Climate and monthly weather forecastSiantan, Indonesia
Climate and monthly weather forecast
Weather in January
January, like December, is another hot winter month in Siantan, Indonesia, with an average temperature varying between 23.7°C (74.7°F) and 30.6°C (87.1°F). January, characterized by an average high temperature of 30.6°C (87.1°F) and a low temperature of 23.7°C (74.7°F), is generally the coldest month. In January, the average heat index is calculated to be a blistering 41°C (105.8°F). Weather in January »Weather in February
The last month of the winter, February, is also a hot month in Siantan, Indonesia, with an average temperature varying between 23.3°C (73.9°F) and 31.2°C (88.2°F). The transition into February reveals an average high-temperature of a still tropical 31.2°C (88.2°F), mirroring a close resemblance to January. Weather in February »Weather in March
The first month of the spring, March, is also a hot month in Siantan, Indonesia, with temperature in the range of an average low of 23.7°C (74.7°F) and an average high of 31.4°C (88.5°F). The unfolding of March shows an average high-temperature of a still tropical 31.4°C (88.5°F), indicating a slight variance from February's 31.2°C (88.2°F). Weather in March »Weather in April
April, the same as March, in Siantan, Indonesia, is a hot spring month, with an average temperature ranging between max 31.8°C (89.2°F) and min 23.9°C (75°F). The transition from March to April brings an average high-temperature of a still hot 31.8°C (89.2°F), barely different from March's 31.4°C (88.5°F). Weather in April »Weather in May
The last month of the spring, May, is another tropical month in Siantan, Indonesia, with an average temperature fluctuating between 32.3°C (90.1°F) and 24.3°C (75.7°F). Siantan, Indonesia, experiences a transition to a still tropical 32.3°C (90.1°F) in average high-temperatures with the arrival of May, not greatly differing from April's 31.8°C (89.2°F). Weather in May »Weather in June
June, the first month of the summer in Siantan, is still a tropical month, with an average temperature ranging between max 32.3°C (90.1°F) and min 23.9°C (75°F). In June, a slight meteorological adjustment is experienced, with average high-temperatures matching those of the previous month. Weather in June »Weather in July
July, like June, is another hot summer month in Siantan, Indonesia, with an average temperature fluctuating between 23.5°C (74.3°F) and 32°C (89.6°F). With the onset of July, Siantan's average high-temperature clocks in at a still hot 32°C (89.6°F), showing a minor fluctuation from the previous month. Weather in July »Weather in August
August, the last month of the summer in Siantan, is also a hot month, with an average temperature ranging between max 32.5°C (90.5°F) and min 23.8°C (74.8°F). The average temperatures reach their apex in August, averaging 32.5°C (90.5°F) at the high end and 23.8°C (74.8°F) at the low end. The heat index value during August is calculated to be a blazing hot 46°C (114.8°F). Weather in August »Weather in September
September, the first month of the autumn in Siantan, is still a tropical month, with an average temperature ranging between max 32.3°C (90.1°F) and min 23.8°C (74.8°F). As Siantan welcomes September, the average high-temperature records at a still hot 32.3°C (90.1°F), marking an insignificant deviation from the prior month. Weather in September »Weather in October
October, like September, is another hot autumn month in Siantan, Indonesia, with an average temperature fluctuating between 24.3°C (75.7°F) and 31.8°C (89.2°F). The initiation of October records an average high-temperature of a still hot 31.8°C (89.2°F), displaying a near consistency with the previous month. Weather in October »Weather in November
The last month of the autumn, November, is another hot month in Siantan, Indonesia, with an average temperature varying between 24.2°C (75.6°F) and 31.2°C (88.2°F). Upon the beginning of November, Siantan's high-temperatures register at a still tropical 31.2°C (88.2°F), closely mirroring the preceding month. Weather in November »Weather in December
The first month of the winter, December, is also a hot month in Siantan, Indonesia, with an average temperature fluctuating between 24.1°C (75.4°F) and 30.7°C (87.3°F). With the start of December, Siantan measures an average high-temperature of a still tropical 30.7°C (87.3°F), not significantly differing from November's 31.2°C (88.2°F). Weather in December »Updated: Aug 25, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Siantan's temperature records reveal January as the coldest month, marked by average highs of 30.6°C (87.1°F) and lows of 23.7°C (74.7°F).
Throughout the year, there are 282.2 rainfall days, and 1495mm (58.86") of precipitation is accumulated.
January through December, with an average maximum UV index of 7, are months with the highest UV index.
January through December, with an average maximum UV index of 7, are months with the lowest UV index in Siantan.
With an average relative humidity of 85%, February is the most humid month.
The month with the most rainfall is February, when the rain falls for 23.3 days and typically aggregates up to 161mm (6.34") of precipitation.
The month with the longest days is June, with an average of 12h and 6min of daylight.
August brings the highest temperatures, with an average high of 32.5°C (90.5°F) and an average low of 23.8°C (74.8°F).
The month with the least rainfall is August, when the rain falls for 19.1 days and typically collects 74mm (2.91") of precipitation.
With an average relative humidity of 79%, September is the least humid month in Siantan.
The month with the most sunshine is September, with an average of 8.6h of sunshine.
October has the shortest days of the year, with an average of 12h and 6min of daylight.
Siantan does not observe Daylight Saving Time (DST). WIB timezone is used over the entire year.
The month with the least sunshine is December, with an average of 7h of sunshine.
Average temperature
Siantan, Indonesia
The warmest month (with the highest average high temperature) is August (32.5°C).
The month with the lowest average high temperature is January (30.6°C).
The months with the highest average low temperature are May and October (24.3°C).
The coldest month (with the lowest average low temperature) is February (23.3°C).
Average pressure
Siantan, Indonesia
- Average pressure in January:
1009.6mbar - Average pressure in February:
1009.9mbar - Average pressure in March:
1009.9mbar - Average pressure in April:
1009.4mbar - Average pressure in May:
1009mbar - Average pressure in June:
1009.2mbar
- Average pressure in July:
1009.3mbar - Average pressure in August:
1009.5mbar - Average pressure in September:
1009.8mbar - Average pressure in October:
1009.7mbar - Average pressure in November:
1008.9mbar - Average pressure in December:
1009mbar
The months with the highest atmospheric pressure are February and March (1009.9mbar).
The month with the lowest atmospheric pressure is November (1008.9mbar).
Average wind speed
Siantan, Indonesia
- Average wind speed in January:
6.3km/h - Average wind speed in February:
5.8km/h - Average wind speed in March:
4.9km/h - Average wind speed in April:
4.4km/h - Average wind speed in May:
4.5km/h - Average wind speed in June:
5.4km/h
- Average wind speed in July:
6.1km/h - Average wind speed in August:
6.2km/h - Average wind speed in September:
5.9km/h - Average wind speed in October:
4.7km/h - Average wind speed in November:
4.7km/h - Average wind speed in December:
5.4km/h
The windiest month (with the highest average wind speed) is January (6.3km/h).
The calmest month (with the lowest average wind speed) is April (4.4km/h).
Average humidity
Siantan, Indonesia
The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is September (79%).
Average rainfall
Siantan, Indonesia
- Average rainfall in January:
144mm - Average rainfall in February:
161mm - Average rainfall in March:
114mm - Average rainfall in April:
146mm - Average rainfall in May:
129mm - Average rainfall in June:
94mm
The wettest month (with the highest rainfall) is February (161mm).
The driest month (with the least rainfall) is August (74mm).
Average rainfall days
Siantan, Indonesia
- Average rainfall days in January:
25.8 days - Average rainfall days in February:
23.3 days - Average rainfall days in March:
26.3 days - Average rainfall days in April:
26.6 days - Average rainfall days in May:
26.3 days - Average rainfall days in June:
19.9 days
- Average rainfall days in July:
18.7 days - Average rainfall days in August:
19.1 days - Average rainfall days in September:
19.5 days - Average rainfall days in October:
25.6 days - Average rainfall days in November:
26.1 days - Average rainfall days in December:
25 days
The month with the highest number of rainy days is April (26.6 days).
The month with the least rainy days is July (18.7 days).
Average daylight / Average sunshine
Siantan, Indonesia
- Average daylight in January:
12h and 6min - Average daylight in February:
12h and 6min - Average daylight in March:
12h and 6min - Average daylight in April:
12h and 6min - Average daylight in May:
12h and 6min - Average daylight in June:
12h and 6min
- Average daylight in July:
12h and 6min - Average daylight in August:
12h and 6min - Average daylight in September:
12h and 6min - Average daylight in October:
12h and 6min - Average daylight in November:
12h and 6min - Average daylight in December:
12h and 6min
The month with the longest days is June (Average daylight: 12h and 6min).
The month with the shortest days is October (Average daylight: 12h and 6min).
- Average sunshine in January:
7h and 24min - Average sunshine in February:
7h and 30min - Average sunshine in March:
8h and 0min - Average sunshine in April:
7h and 48min - Average sunshine in May:
8h and 12min - Average sunshine in June:
8h and 24min
- Average sunshine in July:
8h and 24min - Average sunshine in August:
8h and 30min - Average sunshine in September:
8h and 36min - Average sunshine in October:
8h and 6min - Average sunshine in November:
7h and 24min - Average sunshine in December:
7h and 0min
The month with the most sunshine is September (Average sunshine: 8h and 36min).
The month with the least sunshine is December (Average sunshine: 7h and 0min).
Average sunshine days
Siantan, Indonesia
- Average sunshine days in January:
4.1 days - Average sunshine days in February:
3.8 days - Average sunshine days in March:
3.7 days - Average sunshine days in April:
2.3 days - Average sunshine days in May:
3.5 days - Average sunshine days in June:
7.8 days
- Average sunshine days in July:
10.2 days - Average sunshine days in August:
10.2 days - Average sunshine days in September:
8.8 days - Average sunshine days in October:
4.1 days - Average sunshine days in November:
3.3 days - Average sunshine days in December:
5.2 days
The months with the most sunshine days are July and August (10.2 days).
The month with the least sunshine days is April (2.3 days).
Average UV index
Siantan, Indonesia
The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
Average cloud cover
Siantan, Indonesia
The month with the most cloud cover is December (Cloud cover 52).
The months with the least cloud cover are August and September (Cloud cover 37).
Average visibility
Siantan, Indonesia
The months with the highest visibility are May, June, July, August, September, October and November (9km).
The months with the lowest visibility are January, February, March, April and December (8km).
