Country Overview For Indonesia
The climate in Indonesia is typically tropical; hot, humid; more moderate in highlands. The terrain: mostly coastal lowlands; larger islands have interior mountains. For Jakarta in January the daily average maximum temperatures is 31°C with the average minimum 24°C, while in June the average maximum is 32°C with a minimum of 24°C. The wettest month for Jakarta is January with an average of 98.2mm of precipitation falling while the driest month is September with 26.0mm falling.
HISTORICAL MONTHLY AVERAGES FOR JANUARY
The information presented below gives detailed historical monthly average weather conditions along with exceptional weather occurrences. To maintain relevance to current weather trends the displayed information has been calculated using data collected over the past two decades. The climate profile is taken from closest available data source to Sibolga.
Throughout the month of January daytime temperatures will generally reach highs of around 32°C that's about 89°F. At night the average minimum temperature drops down to around 22°C, that's 71°F.
In recent times the highest recorded temperature in January has been 39°C that's 102°F, with the lowest recorded temperature 17°C, about 63°F.
The average daily relative humidity for January is around 83%.
The Heat Index is a measure of how hot it feels when relative humidity is added to actual air temperature. From this a comfort level is calculated providing categories on how heat conditions might adversely affect someone.
Comfort Levels: Given average maximum temperatures and humidity levels you can expect dangerous heat conditions. Sunstroke, muscle cramps and heat exhaustion are likely. Heatstroke is possible with prolonged exposure and/or physical activity (see heat index for more information).
The average monthly amount of precipitation has been recorded at around 175 mm, that's 7 inches. Throughout the month you can expect to see rain or drizzle falling on 13 days of the month.
The average daily wind speed in January has been around 2 km/h, that’s the equivalent to about 1 mph, or 1 knots. In recent years the maximum sustained wind speed has reached 30 km/h, that’s the equivalent of around 18 mph, or 16 knots.
On average the month of January is affected by foggy conditions on less than 1 day.
YEARLY TRENDS: WEATHER AVERAGES & EXTREMES
The following charts show yearly weather trends with information on monthly weather averages and extremes.
The chart below plots the average high and low temperature for each month of the year. It also shows the maximum and minimum recorded temperatures.
The chart below plots the average monthly precipitation amount.
The chart below plots the average number of days in any month that you can expect to see rain falling.
The chart below plots the average daily wind speed you can expect for any month. It also shows the maximum recorded sustained wind speed for each month.