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This page shows both the average monthly rainfall and the number of rainy days in Pekanbaru, Sumatra, Indonesia. These values are calculated using 30 years of data (1990–2020) to ensure accuracy. Now, let's explore all the details to give you a full picture.
Pekanbaru is known for its substantial rainfall, with annual precipitation reaching 2610 mm (103 in).
The climate in Pekanbaru shows significant variation throughout the year. Expect 313 mm (12 in) of precipitation during the wettest month November, distributed over 22 rainy days.
In contrast, July offers drier and sunnier days, with around 134 mm (5.3 in) of rainfall over 13 rainy days.
November, the wettest month, has a maximum daytime temperature of 32°C (90°F). During the driest month July you can expect a temperature of 33°C (91°F). For more detailed insights into the city's temperatures, visit our Pekanbaru Temperature page.
Average daily rainfall for each day of the month based on long-term records. 47-year average (1976-2025)
Browse day-by-day precipitation records for Pekanbaru spanning 51 years. Select any month and year to see actual rainfall and snowfall recorded on each day.
The map below shows the annual precipitation across Indonesia. You can also select the different months in case you are interested in a specific month.
Pekanbaru's average annual precipitation is 2610 mm (103 in). Let's compare this to some popular worldwide tourist destinations:
Athens, Greece, receives an average annual precipitation of 400 mm (16 in), making it one of the drier Mediterranean climates with rainfall mostly in winter.
In Seoul, South Korea, the average annual precipitation is 1237 mm (49 in), with most rain falling during the summer monsoon season.
In Brisbane, Australia, the annual precipitation is 979 mm (39 in), making it wetter than Sydney.
Bangkok, Thailand, experiences a tropical monsoon climate with 1668 mm (66 in) of annual rainfall, with the heaviest precipitation occurring during September and October.
Precipitation amounts are measured using specific gauges installed at weather stations, collecting both rain and snow and any other type of precipitation. Rainfall is measured directly in millimeters, while that from snow and ice is obtained by melting it. Automated systems often incorporate heaters to make this easier.
Information from these stations is transmitted via Wi-Fi, satellite, GPS, or telephone connections to central monitoring networks. This information is immediately updated and integrated into weather models and forecasts.
For more detailed information about Pekanbaru's weather, including sunshine hours, humidity levels, and temperature data, visit our Pekanbaru Climate page.
Pick a month to see the average temperature, rainfall and sunshine in Pekanbaru - and find the best time to visit.
Temperature Rainfall
See the full Pekanbaru climate overview or explore weather in Indonesia.
Where to go in September - average daytime high across popular destinations.
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