São Miguel do Guamá in Fall
In fall (March, April and May), São Miguel do Guamá sees average daytime highs around 31°C and overnight lows near 23°C, with 915 mm of rain over about 85 wet days across the season. It is the coldest season of the year and the wettest season of the year.
Across fall, daytime highs hold fairly steady around 31°C. The sky is clear or mostly clear about 3% of the time across fall, and the air most often feels oppressive.
Fall is São Miguel do Guamá's weakest season of the year to visit on our travel score. For the whole year in context, see São Miguel do Guamá's year-round climate.
- Avg daytime high
- 31°C
- coldest season of the year
- Avg overnight low
- 23°C
- Rainfall
- 915 mm
- 85 wet days
- Avg wind
- 6 km/h
- Travel score
- 2.6
- weakest season of the year
- Months
- Mar · Apr · May
Temperature in São Miguel do Guamá in Fall
Across fall, daytime highs hold fairly steady around 31°C.
A typical fall day in São Miguel do Guamá reaches about 31°C and drops to 23°C overnight. The warmest of the three months is May, the coolest May.
How fall really feels in São Miguel do Guamá
Once humidity and wind are folded in, fall brings about 92 days that feel above 32°C and 0 that feel at or below 0°C.
The story in fall is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
São Miguel do Guamá weather by month
How the three fall months (March, April and May) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 32° / 23° | 198 | 25.2 | 12.1 | 2.6 |
| Feb | 31° / 23° | 276 | 25.9 | 12.1 | 2.5 |
| Mar | 31° / 23° | 352 | 30.1 | 12 | 2.5 |
| Apr | 31° / 23° | 348 | 28.9 | 12 | 2.5 |
| May | 31° / 23° | 215 | 25.5 | 11.9 | 2.8 |
| Jun | 31° / 23° | 95 | 18.5 | 11.9 | 3.5 |
| Jul | 32° / 22° | 66 | 13.3 | 11.9 | 4.0 |
| Aug | 33° / 23° | 28 | 7.6 | 11.9 | 4.0 |
| Sep | 34° / 23° | 21 | 5.6 | 12 | 3.6 |
| Oct | 34° / 24° | 24 | 6 | 12 | 3.3 |
| Nov | 34° / 24° | 41 | 7.3 | 12.1 | 3.2 |
| Dec | 33° / 24° | 89 | 15 | 12.1 | 3.0 |
Cloud cover in Fall
The sky is clear or mostly clear about 3% of the time across fall.
Chance of precipitation in Fall
São Miguel do Guamá gets around 915 mm of rain over 85 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 6 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 hours in early March to 11 h 54 min by late May. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 4.2 kWh/m².
Hazard calendar for São Miguel do Guamá
In fall, São Miguel do Guamá overlaps its monsoon season. The full year is below, with each hazard's peak months called out.
São Miguel do Guamá's monsoon runs January–May, when most of the year's rain falls.
Is fall a good time to visit São Miguel do Guamá?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is a weaker month for outdoor sightseeing in São Miguel do Guamá.
What to pack for São Miguel do Guamá in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, São Miguel do Guamá sees daytime highs around 31°C and nights near 23°C. Pack light clothes and rain gear. About 85 days see rain.
UV index in São Miguel do Guamá in Fall
Clear-sky midday UV across fall averages around 14 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in São Miguel do Guamá peaks around March 17 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 17 at about 10 (extreme).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 13 | 14 | 15 | 14 | 12 | 11 | 10 | 11 | 12 | 12 | 10 | 11 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 13 | Extreme |
| Feb | 14 | Extreme |
| Mar | 15 | Extreme |
| Apr | 14 | Extreme |
| May | 12 | Extreme |
| Jun | 11 | Extreme |
| Jul | 10 | Extreme |
| Aug | 11 | Extreme |
| Sep | 12 | Extreme |
| Oct | 12 | Extreme |
| Nov | 10 | Extreme |
| Dec | 11 | Extreme |
Air quality in São Miguel do Guamá in Fall
Average fine-particle pollution (PM2.5) through the year — so you can see where fall falls, not just the annual average.
Air quality in São Miguel do Guamá is worst in November — around 21 µg/m³ PM2.5 (moderate), about 2.7× the cleanest month (July, 8 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 17 | 20 | 20 | 15 | 10 | 8 | 8 | 9 | 11 | 13 | 21 | 19 |
| Level | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good | Good | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 17 | Moderate |
| Feb | 20 | Moderate |
| Mar | 20 | Moderate |
| Apr | 15 | Moderate |
| May | 10 | Good |
| Jun | 8 | Good |
| Jul | 8 | Good |
| Aug | 9 | Good |
| Sep | 11 | Good |
| Oct | 13 | Moderate |
| Nov | 21 | Moderate |
| Dec | 19 | Moderate |
Where is São Miguel do Guamá?
São Miguel do Guamá sits at 1.6°S, 47.5°W, 9 m above sea level, in Brazil. The nearest listed city is Irituia, 17 km away.
Topography around São Miguel do Guamá
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of São Miguel do Guamá.
Within 3 km, the terrain around São Miguel do Guamá has only modest variations in elevation — a maximum elevation change of 43 m around an average of 12 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 66 m; within 80 km, only modest variations in elevation — a maximum elevation change of 153 m.
The land around São Miguel do Guamá is covered by trees (52%) within 3 km, trees (70%) and grassland (27%) within 16 km, and trees (61%) and grassland (37%) within 80 km.
Brazil travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / N
- 127 / 220 V · 60 Hz
- Prices
- ≈ 46% of US
- price level, 2025
- GDP per capita
- $10,713
- 2025
- Happiness
- 6.6 / 10
- World Happiness, 2025
- Safe drinking water
- 89%
- of population, 2024
- Homicide rate
- 19.3
- per 100k, 2023
- Road deaths
- 16
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Low
- EF EPI 482
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for São Miguel do Guamá (-1.6267°, -47.4833°, elevation 9 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.