Climate and monthly weather forecastDumai, Indonesia
Climate and monthly weather forecast
Weather in January
January, like December, is another hot winter month in Dumai, Indonesia, with temperature in the range of an average high of 30.6°C (87.1°F) and an average low of 23.8°C (74.8°F). Dumai experiences the lowest of its temperatures in January and December, when the average high-temperatures rise to 30.6°C (87.1°F). January's heat index is calculated to be an extremely hot 40°C (104°F). Weather in January »Weather in February
The last month of the winter, February, is another hot month in Dumai, Indonesia, with an average temperature ranging between min 23.9°C (75°F) and max 31.5°C (88.7°F). Dumai observes an average high-temperature of a still tropical 31.5°C (88.7°F) in February, barely different from 30.6°C (87.1°F) in January. Weather in February »Weather in March
The first month of the spring, March, is also a hot month in Dumai, Indonesia, with an average temperature varying between 24.3°C (75.7°F) and 32°C (89.6°F). Dumai signifies an average high-temperature of a still hot 32°C (89.6°F) in March, closely mirroring the 31.5°C (88.7°F) of February. Weather in March »Weather in April
April, the same as March, in Dumai, Indonesia, is a hot spring month, with an average temperature varying between 24.6°C (76.3°F) and 32.2°C (90°F). Entering April, Dumai's average high-temperature reads a still tropical 32.2°C (90°F), indicating a close resemblance to the previous month's climate. Weather in April »Weather in May
May, the last month of the spring in Dumai, is also a hot month, with an average temperature ranging between min 24.7°C (76.5°F) and max 32.5°C (90.5°F). May experiences an average high-temperature of a still hot 32.5°C (90.5°F), barely different from April's 32.2°C (90°F). Weather in May »Weather in June
The first month of the summer, June, is still a hot month in Dumai, Indonesia, with an average temperature varying between 24.4°C (75.9°F) and 32.8°C (91°F). Dumai's June weather, marked by an average high temperature of 32.8°C (91°F) and an average low temperature of 24.4°C (75.9°F), is the warmest in the year. June's average heat index is calculated to be a life-threatening hot 47°C (116.6°F). Weather in June »Weather in July
July, like June, is another hot summer month in Dumai, Indonesia, with an average temperature ranging between min 24.3°C (75.7°F) and max 32.5°C (90.5°F). Dumai sees the arrival of July with an average high-temperature of a still hot 32.5°C (90.5°F), indicating a subtle variation from June. Weather in July »Weather in August
The last month of the summer, August, is also a hot month in Dumai, Indonesia, with temperature in the range of an average high of 32.4°C (90.3°F) and an average low of 24.1°C (75.4°F). August ushers in an average high-temperature of a still tropical 32.4°C (90.3°F), aligning closely with the preceding month. Weather in August »Weather in September
The first month of the autumn, September, is still a tropical month in Dumai, Indonesia, with temperature in the range of an average high of 32.2°C (90°F) and an average low of 24°C (75.2°F). The onset of September notes an average high-temperature of a still hot 32.2°C (90°F), subtly shifted from August's 32.4°C (90.3°F). Weather in September »Weather in October
October, the same as September, in Dumai, Indonesia, is another hot autumn month, with an average temperature ranging between min 24.2°C (75.6°F) and max 32.1°C (89.8°F). October's average high-temperature stands at a still tropical 32.1°C (89.8°F), showing little deviation from September's 32.2°C (90°F). Weather in October »Weather in November
November, the last month of the autumn in Dumai, is another hot month, with an average temperature varying between 31.2°C (88.2°F) and 24.2°C (75.6°F). As Dumai steps into November, the average high-temperature holds at a still tropical 31.2°C (88.2°F), hinting at a minor fluctuation from the prior month. Weather in November »Weather in December
The first month of the winter, December, is still a hot month in Dumai, Indonesia, with an average temperature varying between 30.6°C (87.1°F) and 23.7°C (74.7°F). In Dumai, the coldest period comes during January and December, when the average high-temperature touches 30.6°C (87.1°F). For most parts of December, the heat index is calculated to be an extremely hot 41°C (105.8°F). Weather in December »Updated: Jun 11, 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
Dumai experiences its coldest period in January and December, averaging a high-temperature of 30.6°C (87.1°F).
Throughout the year, in Dumai, there are 286.4 rainfall days, and 1200mm (47.24") of precipitation is accumulated.
With an average sea temperature of 28.4°C (83.1°F), January is the month with the coldest seawater.
January through September and November, with an average maximum UV index of 7, are months with the highest UV index.
With an average relative humidity of 78%, February is the least humid month.
February is the month with the least rainfall. Rain falls for 18.7 days and accumulates 52mm (2.05") of precipitation.
The months with the warmest seawater are May and June, with an average sea temperature of 30.2°C (86.4°F).
Dumai's warmest month, June, registers temperatures that range from a high of 32.8°C (91°F) to a low of 24.4°C (75.9°F).
June has the longest days of the year, with an average of 12h and 12min of daylight.
October is the month with the most rainfall. Rain falls for 25.5 days and accumulates 142mm (5.59") of precipitation.
The month with the most sunshine is October, with an average of 8.8h of sunshine.
The months with the lowest UV index are October and December, with an average maximum UV index of 6.
November and December, with an average relative humidity of 83%, are most humid months.
With an average of 12h and 0min of daylight, December has the shortest days of the year.
Dumai, Indonesia, does not utilize Daylight Saving Time (DST). WIB timezone is used over the entire year.
December has the least sunshine of the year, with an average of 7h of sunshine.
Average temperature
Dumai, Indonesia
The warmest month (with the highest average high temperature) is June (32.8°C).
The months with the lowest average high temperature are January and December (30.6°C).
The month with the highest average low temperature is May (24.7°C).
The coldest month (with the lowest average low temperature) is December (23.7°C).
Average pressure
Dumai, Indonesia
- Average pressure in January:
1010.3mbar - Average pressure in February:
1010.3mbar - Average pressure in March:
1010mbar - Average pressure in April:
1009.3mbar - Average pressure in May:
1008.8mbar - Average pressure in June:
1009mbar
- Average pressure in July:
1009.1mbar - Average pressure in August:
1009.3mbar - Average pressure in September:
1009.8mbar - Average pressure in October:
1009.7mbar - Average pressure in November:
1009mbar - Average pressure in December:
1009.5mbar
The months with the highest atmospheric pressure are January and February (1010.3mbar).
The month with the lowest atmospheric pressure is May (1008.8mbar).
Average wind speed
Dumai, Indonesia
- Average wind speed in January:
5.5km/h - Average wind speed in February:
5.8km/h - Average wind speed in March:
5km/h - Average wind speed in April:
4.5km/h - Average wind speed in May:
4.6km/h - Average wind speed in June:
5km/h
- Average wind speed in July:
5.2km/h - Average wind speed in August:
5.1km/h - Average wind speed in September:
4.8km/h - Average wind speed in October:
4.8km/h - Average wind speed in November:
4.8km/h - Average wind speed in December:
5km/h
The windiest month (with the highest average wind speed) is February (5.8km/h).
The calmest month (with the lowest average wind speed) is April (4.5km/h).
Average humidity
Dumai, Indonesia
The months with the highest relative humidity are November and December (83%).
The month with the lowest relative humidity is February (78%).
Average rainfall
Dumai, Indonesia
- Average rainfall in January:
85mm - Average rainfall in February:
52mm - Average rainfall in March:
93mm - Average rainfall in April:
112mm - Average rainfall in May:
119mm - Average rainfall in June:
83mm
The wettest month (with the highest rainfall) is October (142mm).
The driest month (with the least rainfall) is February (52mm).
Average rainfall days
Dumai, Indonesia
- Average rainfall days in January:
22.3 days - Average rainfall days in February:
18.7 days - Average rainfall days in March:
24.9 days - Average rainfall days in April:
25.6 days - Average rainfall days in May:
25.9 days - Average rainfall days in June:
20.9 days
- Average rainfall days in July:
22.7 days - Average rainfall days in August:
24.8 days - Average rainfall days in September:
24.6 days - Average rainfall days in October:
25.5 days - Average rainfall days in November:
26.4 days - Average rainfall days in December:
24.1 days
The month with the highest number of rainy days is November (26.4 days).
The month with the least rainy days is February (18.7 days).
Average sea temperature
Dumai, Indonesia
The best months for swimming (with the highest average sea temperature) are May and June (30.2°C).
The coldest month (with the lowest average sea temperature) is January (28.4°C).
Average daylight / Average sunshine
Dumai, Indonesia
- Average daylight in January:
12h and 0min - Average daylight in February:
12h and 6min - Average daylight in March:
12h and 6min - Average daylight in April:
12h and 12min - Average daylight in May:
12h and 12min - Average daylight in June:
12h and 12min
- Average daylight in July:
12h and 12min - Average daylight in August:
12h and 12min - Average daylight in September:
12h and 6min - Average daylight in October:
12h and 6min - Average daylight in November:
12h and 0min - Average daylight in December:
12h and 0min
The month with the longest days is June (Average daylight: 12h and 12min).
The month with the shortest days is December (Average daylight: 12h and 0min).
- Average sunshine in January:
7h and 42min - Average sunshine in February:
8h and 30min - Average sunshine in March:
8h and 24min - Average sunshine in April:
8h and 12min - Average sunshine in May:
8h and 18min - Average sunshine in June:
8h and 24min
- Average sunshine in July:
8h and 24min - Average sunshine in August:
8h and 24min - Average sunshine in September:
8h and 30min - Average sunshine in October:
8h and 48min - Average sunshine in November:
7h and 12min - Average sunshine in December:
7h and 0min
The month with the most sunshine is October (Average sunshine: 8h and 48min).
The month with the least sunshine is December (Average sunshine: 7h and 0min).
Average sunshine days
Dumai, Indonesia
- Average sunshine days in January:
6.2 days - Average sunshine days in February:
6.6 days - Average sunshine days in March:
4.4 days - Average sunshine days in April:
3.3 days - Average sunshine days in May:
3.9 days - Average sunshine days in June:
7.2 days
- Average sunshine days in July:
5.8 days - Average sunshine days in August:
4.6 days - Average sunshine days in September:
4.3 days - Average sunshine days in October:
4 days - Average sunshine days in November:
3 days - Average sunshine days in December:
5.6 days
The month with the most sunshine days is June (7.2 days).
The month with the least sunshine days is November (3 days).
Average UV index
Dumai, Indonesia
The months with the highest UV index are January, February, March, April, May, June, July, August, September and November (UV index 7).
The months with the lowest UV index are October and December (UV index 6).
Average cloud cover
Dumai, Indonesia
The month with the most cloud cover is November (Cloud cover 54).
The months with the least cloud cover are February and June (Cloud cover 39).
Average visibility
Dumai, Indonesia
The months with the highest visibility are January, February, March, April, May, June, July, August, September and October (9km).
The months with the lowest visibility are November and December (8km).
