Weather in Манаус: What to Expect by Month

Манаус lies deep in the Amazon rainforest, where the weather stays warm year-round but shifts between wet and dry seasons. From January to April, the city experiences its rainiest months, with frequent downpours and high humidity. By May, the rains begin to ease, leading into the drier period from June to October, when sunshine becomes more consistent and temperatures climb slightly.

Travelers visiting Манаус in the wet season should prepare for daily showers, often heavy but short-lived. The dry season, particularly July to September, offers more predictable weather, though the heat remains steady. Even in the driest months, the air feels thick with moisture, a hallmark of the Amazon’s tropical climate.

Temperatures in Манаус vary little throughout the year, hovering around +28 °C on average. The warmest months are August to October, when daytime highs can reach +33...+34 °C, while nights rarely drop below +24 °C. Even in the cooler months, like February or March, the difference is minimal, with averages around +27.6...+27.7 °C.

The consistency of the heat means visitors to Манаус can expect warm conditions no matter when they arrive. The slight rise in temperatures during the dry season is noticeable but not extreme, making the city’s climate feel stable compared to more temperate regions. The lack of significant seasonal swings makes packing for Манаус simpler, though the humidity remains a constant factor.

Rainfall defines the rhythm of life in Манаус, with the wettest period stretching from January to April. During these months, the city receives over 300 mm of rain each month, often in the form of intense afternoon storms. March is typically the peak, with 333.7 mm of precipitation, while May marks the start of a gradual decline.

By June, the rains taper off sharply, and the dry season takes hold. July and August are the driest months, with rainfall dropping to around 58–74 mm. Even in this period, brief showers can occur, but they’re far less frequent. The transition months, like November and December, bring a mix of rain and sunshine, signaling the return of the wetter season.

For a trip to Манаус during the wet season, waterproof gear is essential. Lightweight, quick-drying clothing will help manage the combination of heat and humidity, while a compact umbrella or rain jacket can be useful for sudden downpours. Footwear should be water-resistant, as streets and trails can become slick.

In the dry season, breathable fabrics are still a must, but the focus shifts to sun protection. A wide-brimmed hat, sunglasses, and high-SPF sunscreen will help guard against the stronger sunlight. Even in drier months, the air remains humid, so layers that wick moisture away from the skin will keep you comfortable during outdoor activities in Манаус.