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Arraial do Cabo Weather in September
September in Arraial do Cabo averages 24°C (75°F) during the day and 21°C (70°F) at night. The excellent conditions and moderate rainfall make it a solid month to visit.
Rainfall in Arraial do Cabo in September
Historically, the month has about 12 days of rain, averaging 56 mm (2.2 in) in total. Expect a fairly normal spread of rainfall this month, with no particular pattern of very heavy or very persistent showers.
Temperature in Arraial do Cabo in September
September is a good time to be in Arraial do Cabo. Days are excellent, reaching 24°C (75°F), with nights around 21°C (70°F). This kind of day-to-night contrast is typical for this time of year. Nights remain mild at 21°C (70°F), making evenings a pleasant time to be outdoors.If you're inclined towards comfortable temperatures and drier conditions, September is a good time to visit Arraial do Cabo.
Arraial do Cabo Temperature in September
Min Temperature
21°C (70°F)
Max Temperature
24°C (75°F)
Chance of Rain
41%
Precipitation
56 mm (2.2 in)
Rainy days
12 days
Humidity
81% *
* Data from: Cabo Frio, Brazil (9 KM, 5 Miles).
Arraial do Cabo Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Arraial do Cabo - and find the best time to visit.
Daily Historical Temperatures
43-year average (1976-2026)
Based on our historical records, temperatures in Arraial do Cabo typically stay consistent throughout September, with daily highs averaging around 24°C (75°F). Nights are pleasant, with lows around 18°C (64°F).
Average temperatures in September
Historical weather records for Arraial do Cabo in September
Browse day-by-day weather records for Arraial do Cabo spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Arraial do Cabo historical weather extremes in September
According to our 21 years of weather records for Arraial do Cabo, the following extremes were recorded between 2005 and 2026.
- The hottest September day on record in Arraial do Cabo reached 36°C (97°F) (September 4, 2008).
- Arraial do Cabo experienced its chilliest September day on September 27, 2005, reaching only 14°C (57°F).
- The lowest overnight temperature recorded in September was 4°C (39°F) (September 6, 2006).
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 Arraial do Cabo in September
Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Rain gear is recommended, you can expect wet weather on multiple days.
What To Do in Arraial do Cabo 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
Arraial do Cabo 3-Day Forecast
More climate data for Arraial do Cabo
See the full Arraial do Cabo climate overview or explore weather in Brazil.
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