Santo Antônio do Içá in Summer
In summer (December, January and February), Santo Antônio do Içá sees average daytime highs around 30°C and overnight lows near 24°C, with 819 mm of rain over about 83 wet days across the season. It is the 2nd-warmest season and the 2nd-wettest season.
Across summer, daytime highs hold fairly steady around 30°C. The sky is clear or mostly clear about 2% of the time across summer, and the air most often feels miserable.
Summer is Santo Antônio do Içá's weakest season of the year to visit on our travel score. Santo Antônio do Içá 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 Santo Antônio do Içá's year-round climate.
- Avg daytime high
- 30°C
- 2nd-warmest season
- Avg overnight low
- 24°C
- Rainfall
- 819 mm
- 83 wet days
- Avg wind
- 4 km/h
- Travel score
- 2.7
- weakest season of the year
- Months
- Dec · Jan · Feb
Temperature in Santo Antônio do Içá in Summer
Across summer, daytime highs hold fairly steady around 30°C.
A typical summer day in Santo Antônio do Içá reaches about 30°C and drops to 24°C overnight. The warmest of the three months is December, the coolest December.
How summer really feels in Santo Antônio do Içá
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.
Santo Antônio do Içá 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 | 30° / 24° | 277 | 28.3 | 12.2 | 2.7 |
| Feb | 30° / 24° | 276 | 25.5 | 12.1 | 2.7 |
| Mar | 30° / 24° | 323 | 29.1 | 12 | 2.6 |
| Apr | 30° / 23° | 326 | 28.2 | 11.9 | 2.7 |
| May | 30° / 23° | 301 | 28.8 | 11.9 | 2.9 |
| Jun | 29° / 23° | 206 | 26.1 | 11.8 | 3.2 |
| Jul | 30° / 22° | 154 | 24.8 | 11.8 | 3.4 |
| Aug | 31° / 23° | 130 | 23.3 | 11.9 | 3.3 |
| Sep | 31° / 23° | 143 | 23 | 12 | 2.9 |
| Oct | 31° / 24° | 188 | 25.6 | 12.1 | 2.7 |
| Nov | 31° / 24° | 219 | 26.2 | 12.1 | 2.6 |
| Dec | 31° / 24° | 266 | 28.8 | 12.2 | 2.6 |
Cloud cover in Summer
The sky is clear or mostly clear about 2% of the time across summer.
Chance of precipitation in Summer
Santo Antônio do Içá gets around 819 mm of rain over 83 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 4 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 12 h 12 min in early December to 12 h 06 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 4.6 kWh/m².
Is summer a good time to visit Santo Antônio do Içá?
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 Santo Antônio do Içá.
What to pack for Santo Antônio do Içá in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Santo Antônio do Içá sees daytime highs around 30°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 83 days see rain.
UV index in Santo Antônio do Içá in Summer
Clear-sky midday UV across summer 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 Santo Antônio do Içá peaks around March 10 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 9 at about 10 (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 | 15 | 14 | 13 | 11 | 10 | 10 | 10 | 12 | 13 | 12 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high | Very high | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 15 | Extreme |
| Feb | 15 | Extreme |
| Mar | 15 | Extreme |
| Apr | 14 | Extreme |
| May | 13 | Extreme |
| Jun | 11 | Extreme |
| Jul | 10 | Very high |
| Aug | 10 | Very high |
| Sep | 10 | Very high |
| Oct | 12 | Extreme |
| Nov | 13 | Extreme |
| Dec | 12 | Extreme |
Air quality in Santo Antônio do Içá 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 Santo Antônio do Içá is worst in August — around 18 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (June, 9 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) | 14 | 15 | 16 | 13 | 10 | 9 | 11 | 18 | 16 | 13 | 13 | 12 |
| Level | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 14 | Moderate |
| Feb | 15 | Moderate |
| Mar | 16 | Moderate |
| Apr | 13 | Moderate |
| May | 10 | Good |
| Jun | 9 | Good |
| Jul | 11 | Good |
| Aug | 18 | Moderate |
| Sep | 16 | Moderate |
| Oct | 13 | Moderate |
| Nov | 13 | Moderate |
| Dec | 12 | Moderate |
Where is Santo Antônio do Içá?
Santo Antônio do Içá sits at 3.1°S, 67.9°W, 68 m above sea level, in Brazil. The nearest listed city is Tonantins, 30 km away.
Topography around Santo Antônio do Içá
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Santo Antônio do Içá.
Within 3 km, the terrain around Santo Antônio do Içá has only modest variations in elevation — a maximum elevation change of 61 m around an average of 65 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 73 m; within 80 km, only modest variations in elevation — a maximum elevation change of 92 m.
The land around Santo Antônio do Içá is covered by trees (52%) and water (38%) within 3 km, trees (82%) within 16 km, and trees (96%) 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 Santo Antônio do Içá (-3.1022°, -67.9397°, elevation 68 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.