Cachoeira do Arari in Summer
In summer (December, January and February), Cachoeira do Arari sees average daytime highs around 31°C and overnight lows near 23°C, with 848 mm of rain over about 75 wet days across the season. It is the 3rd-warmest season and the 2nd-wettest season.
Over the season highs ease from about 33°C in early December to 30°C by late February. The sky is clear or mostly clear about 7% of the time across summer, and the air most often feels oppressive.
Summer is Cachoeira do Arari's 3rd-best season to visit on our travel score. For the whole year in context, see Cachoeira do Arari's year-round climate.
- Avg daytime high
- 31°C
- 3rd-warmest season
- Avg overnight low
- 23°C
- Rainfall
- 848 mm
- 75 wet days
- Avg wind
- 8 km/h
- Travel score
- 2.6
- 3rd-best season
- Months
- Dec · Jan · Feb
Temperature in Cachoeira do Arari in Summer
Over the season highs ease from about 33°C in early December to 30°C by late February.
A typical summer day in Cachoeira do Arari reaches about 31°C and drops to 23°C overnight. The warmest of the three months is December, the coolest February.
How summer really feels in Cachoeira do Arari
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.
Cachoeira do Arari 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° | 303 | 28.4 | 12.1 | 2.5 |
| Feb | 30° / 23° | 422 | 27.3 | 12 | 2.5 |
| Mar | 30° / 23° | 518 | 30.7 | 12 | 2.5 |
| Apr | 30° / 23° | 488 | 29.6 | 12 | 2.4 |
| May | 31° / 23° | 357 | 28 | 12 | 2.6 |
| Jun | 32° / 23° | 147 | 21.3 | 11.9 | 3.1 |
| Jul | 32° / 23° | 88 | 16.6 | 11.9 | 3.5 |
| Aug | 33° / 23° | 44 | 12.8 | 12 | 3.4 |
| Sep | 34° / 24° | 29 | 9.3 | 12 | 3.3 |
| Oct | 34° / 24° | 27 | 6.4 | 12 | 3.4 |
| Nov | 34° / 24° | 40 | 7.7 | 12 | 3.3 |
| Dec | 33° / 24° | 123 | 19 | 12.1 | 2.8 |
Cloud cover in Summer
The sky is clear or mostly clear about 7% of the time across summer.
Chance of precipitation in Summer
Cachoeira do Arari gets around 848 mm of rain over 75 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 8 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 12 h 06 min in early December to 12 hours 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.
Hazard calendar for Cachoeira do Arari
In summer, Cachoeira do Arari overlaps its monsoon season. The full year is below, with each hazard's peak months called out.
Cachoeira do Arari's monsoon runs January–May, when most of the year's rain falls.
Is summer a good time to visit Cachoeira do Arari?
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 Cachoeira do Arari.
What to pack for Cachoeira do Arari in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Cachoeira do Arari sees daytime highs around 31°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 75 days see rain.
Sea temperature near Cachoeira do Arari in Summer
The nearest coast averages about 29°C across summer — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 40 km away) is warmest in June at about 29°C and coldest in March near 28°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) | 29 | 28 | 28 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 |
| Comfort | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 29 | Tropical |
| Feb | 28 | Tropical |
| Mar | 28 | Tropical |
| Apr | 29 | Tropical |
| May | 29 | Tropical |
| Jun | 29 | Tropical |
| Jul | 29 | Tropical |
| Aug | 29 | Tropical |
| Sep | 29 | Tropical |
| Oct | 29 | Tropical |
| Nov | 29 | Tropical |
| Dec | 29 | Tropical |
UV index in Cachoeira do Arari in Summer
Clear-sky midday UV across summer averages around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Cachoeira do Arari peaks around March 14 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 24 at about 10 (extreme).
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) | 13 | 15 | 15 | 14 | 12 | 11 | 10 | 10 | 12 | 12 | 10 | 10 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 13 | Extreme |
| Feb | 15 | Extreme |
| Mar | 15 | Extreme |
| Apr | 14 | Extreme |
| May | 12 | Extreme |
| Jun | 11 | Extreme |
| Jul | 10 | Extreme |
| Aug | 10 | Extreme |
| Sep | 12 | Extreme |
| Oct | 12 | Extreme |
| Nov | 10 | Extreme |
| Dec | 10 | Extreme |
Air quality in Cachoeira do Arari 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 Cachoeira do Arari is worst in February — around 22 µg/m³ PM2.5 (moderate), about 2.8× the cleanest month (July, 8 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) | 18 | 22 | 22 | 17 | 11 | 9 | 8 | 9 | 11 | 13 | 13 | 14 |
| Level | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good | Good | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 18 | Moderate |
| Feb | 22 | Moderate |
| Mar | 22 | Moderate |
| Apr | 17 | Moderate |
| May | 11 | Good |
| Jun | 9 | Good |
| Jul | 8 | Good |
| Aug | 9 | Good |
| Sep | 11 | Good |
| Oct | 13 | Moderate |
| Nov | 13 | Moderate |
| Dec | 14 | Moderate |
Where is Cachoeira do Arari?
Cachoeira do Arari sits at 1.0°S, 49.0°W, 8 m above sea level, in Brazil. The nearest listed city is Ponta de Pedras, 43 km away.
Topography around Cachoeira do Arari
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Cachoeira do Arari.
Within 3 km, the terrain around Cachoeira do Arari has only modest variations in elevation — a maximum elevation change of 27 m around an average of 5 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 37 m; within 80 km, only modest variations in elevation — a maximum elevation change of 50 m.
The land around Cachoeira do Arari is covered by grassland (60%) within 3 km, grassland (72%) within 16 km, and grassland (37%), trees (34%) and water (20%) 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 Cachoeira do Arari (-1.0114°, -48.9633°, elevation 8 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.