January weather forecast
Gravelotte, South Africa

January, the same as December, in Gravelotte, South Africa, is a hot summer month, with temperature in the range of an average low of 21.3°C (70.3°F) and an average high of 31.2°C (88.2°F).

Temperature

The start of January sees the average high-temperature at a still hot 31.2°C (88.2°F), showing little difference from December's 31.5°C (88.7°F). Gravelotte throughout January, records an average low-temperature of 21.3°C (70.3°F).

Heat index

The average heat index in January is computed to be a sweltering 38°C (100.4°F). Take more caution, heat exhaustion and heat cramps may occur. Long-lasting activity may cause heatstroke.
Evaluating the heat index requires understanding its values in the shade and with gentle winds. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. Direct sunlight exposure should be noted as it has the potential to increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for 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.
The innate cooling system of the human body revolves around perspiration, with the evaporation of sweat being central to this process. When relative humidity is at high levels, the evaporation rate lessens, causing the body to keep more heat than it would in less humid conditions. Overheating can ensue when the body accumulates more heat than it can release, and dehydration severity may vary.

Humidity

The most humid month is January, with an average relative humidity of 70%.

Rainfall

In January, the rain falls for 19.6 days. Throughout January, 93mm (3.66") of precipitation is accumulated. In Gravelotte, during the entire year, the rain falls for 130.3 days and collects up to 443mm (17.44") of precipitation.

Daylight

The average length of the day in January is 13h and 25min.
On the first day of the month, sunrise is at 05:13 and sunset at 18:48. On the last day of January, in Gravelotte, sunrise is at 05:34 and sunset at 18:46 SAST.

Sunshine

In Gravelotte, the average sunshine in January is 9.1h.

UV index

January and November, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the average person.
Note: A daily maximum UV index of 7 in January translates into the following instructions:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.