December weather forecast
Ambarawa, Indonesia

December, the first month of the summer in Ambarawa, is still a warm month, with an average temperature varying between 25.5°C (77.9°F) and 29.6°C (85.3°F).

Temperature

As Ambarawa welcomes December, the average high-temperature records at a warm 29.6°C (85.3°F), marking an insignificant deviation from the prior month. Ambarawa registers a gentle descent to an average nighttime low of 25.5°C (77.9°F) in December from its daytime highs.

Heat index

For December, the heat index is evaluated at a fiery hot 35°C (95°F). Implement more preventive measures, heat cramps and heat exhaustion are probable. Heatstroke might result from extended activity.
Research indicates the heat index considers values in shaded locales and with light winds. Under direct sunshine, the heat index values might be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', is a value derived by merging air temperature with the humidity to convey how the climate feels. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. Taking into account that direct sunlight can boost the heat effect, the heat index may rise by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
Humans rely on perspiration as a cooling mechanism, wherein the evaporating sweat counteracts excessive warmth. In the presence of abundant moisture in the atmosphere, the cooling process through evaporation is hindered, causing the body to feel excessively warm. As the body gains more heat than it can dissipate, there's a risk of increasing temperatures and resultant overheating.

Humidity

In December, the average relative humidity in Ambarawa, Indonesia, is 75%.

Rainfall

In Ambarawa, during December, the rain falls for 24.8 days and regularly aggregates up to 139mm (5.47") of precipitation. Throughout the year, there are 239.5 rainfall days, and 1058mm (41.65") of precipitation is accumulated.

Daylight

December has the longest days of the year, with an average of 12h and 30min of daylight.
On the first day of December, sunrise is at 05:12 and sunset at 17:42. On the last day of the month, sunrise is at 05:25 and sunset at 17:57 WIB.

Sunshine

With an average of 8.1h of sunshine, December has the least sunshine of the year.

UV index

The months with the highest UV index in Ambarawa are February through December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: The daily high UV index of 7 during December translates into the following recommendations:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.