet Plessis, South Africa
- Average visibility in January: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
