Weather in Belém in August

A hard month. August asks something of you. Go in knowing what. You should expect rain on 19 days of the month, which is more days wet than dry.

Belém barely has seasons. August scores 48 out of 100 against a best of 49 in February — a gap small enough that the month you choose matters far less here than the week you choose.

This is persistent light rain rather than storms: 19 wet days but only 2 heavy ones. It rarely cancels anything outright, and it rarely fully clears either. A jacket beats an umbrella. Pack for 31 °C days and 24.2 °C nights; the spread matters more here than any single number.

What the averages hide

Averages flatten a month, and this one hides a few things: 21 days top 30 °C, making the heat continuous rather than occasional. Across the twenty years measured, the hottest August day reached 34.9 °C and the coldest night fell to 21.3 °C, and the wettest single day dropped 31 mm — roughly 33% of the month's rain in one day.

August is statistically steady but not small: the year-to-year variation is modest in relative terms, yet the wettest August on record still delivered 153 mm against 46 mm in the driest. In a month this wet, even a tame spread is a lot of rain in absolute terms — the 93 mm average is a reasonable planning figure, not a promise.

Wind is light at 2.7 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 81%, high enough to notice on the warm days without dominating them.

How August sits in the year

The month is on the way up: 2 °C warmer than July, and September adds another 2.2 °C. Late in the month feels noticeably different from the start of it, which is worth knowing if the trip is short.

Daylight in August

Belém sits close enough to the equator that daylight barely moves all year — 12.1 hours in August, against a range of just 0.2 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: 9.7 °C between the year's warmest afternoons and coldest nights.

How busy it gets

Busy. Popular without being frantic; book the things you care about, improvise the rest.

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

August in Belém versus nearby

If Belém is one option among several, the nearby comparison is worth making. Fortaleza is a better bet in August — within a degree on temperature, 17 days less rain. Manaus is a better bet in August — within a degree on temperature, 7 days less rain.

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

Every month in Belém

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