Arraial do Cabo Temperature by Month
Arraial do Cabo, Rio de Janeiro State, Brazil has a consistently comfortable climate year-round, with daytime highs averaging 25°C (77°F). Below you'll find a full monthly breakdown and a comparison with cities worldwide.
Arraial do Cabo Monthly Temperatures
The climate in Arraial do Cabo remains fairly constant, offering comfortable temperatures throughout the year. Maximum daytime temperatures reach a comfortable 27°C (81°F) in March, dropping to a comfortable 24°C (75°F) in August. Nighttime lows stay between 24°C (75°F) and 20°C (68°F).
The chart below illustrates the average maximum day and minimum night temperatures in Arraial do Cabo by month:
Daily lows are most common between 4 AM and 6 AM. By 3 PM temperatures reach their daily high, driven by peak solar heating.
The chart below shows the average temperature throughout the year:
Daily Historical Temperatures
40-year average (1976-2025)
Average high and low temperatures for each day of the month based on long-term records.
Average temperatures in May
Historical Arraial do Cabo Temperatures: 1976-2026
Browse day-by-day temperature records for Arraial do Cabo spanning 51 years. Select any month and year to see actual high and low temperatures recorded on each day.
Temperature: Arraial do Cabo vs Brazil
The map below shows the annual temperature across Brazil. You can also select individual months if you want to compare a specific time of year.
very warm
warm
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moderate
cold
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Arraial do Cabo vs World: Temperature Compared
Arraial do Cabo's average annual maximum temperature is 25°C (77°F). To put that in context, here's how it compares to a few well-known destinations:
Athens, Greece sits at 23°C (73°F) on average, with hot dry summers and mild winters characteristic of the Mediterranean.
Reykjavík, Iceland averages 9°C (48°F) a year — mild summers by Icelandic standards, but cold winters and frequent wind.
Seoul, South Korea averages 18°C (64°F) a year, with four clear seasons, cold winters, and hot humid summers.
Adelaide, Australia averages 21°C (70°F) a year, with warm summers, mild winters, and relatively low rainfall year-round.
What Does the Temperature Feel Like in Arraial do Cabo?
Temperature alone doesn't tell the whole story — humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.
In Arraial do Cabo, August is the coolest month, with average highs of 24°C (75°F) and humidity around 81% — considered very high. In March, the warmest month, temperatures average 27°C (81°F) with 82% humidity — conditions that feel very high. For a full picture, see our humidity page.
Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.
The readings come from a range of sources — land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.
Whether a city sits on the coast or deep inland makes a significant difference to its climate. Coastal areas tend to have more stable temperatures year-round — large bodies of water absorb heat slowly in summer and release it gradually in winter, keeping extremes in check. Cities far from the sea don't benefit from that buffer, which is why continental climates tend to have hotter summers and colder winters than their coastal counterparts at the same latitude.
For more on Arraial do Cabo's weather — including monthly rainfall, sunshine hours, and humidity — visit our Arraial do Cabo climate page.
