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Boa Vista Weather in May
Boa Vista in May averages 31°C (88°F) during the day and 24°C (75°F) at night. This is the wettest month of the year.
Rainfall in Boa Vista in May
As part of the rainy season, Boa Vista sees around 23 days of rain in May, with an average of 366 mm (14 in). With high rainfall totals spread across the month, individual showers can be very heavy. Waterproof gear is strongly recommended.
Temperature in Boa Vista in May
Expect highs of 31°C (88°F) in Boa Vista in May, with nights dropping to around 24°C (75°F). The hottest part of the day is usually in the afternoon, so lighter clothing can help you stay comfortable. Nights are warm at 24°C (75°F). It's worth making sure your accommodation has decent ventilation or air conditioning.
Sunshine in Boa Vista in May
The area enjoys a moderate level of sunlight, with around 139 hours. It's a good balance between sunny and rainy days.May in Boa Vista has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.
Boa Vista Temperature in May
Min Temperature
24°C (75°F)
Max Temperature
31°C (88°F)
Chance of Rain
77%
Precipitation
366 mm (14 in)
Rainy days
23 days
Humidity
79%
Sunshine
139 hours
Percentage Sunshine
Boa Vista Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Boa Vista - and find the best time to visit.
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Boa Vista typically stay consistent throughout May, with daily highs averaging around 31°C (88°F). Nights are warm, with lows around 24°C (75°F).
Average temperatures in May
Daily Historical Precipitation
49-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather records for Boa Vista in May
Browse day-by-day weather records for Boa Vista spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Boa Vista historical weather extremes in May
Our historical data for Boa Vista spans 1982 to 2026, revealing these weather extremes.
- The hottest May day on record in Boa Vista reached 36°C (97°F) (May 6, 1988).
- On May 30, 2016, Boa Vista saw its coldest May day with temperatures maxing out at 24°C (75°F).
- Nighttime temperatures dropped to 19°C (66°F) on May 29, 1983, marking the coldest May night on record.
Best Places in Brazil in May
Find out more about the weather in Brazil and which places have the best travel conditions in this month. See all of Brazil in May →
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 Boa Vista in May
Warm but pleasant conditions in Boa Vista in May. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. It's going to pour! Pack a good poncho and prepare for very wet conditions. Sunglasses could come in handy during the sunnier parts of your trip.
What To Do in Boa Vista in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming7/10 -
Cycling7/10 -
Walking7/10 -
Camping6/10 -
Outdoor sports7/10
Boa Vista 3-Day Forecast
More climate data for Boa Vista
Temperature Rainfall Sunshine Humidity
See the full Boa Vista climate overview or explore weather in Brazil.
Popular in May
Where to go in May - average daytime high across popular destinations.
Fortaleza
31°C (88°F) Salvador
28°C (82°F) Rio de Janeiro
27°C (81°F) Búzios
26°C (79°F) Sao Paulo24°C (75°F) Paraty24°C (75°F) Florianópolis23°C (73°F) Gramado21°C (70°F) Bucket list
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