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Cabo Frio Weather in September
During September, Cabo Frio experiences high daytime temperatures of 25°C (77°F) and cooler nights around 20°C (68°F). Some rainfall is typical during this period.
Rainfall in Cabo Frio in September
Based on our climate data of the past 30 years, about 12 days of rain are anticipated, with 59 mm (2.3 in) on average. A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.
Temperature in Cabo Frio in September
Cabo Frio has excellent weather in September, with days reaching 25°C (77°F) and nights cooling to 20°C (68°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. Nights are mild at around 20°C (68°F), which is comfortable for most people.If you favor pleasant temperatures and minimal rainfall, September is one of the best months to visit Cabo Frio.
Cabo Frio Temperature in September
Min Temperature
20°C (68°F)
Max Temperature
25°C (77°F)
Chance of Rain
41%
Precipitation
59 mm (2.3 in)
Rainy days
12 days
Humidity
81%
Cabo Frio Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Cabo Frio - and find the best time to visit.
Daily Historical Temperatures
43-year average (1976-2026)
Based on our historical records, temperatures in Cabo Frio typically stay consistent throughout September, with daily highs averaging around 25°C (77°F). Nights are pleasant, with lows around 18°C (64°F).
Average temperatures in September
Historical weather records for Cabo Frio in September
Browse day-by-day weather records for Cabo Frio spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Cabo Frio historical weather extremes in September
Our historical data for Cabo Frio spans 2005 to 2026, revealing these weather extremes.
- Cabo Frio recorded its highest September temperature of 36°C (97°F) on September 4, 2008.
- The coldest September day was on September 27, 2005, with a maximum of 14°C (57°F).
- Cabo Frio registered its coldest September night on September 6, 2006, with temperatures dropping to 4°C (39°F).
Best Places in Brazil in September
Find out more about the weather in Brazil and which places have the best travel conditions in this month. See all of Brazil in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Cabo Frio in September
Comfortable temperatures call for an easy wardrobe in September. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Wet weather is likely, so pack waterproof gear for multiple rainy days.
What To Do in Cabo Frio in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling10/10 -
Walking10/10 -
Camping8/10 -
Outdoor sports10/10
Cabo Frio 3-Day Forecast
More climate data for Cabo Frio
See the full Cabo Frio climate overview or explore weather in Brazil.
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