Coari in Summer
In summer (December, January and February), Coari sees average daytime highs around 30°C and overnight lows near 25°C, with 816 mm of rain over about 82 wet days across the season. It is the 3rd-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 1% of the time across summer, and the air most often feels miserable.
Summer is Coari's 3rd-best season to visit on our travel score. Coari 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 Coari's year-round climate.
- Avg daytime high
- 30°C
- 3rd-warmest season
- Avg overnight low
- 25°C
- Rainfall
- 816 mm
- 82 wet days
- Avg wind
- 5 km/h
- Travel score
- 2.7
- 3rd-best season
- Months
- Dec · Jan · Feb
Temperature in Coari in Summer
Across summer, daytime highs hold fairly steady around 30°C.
A typical summer day in Coari reaches about 30°C and drops to 25°C overnight. The warmest of the three months is December, the coolest January.
How summer really feels in Coari
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.
Coari 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° / 25° | 285 | 28 | 12.2 | 2.8 |
| Feb | 30° / 25° | 275 | 25.2 | 12.1 | 2.8 |
| Mar | 30° / 25° | 334 | 28.7 | 12 | 2.7 |
| Apr | 30° / 25° | 335 | 28.6 | 11.9 | 2.7 |
| May | 30° / 24° | 297 | 29.1 | 11.8 | 2.8 |
| Jun | 30° / 24° | 167 | 25.3 | 11.8 | 3.2 |
| Jul | 30° / 24° | 101 | 20.5 | 11.8 | 3.8 |
| Aug | 31° / 25° | 96 | 18.6 | 11.9 | 3.6 |
| Sep | 32° / 25° | 123 | 21.5 | 12 | 3.0 |
| Oct | 31° / 25° | 163 | 24.7 | 12.1 | 2.8 |
| Nov | 31° / 25° | 211 | 25.7 | 12.2 | 2.7 |
| Dec | 30° / 25° | 256 | 29 | 12.2 | 2.6 |
Cloud cover in Summer
The sky is clear or mostly clear about 1% of the time across summer.
Chance of precipitation in Summer
Coari gets around 816 mm of rain over 82 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 5 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 4.5 kWh/m².
Is summer a good time to visit Coari?
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 Coari.
What to pack for Coari in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Coari sees daytime highs around 30°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 82 days see rain.
UV index in Coari 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 Coari peaks around March 14 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 13 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 | 14 | 15 | 14 | 12 | 10 | 10 | 11 | 10 | 11 | 12 | 12 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Extreme | Very high | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 15 | Extreme |
| Feb | 14 | Extreme |
| Mar | 15 | Extreme |
| Apr | 14 | Extreme |
| May | 12 | Extreme |
| Jun | 10 | Extreme |
| Jul | 10 | Very high |
| Aug | 11 | Extreme |
| Sep | 10 | Very high |
| Oct | 11 | Extreme |
| Nov | 12 | Extreme |
| Dec | 12 | Extreme |
Air quality in Coari 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 Coari is worst in September — around 25 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (June, 11 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) | 15 | 15 | 16 | 14 | 11 | 11 | 12 | 23 | 25 | 21 | 19 | 17 |
| Level | Moderate | Moderate | Moderate | Moderate | Good | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 15 | Moderate |
| Feb | 15 | Moderate |
| Mar | 16 | Moderate |
| Apr | 14 | Moderate |
| May | 11 | Good |
| Jun | 11 | Good |
| Jul | 12 | Moderate |
| Aug | 23 | Moderate |
| Sep | 25 | Moderate |
| Oct | 21 | Moderate |
| Nov | 19 | Moderate |
| Dec | 17 | Moderate |
Where is Coari?
Coari sits at 4.1°S, 63.1°W, 42 m above sea level, in Brazil. The nearest listed city is Codajás, 123 km away.
Topography around Coari
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Coari.
Within 3 km, the terrain around Coari has only modest variations in elevation — a maximum elevation change of 43 m around an average of 30 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 58 m; within 80 km, only modest variations in elevation — a maximum elevation change of 70 m.
The land around Coari is covered by water (46%) and trees (33%) within 3 km, trees (64%) and water (30%) within 16 km, and trees (87%) 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 Coari (-4.085°, -63.1414°, elevation 42 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.