Cabo Frio in Summer
In summer (December, January and February), Cabo Frio sees average daytime highs around 25°C and overnight lows near 24°C, with 236 mm of rain over about 24 wet days across the season. It is the warmest season of the year and the wettest season of the year.
Across summer, daytime highs hold fairly steady around 25°C. The sky is clear or mostly clear about 36% of the time across summer, and the air most often feels oppressive.
Summer is Cabo Frio's 2nd-best season to visit on our travel score. Cabo Frio 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 Cabo Frio's year-round climate.
- Avg daytime high
- 25°C
- warmest season of the year
- Avg overnight low
- 24°C
- Rainfall
- 236 mm
- 24 wet days
- Avg wind
- 22 km/h
- Travel score
- 7.1
- 2nd-best season
- Months
- Dec · Jan · Feb
Temperature in Cabo Frio in Summer
Across summer, daytime highs hold fairly steady around 25°C.
A typical summer day in Cabo Frio reaches about 25°C and drops to 24°C overnight. The warmest of the three months is February, the coolest December.
Cabo Frio 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 | 25° / 24° | 88 | 8.3 | 13.2 | 7.1 |
| Feb | 26° / 24° | 52 | 6 | 12.8 | 7.3 |
| Mar | 26° / 24° | 105 | 11 | 12.2 | 6.7 |
| Apr | 25° / 24° | 57 | 9.5 | 11.5 | 7.2 |
| May | 24° / 22° | 58 | 10.1 | 10.9 | 7.3 |
| Jun | 23° / 21° | 34 | 6.4 | 10.6 | 7.8 |
| Jul | 22° / 21° | 35 | 6.6 | 10.7 | 7.7 |
| Aug | 22° / 21° | 28 | 6.1 | 11.2 | 7.7 |
| Sep | 22° / 21° | 47 | 7.1 | 11.9 | 7.4 |
| Oct | 23° / 21° | 54 | 7.7 | 12.5 | 7.2 |
| Nov | 24° / 22° | 101 | 10.6 | 13.1 | 6.7 |
| Dec | 25° / 23° | 96 | 9.7 | 13.4 | 6.9 |
Cloud cover in Summer
The sky is clear or mostly clear about 36% of the time across summer.
Chance of precipitation in Summer
Cabo Frio gets around 236 mm of rain over 24 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 22 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 13 h 18 min in early December to 12 h 30 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 6.6 kWh/m².
Is summer a good time to visit Cabo Frio?
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 one of the better times to visit Cabo Frio for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Cabo Frio in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Cabo Frio sees daytime highs around 25°C and nights near 24°C. Pack sun protection. Worth having: light clothes, rain gear and a windbreaker. About 24 days see rain.
Sea temperature near Cabo Frio in Summer
The nearest coast averages about 24°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 16 km away) is warmest in March at about 25°C and coldest in September near 21°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) | 24 | 24 | 25 | 25 | 24 | 23 | 22 | 22 | 21 | 22 | 23 | 24 |
| Comfort | Warm | Warm | Warm | Warm | Refreshing | Refreshing | Refreshing | Refreshing | Refreshing | Refreshing | Refreshing | Refreshing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 24 | Warm |
| Feb | 24 | Warm |
| Mar | 25 | Warm |
| Apr | 25 | Warm |
| May | 24 | Refreshing |
| Jun | 23 | Refreshing |
| Jul | 22 | Refreshing |
| Aug | 22 | Refreshing |
| Sep | 21 | Refreshing |
| Oct | 22 | Refreshing |
| Nov | 23 | Refreshing |
| Dec | 24 | Refreshing |
UV index in Cabo Frio 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 Cabo Frio peaks around January 15 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 at about 5 (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) | 14 | 13 | 12 | 9 | 7 | 6 | 5 | 8 | 7 | 11 | 13 | 13 |
| Level | Extreme | Extreme | Extreme | Very high | High | High | High | Very high | High | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 14 | Extreme |
| Feb | 13 | Extreme |
| Mar | 12 | Extreme |
| Apr | 9 | Very high |
| May | 7 | High |
| Jun | 6 | High |
| Jul | 5 | High |
| Aug | 8 | Very high |
| Sep | 7 | High |
| Oct | 11 | Extreme |
| Nov | 13 | Extreme |
| Dec | 13 | Extreme |
Where is Cabo Frio?
Cabo Frio sits at 22.9°S, 42.0°W, 13 m above sea level, in Brazil. The nearest listed city is Arraial do Cabo, 9.0 km away.
Topography around Cabo Frio
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Cabo Frio.
Within 3 km, the terrain around Cabo Frio has only modest variations in elevation — a maximum elevation change of 100 m around an average of 5 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 375 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,806 m.
The land around Cabo Frio is covered by water (44%) and artificial surfaces (35%) within 3 km, water (61%) within 16 km, and water (51%), trees (26%) and grassland (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 Cabo Frio (-22.8872°, -42.0262°, elevation 13 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.