Weather in Belém

Belém is in Brazil at 1.5°S. The 2001–2020 NASA POWER daily record describes an equatorial climate that stays hot and wet. October is the warmest month (average 29.4°C, high 33.7°C) and February is the coolest (average 26.2°C, low 24.3°C).

Rain is rain in every month and about 2569 mm across the year. The wettest month is March at 411 mm; the driest is September at 75 mm. On this site the months that score closest to a 22°C day, lighter rain, and moderate humidity are February, June, and July.

Rain through the year

Rain does not take a season off. Belém receives about 2569 mm a year, and even September still sees 75 mm. March is the peak at 411 mm and 30 days with at least 1 mm.

A rainy day here is a day with at least 1 mm in the NASA POWER series. March averages 30 such days; September averages 16.

How warm Belém gets

Monthly average highs run from 28.2°C in February to 33.7°C in October. Nights follow the same curve: 24.3°C in February and 25.1°C in October.

Mean high across all twelve months is 30.2°C and mean low is 24.5°C. These are 20-year grid averages, so a city station can read a few degrees warmer or cooler.

What stands out month by month

In January, Belém averages 29.0°C by day and 24.3°C at night, with 311 mm of rain. The year bottoms out in February. Plan for 24.3°C at night and 28.2°C in the afternoon. March is the wettest month — 411 mm and 30 rainy days, with 92% humidity. In May, Belém averages 28.4°C by day and 24.6°C at night, with 275 mm of rain. June brings 171 mm and 25 rainy days; temperatures run from 24.3°C to 28.8°C.

July stands apart from the months beside it: 29.0°C / 24.1°C and 120 mm. September is the driest month, averaging only 75 mm across 16 rainy days. Highs sit near 33.3°C. October is the warmest month. Afternoon highs average 33.7°C and nights settle near 25.1°C, with 79 mm of rain. December stands apart from the months beside it: 31.4°C / 24.8°C and 188 mm.

Best months to visit Belém

The three months with the highest comfort score are February, June, and July: February (26.2°C average, 369 mm, 92% humidity); June (26.5°C average, 171 mm, 89% humidity); July (26.6°C average, 120 mm, 88% humidity). They fall in calendar order. The score rewards averages near 22°C, lower rainfall, and humidity near 60%. It is a climate score, not a festival or price calendar.

If you prefer the hottest stretch, that is October. The coolest stretch is February.

How Belém compares inside Brazil

Fortaleza is about 1135 km away: Belém is 1.1°C warmer than Fortaleza in its hottest month and 1487 mm wetter over the year than Fortaleza. Fortaleza’s wettest month is April (249 mm) versus March here.

Manaus is about 1293 km away: Belém is about as warm as Manaus at the hot peak and 610 mm wetter over the year than Manaus. Manaus’s wettest month is March (268 mm) versus March here.

Brasília is about 1594 km away: Belém is 3.8°C warmer than Brasília in its hottest month and 1266 mm wetter over the year than Brasília. Brasília’s wettest month is December (221 mm) versus March here.