Monthly climate in Dumai, Riau, Indonesia

Last updated: March 2, 2024

Under the Köppen–Geiger climate classification Dumai features a tropical rainforest climate (Af). Temperatures typically range between 27 °C (81 °F) and 28 °C (83 °F) through the year, but rarely can drop to 20 °C (69 °F) or can rise to as high as 37 °C (98 °F). The average annual precipitation amounts to about 2712 mm (106.8 inches) and receives 282 rainy days on the 1 mm (0.04 inches) threshold annually. Dumai enjoys an average of 3417 hours of sunshine throughout the year, and daylight varies from 12 hours 1 minutes to 12 hours 12 minutes per day.

Monthly average temperatures in Dumai, Riau, Indonesia §

The warmest months in Dumai are March, April and May, with daily mean temperatures ranging from 28 to 28 °C (83 - 83 °F) throughout the day. The coldest temperatures usually occur in January, November and December, when daily mean temperatures range from 27 to 27 °C (81 - 82 °F) throughout the day. On average each year, Dumai experiences 329 days above 25 °C (77.0 °F) and 0 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Dumai, Riau, Indonesia. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 35°C
(95°F)
34°C
(94°F)
37°C
(98°F)
35°C
(95°F)
35°C
(96°F)
35°C
(95°F)
34°C
(94°F)
35°C
(95°F)
34°C
(94°F)
35°C
(95°F)
35°C
(94°F)
34°C
(94°F)
Mean maximum 33°C
(92°F)
34°C
(93°F)
35°C
(95°F)
34°C
(94°F)
35°C
(95°F)
34°C
(94°F)
34°C
(93°F)
34°C
(94°F)
34°C
(94°F)
34°C
(94°F)
34°C
(93°F)
33°C
(92°F)
Average high 31°C
(88°F)
32°C
(90°F)
32°C
(91°F)
32°C
(91°F)
32°C
(91°F)
32°C
(90°F)
32°C
(90°F)
32°C
(90°F)
32°C
(89°F)
32°C
(90°F)
31°C
(89°F)
31°C
(88°F)
Daily mean 27°C
(82°F)
28°C
(82°F)
28°C
(83°F)
28°C
(83°F)
28°C
(83°F)
28°C
(83°F)
28°C
(82°F)
28°C
(82°F)
27°C
(82°F)
28°C
(82°F)
27°C
(81°F)
27°C
(82°F)
Average low 25°C
(77°F)
25°C
(77°F)
25°C
(77°F)
25°C
(78°F)
26°C
(78°F)
25°C
(78°F)
25°C
(77°F)
25°C
(77°F)
25°C
(77°F)
25°C
(77°F)
25°C
(77°F)
25°C
(77°F)
Mean minimum 23°C
(74°F)
24°C
(75°F)
24°C
(75°F)
24°C
(76°F)
24°C
(76°F)
24°C
(75°F)
23°C
(74°F)
23°C
(74°F)
23°C
(74°F)
23°C
(74°F)
24°C
(75°F)
24°C
(75°F)
Minimum 20°C
(69°F)
24°C
(75°F)
23°C
(74°F)
24°C
(75°F)
24°C
(75°F)
23°C
(74°F)
22°C
(72°F)
23°C
(73°F)
23°C
(73°F)
23°C
(74°F)
23°C
(74°F)
23°C
(74°F)

Compare climate in Dumai with other places

Compare temperature, precipitation, sunshine, UV index in Dumai, Riau, Indonesia with other places around the world.

Monthly average precipitation in Dumai, Riau, Indonesia §

Dumai usually has the most precipitation in October, November and December, with an average of 27 rainy days and 321 mm (12.6 inches) of precipitation per month. The driest months in Dumai are February, June and July. On average, 131 mm (5.2 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Dumai, Riau, Indonesia. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 184 (7.3) 95 (3.7) 226 (8.9) 257 (10.1) 252 (9.9) 153 (6.0) 145 (5.7) 173 (6.8) 264 (10.4) 285 (11.2) 381 (15.0) 295 (11.6)
Average precipitation days (≥ 1 mm) 20 15 25 27 27 21 19 21 25 25 29 28

Monthly sunshine hours in Dumai, Riau, Indonesia §

The sunniest months in Dumai are March, July and August, when the sun shines an average of 9 hours 58 minutes a day. Least sunny months in Dumai: January, November and December receive an average of 8 hours 12 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Dumai, Riau, Indonesia. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 233 299 315 281 293 289 306 305 288 283 245 275
Mean daily daylight hours 12h 1m 12h 2m 12h 5m 12h 8m 12h 10m 12h 12m 12h 11m 12h 9m 12h 6m 12h 3m 12h 1m 12h 1m

Solar UV radiation in Dumai, Riau, Indonesia §

Dumai experiences the highest level of ultraviolet (UV) radiation in February, March and April, when the maximum UV index can reach values of 15 - 16, which corresponds to the Extreme category of sun exposure. January, June and July are in the Extreme exposure category. In these months, the maximum values of the UV index do not exceed 13. For more detailed information, check out our hourly Dumai UV Index data.

Average daily maximum UV levels by month for Dumai, Riau, Indonesia. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 13 15 16 15 14 12 12 14 14 14 13 13

Detailed Monthly Weather Insights for Dumai, Riau, Indonesia

Discover in-depth weather details for every month in Dumai. Click through the links below for comprehensive overviews of temperature trends, precipitation levels, sunshine hours, and solar UV radiation specifics. Whether planning a visit or simply curious about Dumai's climate nuances, these monthly breakdowns provide the information you need for an informed understanding of what to expect throughout the year.

Each link leads to a detailed account of the typical weather conditions for that month, providing both locals and tourists with vital information to plan their daily activities, wardrobe, and travel itineraries accordingly.