Manaus, Brazil — Weather in September 2026

Climate Overview

Manaus, Brazil in September has hot conditions, with highs reaching 33°C (91°F) and afternoons the warmest part of the day. Rain falls on about 14 days this month.

This month falls at the beginning of Spring. The combination of heat and frequent rain creates tropical monsoon conditions.

Temperatures remain fairly steady throughout September, with daily highs around 33°C (91°F).

September sees fairly even rainfall, totalling about 86 mm across the month.

The warmest days tend to fall around the 21th, averaging 33.6°C (92°F).

Compared to August, this month is about 1°C warmer with 3 more rainy days.

Monthly September Averages

Temperature

33°C / 25°C

Feels Like

39°C / 30°C

Rain

14 days · 86 mm

Sunshine

10.7h / day

Humidity

76% — Muggy

Wind

10 km/h

Wind Direction

ENE (63°)

Gusts

30 km/h

Daylight

12.1 h

Cloud Cover

62%

Clear Sky Days

2.8

UV Index

8.8 — Very High

Dew Point

24°C — Oppressive

Moon Phase

Waxing Crescent · 11%

Climate Charts

Daily averages based on historical data (2016–2025)

Daily Temperature

High Low

Daily Precipitation

Rainfall

Daily Sunshine

Sunshine

Daily Wind Speed

Wind Speed

Sun Position

Sunrise 05:53

Daylight 12.1h

Sunset 17:58

What to Expect

With midday temperatures reaching 33°C (91°F), schedule outdoor activities for early morning or late afternoon. Evenings remain warm enough for comfortable outdoor dining and night markets. Keep afternoons flexible as tropical showers are common — they typically clear within an hour.

Rain most often builds later in the day, so mornings are typically the driest window and afternoon showers are more likely.

2 of the last 5 yearly records were warmer than this month's long-run average.

Compare Months

Month	Temp	Feels Like	Rain	Sun	Humidity	UV	Status	Details
January	30°C / 24°C	36°C / 29°C	25days (269 mm) Wet	8.7h Good	86% Very Muggy	8.3 Very High	Wet	View Details
February	30°C / 24°C	35°C / 29°C	25days (293 mm) Wet	7.8h Good	87% Very Muggy	8.1 Very High	Wet	View Details
March	30°C / 24°C	36°C / 30°C	28days (357 mm) Wet	7.7h Good	87% Very Muggy	8 Very High	Wet	View Details
April	30°C / 24°C	36°C / 30°C	28days (337 mm) Wet	7.8h Good	88% Very Muggy	7.9 Very High	Wet	View Details
May	30°C / 24°C	36°C / 30°C	27days (272 mm) Wet	8.7h Good	87% Very Muggy	7.7 Very High	Wet	View Details
June	30°C / 24°C	36°C / 29°C	20days (137 mm) Wet	9.9h Good	86% Very Muggy	7.5 Very High	Wet	View Details
July best	31°C / 24°C	36°C / 29°C	12days (61 mm) Wet	10.6h Excellent	81% Humid	7.8 Very High	Poor	View Details
August	32°C / 25°C	38°C / 29°C	11days (57 mm) Wet	10.8h Excellent	77% Humid	8.4 Very High	Poor	View Details
September	33°C / 25°C	39°C / 30°C	14days (86 mm) Wet	10.7h Excellent	76% Humid	8.8 Very High	Poor	View Details
October	32°C / 25°C	39°C / 31°C	18days (141 mm) Wet	10.2h Excellent	78% Humid	8.9 Very High	Wet	View Details
November	31°C / 25°C	37°C / 31°C	21days (185 mm) Wet	9.5h Good	83% Humid	8.3 Very High	Wet	View Details
December	30°C / 25°C	36°C / 30°C	28days (331 mm) Wet	8.3h Good	87% Very Muggy	7.7 Very High	Wet	View Details

What to Wear

Light, breathable fabrics like cotton and linen are essential. Opt for loose-fitting clothing in light colors to stay cool.

A waterproof jacket or compact umbrella is recommended for occasional showers.

Packing List

UmbrellaWaterproof jacketWaterproof shoesBreathable clothingSunscreen (SPF 30+)Sun hatSunglasses

Frequently Asked Questions

Expand all

Is September a good time to visit Manaus?

September is typically poor for visiting Manaus, with average highs of 33°C (91°F) and around 14 rainy days. Manaus, Brazil in September has hot conditions, with highs reaching 33°C (91°F) and afternoons the warmest part of the d

Does it rain a lot in Manaus in September?

Manaus typically sees around 14 rainy days in September with 86 mm (3.4 in) of total rainfall. Pack a waterproof jacket.

Does it get cold at night in Manaus in September?

Nights stay pleasantly warm in Manaus during September, around 25°C (77°F). Light evening wear is sufficient.

What should I pack for Manaus in September?

With highs of 33°C (91°F) and lows of 25°C (77°F) in September, we recommend: Umbrella, Waterproof jacket, Waterproof shoes, Breathable clothing, Sunscreen (SPF 30+). Comfortable walking shoes are essential.

Is September among the best months weather-wise in Manaus?

September is not the most favourable month weather-wise in Manaus. Consider visiting during months with milder temperatures or less rainfall for a better experience.

What is the UV index in Manaus in September?

The average UV index in Manaus during September is 9 (very high). Strong sun protection is essential — SPF 50+, protective clothing, and avoid prolonged outdoor exposure during peak hours.

How many hours of daylight are there in Manaus in September?

Manaus gets approximately 12 hours of daylight per day in September, with around 11 hours of sunshine.

Does it snow in Manaus in September?

Snow is uncommon in Manaus during September based on 10-year climate averages.

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