January weather forecast
Batu, Indonesia

January, like December, in Batu, Indonesia, is a moderately hot summer month, with temperature in the range of an average high of 29.6°C (85.3°F) and an average low of 23°C (73.4°F).

Temperature

Batu's January weather, with an average high temperature of 29.6°C (85.3°F) and an average low temperature of 23°C (73.4°F), tends to be the coldest of the year.

Heat index

For January, the heat index is appraised at a sweltering 38°C (100.4°F). Special measures are necessary to avoid heat cramps and heat exhaustion. Persistent activity could result in heatstroke.
When considering the heat index, it's pivotal to note it is for shade and mild wind conditions. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is a single figure representing how weather conditions feel when combining temperature and humidity. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children usually face more risks than adults as their ability to sweat is less. Additionally, their larger skin surface in relation to their petite bodies and higher heat output due to their activities increases their vulnerability.
Perspiration, which is the evaporation of sweat, is a primary way the human body manages and dispels excessive warmth. With higher relative humidity, the rate of evaporation is reduced, resulting in increased heat retention in the body compared to drier air. Heat-related challenges, like dehydration, can be anticipated when body heat isn't managed effectively.

Humidity

The average relative humidity in January in Batu is 84%.

Rainfall

In Batu, Indonesia, in January, it is raining for 25.7 days, with typically 139mm (5.47") of accumulated precipitation. In Batu, during the entire year, the rain falls for 223 days and collects up to 1083mm (42.64") of precipitation.

Daylight

In January, the average length of the day in Batu, Indonesia, is 12h and 31min.
On the first day of the month, sunrise is at 05:15 and sunset at 17:50. On the last day of January, sunrise is at 05:29 and sunset at 17:56 WIB.

Sunshine

January has the least sunshine of the year, with an average of 6.7h of sunshine.

UV index

The months with the lowest UV index are January through March and May, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: The maximum daily UV index of 6 in January converts into the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.