Weather in Pekanbaru in August

A hard month. August asks something of you. Go in knowing what. The heat itself is manageable at 29.5 °C, but 89% humidity is what you will actually feel.

Pekanbaru barely has seasons. August scores 46 out of 100 against a best of 47 in January — a gap small enough that the month you choose matters far less here than the week you choose.

Rain on 19 days, 6 of them heavy. Enough to need a plan B, not enough to need a plan around it. Natural fibres and a second shirt for the day. At 89% nothing dries, including you.

What the averages hide

Averages flatten a month, and this one hides a few things: 11 days top 30 °C — hot spells arrive, but they break; the day barely swings — 6 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest August day reached 31.4 °C and the coldest night fell to 20.8 °C, and the wettest single day dropped 81 mm — roughly 44% of the month's rain in one day.

August is moderately variable: 55 mm in the driest year against 445 mm in the wettest, around an average of 185 mm. Roughly two Augusts in three land near that average, and the third does something else entirely.

Wind is light at 0.6 km/h, so the temperature on the page is close to the temperature on your skin, and humidity at 89% is the real story though — it is the number that decides how the day feels, not the 29.5 °C.

How August sits in the year

Temperatures hold steady either side: 29.2 °C in July, 29.5 here, 29.5 in September. Nothing about the timing within the month matters much.

Daylight in August

Pekanbaru sits close enough to the equator that daylight barely moves all year — 12.1 hours in August, against a range of just 0.1 hours across the whole calendar. Sunrise and sunset land at roughly the same time whenever you come.

An inland climate

Despite being inland, the year stays fairly even: 6.4 °C between the year's warmest afternoons and coldest nights.

How busy it gets

Peak season. Expect the highest prices of the year and to be booking well ahead. If the dates are flexible, February is the trade worth considering — 2 points weaker on weather, and materially quieter.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

August in Pekanbaru versus nearby

If Pekanbaru is one option among several, the nearby comparison is worth making. Padang is close enough to be a coin toss — within a degree on temperature, 1 day more rain. Singapore is close enough to be a coin toss — within a degree on temperature, 4 days more rain.

So: August is effectively as good as it gets here — 1 points behind January, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in Pekanbaru

See all twelve months in Pekanbaru, or where else to go in August.