São Mateus in Fall
In fall (March, April and May), São Mateus sees average daytime highs around 27°C and overnight lows near 23°C, with 314 mm of rain over about 48 wet days across the season. It is the 2nd-warmest season and the 3rd-wettest season.
Over the season highs ease from about 28°C in early March to 25°C by late May. The sky is clear or mostly clear about 43% of the time across fall, and the air most often feels oppressive.
Fall is São Mateus's 3rd-best season to visit on our travel score. São Mateus has little temperature swing across the year, so its calendar seasons blur — the season framing matters less here than for a place with four distinct seasons. For the whole year in context, see São Mateus's year-round climate.
- Avg daytime high
- 27°C
- 2nd-warmest season
- Avg overnight low
- 23°C
- Rainfall
- 314 mm
- 48 wet days
- Avg wind
- 15 km/h
- Travel score
- 5.7
- 3rd-best season
- Months
- Mar · Apr · May
Temperature in São Mateus in Fall
Over the season highs ease from about 28°C in early March to 25°C by late May.
A typical fall day in São Mateus reaches about 27°C and drops to 23°C overnight. The warmest of the three months is March, the coolest May.
São Mateus 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 | 28° / 24° | 106 | 13.4 | 13 | 5.9 |
| Feb | 28° / 24° | 76 | 13.9 | 12.6 | 5.4 |
| Mar | 28° / 24° | 136 | 18.2 | 12.1 | 5.2 |
| Apr | 27° / 24° | 108 | 16.9 | 11.6 | 5.6 |
| May | 26° / 22° | 70 | 13.2 | 11.1 | 6.4 |
| Jun | 25° / 21° | 52 | 11.8 | 10.9 | 6.8 |
| Jul | 24° / 21° | 57 | 13.2 | 11 | 6.8 |
| Aug | 24° / 21° | 48 | 11.2 | 11.4 | 7.1 |
| Sep | 25° / 22° | 54 | 10.8 | 11.9 | 6.9 |
| Oct | 26° / 23° | 96 | 13.4 | 12.4 | 6.2 |
| Nov | 26° / 23° | 183 | 17.6 | 12.9 | 5.3 |
| Dec | 27° / 24° | 147 | 15.5 | 13.1 | 5.5 |
Cloud cover in Fall
The sky is clear or mostly clear about 43% of the time across fall.
Chance of precipitation in Fall
São Mateus gets around 314 mm of rain over 48 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 15 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 24 min in early March to 11 hours 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 5.0 kWh/m².
Is fall a good time to visit São Mateus?
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 reasonable time to visit São Mateus for sightseeing.
What to pack for São Mateus in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, São Mateus sees daytime highs around 27°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 48 days see rain.
Sea temperature near São Mateus in Fall
The nearest coast averages about 27°C across fall — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 27 km away) is warmest in March at about 28°C and coldest in August near 24°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 27 | 27 | 28 | 27 | 26 | 25 | 24 | 24 | 25 | 25 | 26 | 26 |
| Comfort | Warm | Warm | Warm | Warm | Warm | Warm | Warm | Warm | Warm | Warm | Warm | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 27 | Warm |
| Feb | 27 | Warm |
| Mar | 28 | Warm |
| Apr | 27 | Warm |
| May | 26 | Warm |
| Jun | 25 | Warm |
| Jul | 24 | Warm |
| Aug | 24 | Warm |
| Sep | 25 | Warm |
| Oct | 25 | Warm |
| Nov | 26 | Warm |
| Dec | 26 | Warm |
UV index in São Mateus in Fall
Clear-sky midday UV across fall averages around 10 (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 Mateus peaks around February 13 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 7 (high).
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) | 14 | 15 | 13 | 10 | 8 | 7 | 7 | 9 | 10 | 12 | 14 | 13 |
| Level | Extreme | Extreme | Extreme | Extreme | Very high | High | High | Very high | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 14 | Extreme |
| Feb | 15 | Extreme |
| Mar | 13 | Extreme |
| Apr | 10 | Extreme |
| May | 8 | Very high |
| Jun | 7 | High |
| Jul | 7 | High |
| Aug | 9 | Very high |
| Sep | 10 | Extreme |
| Oct | 12 | Extreme |
| Nov | 14 | Extreme |
| Dec | 13 | Extreme |
Where is São Mateus?
São Mateus sits at 18.7°S, 39.9°W, 38 m above sea level, in Brazil. The nearest listed city is Conceição da Barra, 19 km away.
Topography around São Mateus
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of São Mateus.
Within 3 km, the terrain around São Mateus has only modest variations in elevation — a maximum elevation change of 51 m around an average of 22 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 95 m; within 80 km, large variations in elevation — a maximum elevation change of 744 m.
The land around São Mateus is covered by trees (34%), artificial surfaces (26%) and grassland (21%) within 3 km, trees (55%) and grassland (26%) within 16 km, and grassland (37%), trees (33%) and water (27%) 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 Mateus (-18.7201°, -39.8589°, elevation 38 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.