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Belem sits at 1.5 degrees south of the equator at the mouth of the Amazon River in northern Brazil. The city has a true equatorial climate (Koppen Af) with hot, humid conditions year-round and no real dry season. Temperatures vary by only about 2 degrees C across the entire year, and humidity stays between 80 and 90 percent. What changes is the rain: Belem gets roughly 2,900mm (114 inches) annually, with a notably wetter period from December through May and a somewhat drier stretch from August through November.
Daytime highs sit at 30 to 32 degrees C (86 to 90 degrees F) every month of the year. Nighttime lows hover at 22 to 24 degrees C (72 to 75 degrees F). Sea temperatures stay at 27 to 28 degrees C (81 to 82 degrees F) year-round. The city receives between 3.3 and 8 hours of sunshine per day depending on the month.
| Month | Avg High (C/F) | Avg Low (C/F) | Rainfall (mm) | Rain Days | Sun (hrs/day) | Humidity |
|---|---|---|---|---|---|---|
| Jan | 31 / 87 | 23 / 74 | 366 | 26 | 4.5 | 86% |
| Feb | 30 / 86 | 23 / 73 | 418 | 25 | 3.8 | 90% |
| Mar | 30 / 86 | 23 / 74 | 437 | 27 | 3.3 | 89% |
| Apr | 31 / 87 | 23 / 74 | 380 | 26 | 4.2 | 89% |
| May | 31 / 88 | 23 / 74 | 305 | 25 | 5.6 | 87% |
| Jun | 32 / 89 | 23 / 73 | 168 | 21 | 7.1 | 83% |
| Jul | 32 / 89 | 22 / 72 | 151 | 18 | 7.7 | 82% |
| Aug | 32 / 90 | 22 / 72 | 117 | 15 | 8.0 | 80% |
| Sep | 32 / 90 | 22 / 72 | 121 | 16 | 7.1 | 80% |
| Oct | 32 / 90 | 22 / 72 | 121 | 15 | 6.7 | 80% |
| Nov | 32 / 90 | 23 / 73 | 126 | 15 | 6.1 | 80% |
| Dec | 32 / 89 | 23 / 74 | 230 | 20 | 5.2 | 83% |
Belem Weather by Month: January
January sits deep in Belem’s wet season with 366mm of rainfall spread across 26 days. Highs reach 31 degrees C (87 degrees F) with lows of 23 degrees C (74 degrees F). Afternoon thunderstorms are the norm: they build up from late morning and typically dump heavy rain between 2pm and 5pm. You will get about 4.5 hours of sunshine per day, mostly in the morning. Pack a rain jacket and plan outdoor activities before noon. The Guama River and bay water temperature is 28 degrees C (82 degrees F), warm enough for swimming any time.
Belem Weather by Month: February
February is Belem’s most humid month at 90 percent, with 418mm of rain over 25 days. Temperatures hold steady at highs of 30 degrees C (86 degrees F) and lows of 23 degrees C (73 degrees F). This is Carnival season in Brazil, and Belem celebrates with street parties (blocos) that happen rain or shine. Sunshine drops to 3.8 hours per day, the second-lowest of the year. Rain falls in intense bursts lasting 1 to 2 hours, then clears. Bring quick-dry clothing and waterproof shoes for flooded streets.
Belem Weather by Month: March
March is the wettest month in Belem with 437mm of rainfall across 27 days, and the least sunny at just 3.3 hours per day. Temperatures remain steady: highs of 30 degrees C (86 degrees F), lows of 23 degrees C (74 degrees F). The Intertropical Convergence Zone sits directly over the city, producing near-daily heavy downpours. Streets in lower-lying neighborhoods (Cidade Velha, Campina) flood regularly. If you visit in March, stay in elevated areas like Nazare or Umarizal and use ride-hailing apps (Uber, 99) rather than walking between sights.
Belem Weather by Month: April
April still gets heavy rain (380mm over 26 days) but sunshine increases to 4.2 hours daily. Highs of 31 degrees C (87 degrees F), lows of 23 degrees C (74 degrees F). The rain pattern starts shifting: mornings are more reliably dry, with storms concentrated between 3pm and 6pm. The Cirio de Nazare preparations begin around this time, though the main festival is in October. Humidity stays at 89 percent. April marks the gradual transition toward the drier season.
Belem Weather by Month: May
May sees rainfall drop to 305mm over 25 days with 5.6 hours of daily sun. Temperatures reach 31 degrees C (88 degrees F) with lows of 23 degrees C (74 degrees F). The rains become less frequent but still appear on most days. This is a transitional month where you start getting longer dry windows between storms. Humidity drops slightly to 87 percent. May can be a reasonable month for visiting if you accept that rain will interrupt some activities.
Belem Weather by Month: June
June marks the start of Belem’s drier season with rainfall dropping to 168mm over 21 days and sunshine jumping to 7.1 hours per day. Highs reach 32 degrees C (89 degrees F), lows 23 degrees C (73 degrees F). This is when the Amazon river level begins falling after the annual flood peak in May. Humidity drops to 83 percent. June through November is the best window for river trips to Marajo Island because lower water levels expose more beaches and make navigation easier. Festas Juninas (June festivals) bring traditional food stalls and quadrilha dances to city squares.
Belem Weather by Month: July
July is one of Belem’s best months with 151mm of rain over 18 days and 7.7 hours of daily sunshine. Highs reach 32 degrees C (89 degrees F) with the coolest lows of the year at 22 degrees C (72 degrees F). The lower humidity (82 percent) makes the heat feel less oppressive. July is Brazilian school holiday month, so domestic tourism picks up. Hotel prices rise slightly. Morning and evening are comfortable for walking; midday still calls for air conditioning. The Ver-o-Peso market is at its most vibrant with peak fish and acai harvests.
Belem Weather by Month: August
August is the driest and sunniest month in Belem with just 117mm of rain over 15 days and 8 hours of daily sunshine. Highs hit 32 degrees C (90 degrees F), lows 22 degrees C (72 degrees F). Humidity drops to its annual low of 80 percent. This is the best month for outdoor activities: island hopping to Combu and Mosqueiro, walking tours of Cidade Velha, and evening dining at Estacao das Docas. River beaches on Mosqueiro Island (Praia do Farol, Praia do Marahu) are at their best. Book accommodations early as this is peak domestic travel season.
Belem Weather by Month: September
September maintains the dry pattern with 121mm of rain over 16 days and 7.1 hours of daily sun. Highs are 32 degrees C (90 degrees F), lows 22 degrees C (72 degrees F). Humidity stays at 80 percent. The combination of low rain and warm river temperatures makes this an excellent month for visiting Combu Island’s waterfront restaurants and exploring the Mangal das Garcas park. The Círio de Nazare build-up begins with smaller processions (romarias) through the city starting in late September.
Belem Weather by Month: October
October brings 121mm of rain over 15 days and 6.7 hours of daily sun. Highs of 32 degrees C (90 degrees F), lows of 22 degrees C (72 degrees F). The big event is Cirio de Nazare on the second Sunday of October, drawing 2 million pilgrims to Belem. The procession goes from the Se Cathedral to the Basilica of Nazare, a 3.6km route. The city is packed; book hotels 3 to 6 months in advance. Weather during Cirio is typically hot and humid but the drier pattern means the procession itself is rarely rained out.
Belem Weather by Month: November
November gets 126mm of rain over 15 days with 6.1 hours of sun. Highs hit 32 degrees C (90 degrees F), lows 23 degrees C (73 degrees F). This is the tail end of the drier season and one of the best months for a visit. The crowds from Cirio have dispersed, hotel prices drop, and the weather is still relatively dry. The Republic Proclamation holiday (November 15) can bring a long weekend with higher domestic travel.
Belem Weather by Month: December
December marks the return of the wet season with 230mm of rain over 20 days and 5.2 hours of daily sun. Highs of 32 degrees C (89 degrees F), lows of 23 degrees C (74 degrees F). Christmas lights illuminate the Praca da Republica and Estacao das Docas. The rains increase through the month, and by late December the daily downpour pattern is back in full force. New Year’s Eve is celebrated with fireworks over Guajara Bay at Estacao das Docas. Check our best time to visit guide for more. Check our things to do in Belem for more. Check our events and festivals calendar for more. Check our neighborhoods guide for more. Check our where to stay guide for more. Check our travel tips and FAQ for more.
