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
Weather in January
Temperature
With average temperatures fluctuating between a high of 28.8°C (83.8°F) and a low of 16.8°C (62.2°F), January stands out as the warmest month.Heat index
The heat index value during January is computed to be a tropical 30°C (86°F). Prolonged exposure combined with continuous activity could lead to exhaustion, and possibly heat cramps.Understand that the heat index values take into account shaded locations and mild winds. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', ties air temperature with relative humidity to produce the perceived temperature sensation. Elements of metabolic variation, physical activity, and clothing contribute to the effect of temperature on an individual. Consider the fact that direct sun exposure can influence how hot one feels, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Children often overlook the necessity for resting and fluid replenishment. Thirst is a late sign of dehydration - thus, it is critical to stay hydrated, especially during extended periods of physical activities.
Humidity
In Heilbron, the average relative humidity in January is 58%.Rainfall
In Heilbron, during January, the rain falls for 10.8 days and regularly aggregates up to 36mm (1.42") of precipitation. Throughout the year, there are 76.4 rainfall days, and 266mm (10.47") of precipitation is accumulated.Daylight
In January, the average length of the day is 13h and 38min.On the first day of January, sunrise is at 05:16 and sunset at 19:06. On the last day of the month, sunrise is at 05:39 and sunset at 19:02 SAST.
Sunshine
In January, the average sunshine is 11.5h.UV index
The months with the highest UV index are January, February, October through December, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: In January, the maximum UV index of 6 transforms into these recommendations:
Adopt measures and apply sun safety strategies. Shielding from skin and eye damage is necessary. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the warmest months?
How hot is January?
What is the average humidity in January in Heilbron?
How many days does it rain in January?
How many hours of daylight does Heilbron have in January?
When is the sunrise / sunset in January?
How long on average sun shines in January?
What is the month with the highest UV index?
What is the UV index reading in January?
Average temperature in January
Heilbron, South Africa
- Average high temperature in January: 28.8°C
The warmest month (with the highest average high temperature) is January (28.8°C).
The months with the lowest average high temperature are June and July (17.8°C).
- Average low temperature in January: 16.8°C
The months with the highest average low temperature are January and December (16.8°C).
The coldest month (with the lowest average low temperature) is July (5.1°C).
Average pressure in January
Heilbron, South Africa
- Average pressure in January: 1013mbar
The month with the highest atmospheric pressure is July (1024.8mbar).
The month with the lowest atmospheric pressure is January (1013mbar).
Average wind speed in January
Heilbron, South Africa
- Average wind speed in January: 11km/h
The windiest month (with the highest average wind speed) is November (13.7km/h).
The calmest month (with the lowest average wind speed) is May (8.7km/h).
Average humidity in January
Heilbron, South Africa
- Average humidity in January: 58%
The month with the highest relative humidity is February (60%).
The month with the lowest relative humidity is September (30%).
Average rainfall in January
Heilbron, South Africa
- Average rainfall in January: 36mm
The wettest month (with the highest rainfall) is December (57mm).
The driest months (with the least rainfall) are July and August (2mm).
Average rainfall days in January
Heilbron, South Africa
- Average rainfall days in January: 10.8 days
The month with the highest number of rainy days is December (12.5 days).
The month with the least rainy days is August (1 days).
Average daylight in January /
Average sunshine in January
Heilbron, South Africa
- Average daylight in January: 13h and 4min
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 24min).
- Average sunshine in January: 11h and 3min
The month with the most sunshine is October (Average sunshine: 11h and 48min).
The month with the least sunshine is August (Average sunshine: 7h and 24min).
Average sunshine days in January
Heilbron, South Africa
- Average sunshine days in January: 18.4 days
The month with the most sunshine days is August (29.6 days).
The month with the least sunshine days is December (16.9 days).
Average UV index in January
Heilbron, South Africa
- Average UV index in January: 6
The months with the highest UV index are January, February, October, November and December (UV index 6).
The months with the lowest UV index are May, June and July (UV index 4).
Average cloud cover in January
Heilbron, South Africa
- Average cloud cover in January: 22
The month with the most cloud cover is January (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in January
Heilbron, 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).
Heilbron, South Africa
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