São Simão in Summer
In summer (December, January and February), São Simão sees average daytime highs around 31°C and overnight lows near 23°C, with 714 mm of rain over about 69 wet days across the season. It is the 2nd-warmest season and the wettest season of the year.
Across summer, daytime highs hold fairly steady around 31°C. The sky is clear or mostly clear about 14% of the time across summer, and the air most often feels oppressive.
Summer is São Simão's weakest season of the year to visit on our travel score. For the whole year in context, see São Simão's year-round climate.
- Avg daytime high
- 31°C
- 2nd-warmest season
- Avg overnight low
- 23°C
- Rainfall
- 714 mm
- 69 wet days
- Avg wind
- 7 km/h
- Travel score
- 3.2
- weakest season of the year
- Months
- Dec · Jan · Feb
Temperature in São Simão in Summer
Across summer, daytime highs hold fairly steady around 31°C.
A typical summer day in São Simão reaches about 31°C and drops to 23°C overnight. The warmest of the three months is February, the coolest December.
How summer really feels in São Simão
Once humidity and wind are folded in, summer brings about 90 days that feel above 32°C and 0 that feel at or below 0°C.
The story in summer is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
São Simão weather by month
How the three summer months (December, January and February) 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 | 31° / 23° | 267 | 23.8 | 13 | 3.2 |
| Feb | 31° / 23° | 207 | 21.4 | 12.6 | 3.2 |
| Mar | 31° / 22° | 194 | 21.3 | 12.1 | 3.5 |
| Apr | 30° / 21° | 72 | 10 | 11.6 | 4.9 |
| May | 29° / 19° | 28 | 4.4 | 11.1 | 6.5 |
| Jun | 29° / 18° | 14 | 1.6 | 10.9 | 7.1 |
| Jul | 29° / 17° | 8 | 0.9 | 11 | 7.0 |
| Aug | 31° / 19° | 10 | 1.7 | 11.4 | 5.6 |
| Sep | 33° / 21° | 45 | 6.1 | 11.9 | 4.1 |
| Oct | 33° / 22° | 115 | 13.9 | 12.4 | 3.3 |
| Nov | 31° / 22° | 185 | 19.6 | 12.9 | 3.3 |
| Dec | 31° / 23° | 241 | 24.1 | 13.1 | 3.1 |
Cloud cover in Summer
The sky is clear or mostly clear about 14% of the time across summer.
Chance of precipitation in Summer
São Simão gets around 714 mm of rain over 69 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 7 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 13 h 06 min in early December to 12 h 24 min by late February. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 5.8 kWh/m².
Hazard calendar for São Simão
In summer, São Simão overlaps its monsoon season. The full year is below, with each hazard's peak months called out.
São Simão's monsoon runs November–March, when most of the year's rain falls.
Is summer a good time to visit São Simão?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a weaker month for outdoor sightseeing in São Simão.
What to pack for São Simão in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, São Simão sees daytime highs around 31°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 69 days see rain.
UV index in São Simão in Summer
Clear-sky midday UV across summer averages around 15 (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 Simão peaks around January 24 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 7 (very 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) | 15 | 15 | 14 | 11 | 8 | 7 | 7 | 9 | 11 | 11 | 13 | 14 |
| Level | Extreme | Extreme | Extreme | Extreme | Very high | High | Very high | Very high | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 15 | Extreme |
| Feb | 15 | Extreme |
| Mar | 14 | Extreme |
| Apr | 11 | Extreme |
| May | 8 | Very high |
| Jun | 7 | High |
| Jul | 7 | Very high |
| Aug | 9 | Very high |
| Sep | 11 | Extreme |
| Oct | 11 | Extreme |
| Nov | 13 | Extreme |
| Dec | 14 | Extreme |
Air quality in São Simão in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in São Simão is worst in September — around 34 µg/m³ PM2.5 (moderate), about 6.1× the cleanest month (November, 6 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) | 8 | 8 | 8 | 6 | 6 | 6 | 7 | 14 | 34 | 13 | 6 | 6 |
| Level | Good | Good | Good | Good | Good | Good | Good | Moderate | Moderate | Moderate | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 8 | Good |
| Feb | 8 | Good |
| Mar | 8 | Good |
| Apr | 6 | Good |
| May | 6 | Good |
| Jun | 6 | Good |
| Jul | 7 | Good |
| Aug | 14 | Moderate |
| Sep | 34 | Moderate |
| Oct | 13 | Moderate |
| Nov | 6 | Good |
| Dec | 6 | Good |
Where is São Simão?
São Simão sits at 19.0°S, 50.5°W, 471 m above sea level, in Brazil. The nearest listed city is Santa Vitória, 48 km away.
Topography around São Simão
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of São Simão.
Within 3 km, the terrain around São Simão has only modest variations in elevation — a maximum elevation change of 106 m around an average of 449 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 208 m; within 80 km, significant variations in elevation — a maximum elevation change of 517 m.
The land around São Simão is covered by grassland (45%) and cropland (20%) within 3 km, cropland (40%) and grassland (35%) within 16 km, and cropland (50%) and grassland (30%) 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 Simão (-18.9911°, -50.5436°, elevation 471 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.