Goiás in Summer
In summer (December, January and February), Goiás sees average daytime highs around 29°C and overnight lows near 21°C, with 769 mm of rain over about 74 wet days across the season. It is the coldest season of the year and the wettest season of the year.
Across summer, daytime highs hold fairly steady around 29°C. The sky is clear or mostly clear about 8% of the time across summer, and the air most often feels oppressive.
Summer is Goiás's 3rd-best season to visit on our travel score. For the whole year in context, see Goiás's year-round climate.
- Avg daytime high
- 29°C
- coldest season of the year
- Avg overnight low
- 21°C
- Rainfall
- 769 mm
- 74 wet days
- Avg wind
- 6 km/h
- Travel score
- 3.3
- 3rd-best season
- Months
- Dec · Jan · Feb
Temperature in Goiás in Summer
Across summer, daytime highs hold fairly steady around 29°C.
A typical summer day in Goiás reaches about 29°C and drops to 21°C overnight. The warmest of the three months is February, the coolest January.
How summer really feels in Goiás
Once humidity and wind are folded in, summer brings about 18 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.
Goiás 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 | 29° / 21° | 278 | 25.1 | 12.8 | 3.4 |
| Feb | 30° / 21° | 217 | 23 | 12.5 | 3.3 |
| Mar | 30° / 21° | 216 | 24.3 | 12.1 | 3.4 |
| Apr | 31° / 21° | 95 | 13.7 | 11.7 | 4.3 |
| May | 31° / 20° | 13 | 2.5 | 11.3 | 5.6 |
| Jun | 31° / 19° | 3 | 0.7 | 11.1 | 6.1 |
| Jul | 31° / 19° | 1 | 0.2 | 11.1 | 5.9 |
| Aug | 33° / 20° | 5 | 0.9 | 11.5 | 4.5 |
| Sep | 34° / 22° | 27 | 5.4 | 11.9 | 3.3 |
| Oct | 33° / 22° | 116 | 16.6 | 12.4 | 3.0 |
| Nov | 30° / 22° | 204 | 23.4 | 12.7 | 3.2 |
| Dec | 29° / 21° | 274 | 25.6 | 12.9 | 3.3 |
Cloud cover in Summer
The sky is clear or mostly clear about 8% of the time across summer.
Chance of precipitation in Summer
Goiás gets around 769 mm of rain over 74 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 6 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 12 h 54 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 5.3 kWh/m².
Hazard calendar for Goiás
In summer, Goiás overlaps its monsoon season. The full year is below, with each hazard's peak months called out.
Goiás's monsoon runs November–March, when most of the year's rain falls.
Is summer a good time to visit Goiás?
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 Goiás.
What to pack for Goiás in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Goiás sees daytime highs around 29°C and nights near 21°C. Pack light clothes and rain gear. Worth having: sun protection. About 74 days see rain.
UV index in Goiás 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 Goiás peaks around January 23 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 8 (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 | 12 | 9 | 8 | 8 | 10 | 12 | 13 | 13 | 14 |
| Level | Extreme | Extreme | Extreme | Extreme | Very high | Very high | Very high | Very high | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 15 | Extreme |
| Feb | 15 | Extreme |
| Mar | 14 | Extreme |
| Apr | 12 | Extreme |
| May | 9 | Very high |
| Jun | 8 | Very high |
| Jul | 8 | Very high |
| Aug | 10 | Very high |
| Sep | 12 | Extreme |
| Oct | 13 | Extreme |
| Nov | 13 | Extreme |
| Dec | 14 | Extreme |
Air quality in Goiás 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 Goiás is worst in September — around 22 µg/m³ PM2.5 (moderate), about 4.9× the cleanest month (July, 4 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 | 7 | 6 | 5 | 4 | 8 | 22 | 14 | 7 | 7 |
| Level | Good | Good | Good | Good | Good | Good | Good | Good | Moderate | Moderate | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 8 | Good |
| Feb | 8 | Good |
| Mar | 8 | Good |
| Apr | 7 | Good |
| May | 6 | Good |
| Jun | 5 | Good |
| Jul | 4 | Good |
| Aug | 8 | Good |
| Sep | 22 | Moderate |
| Oct | 14 | Moderate |
| Nov | 7 | Good |
| Dec | 7 | Good |
Where is Goiás?
Goiás sits at 15.9°S, 50.1°W, 496 m above sea level, in Brazil. The nearest listed city is Itaberaí, 37 km away.
Topography around Goiás
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Goiás.
Within 3 km, the terrain around Goiás has significant variations in elevation — a maximum elevation change of 402 m around an average of 556 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 676 m; within 80 km, large variations in elevation — a maximum elevation change of 858 m.
The land around Goiás is covered by trees (69%) within 3 km, trees (48%) and grassland (41%) within 16 km, and grassland (50%), trees (25%) and cropland (23%) 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 Goiás (-15.9344°, -50.1403°, elevation 496 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.