Climate and monthly weather forecast
Boa Vista, Brazil

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The climate of Boa Vista

Located in the heart of the Amazon, the city of Boa Vista in Brazil experiences a predominately Am climate, according to the Köppen Climate classification. A key characteristic of this tropical monsoon climate is high temperatures and significant rainfall all through the year.

Throughout the twelve months, the city experiences a narrow range of temperature variation, with average highs oscillating between 29.8°C (85.6°F) and 34.7°C (94.5°F), while the lows hardly fall below 22.1°C (71.8°F), reaching up to 24.9°C (76.8°F). Relative humidity values remain in the moderate range, recorded between 57% and 84%.

When it comes to precipitations, Boa Vista experiences a pronounced pattern: the drier months, with rainfall around 19mm (0.75") to 42mm (1.65"), typically happen between December to March, while April to November presents a drastic increase in rainfall, reaching the highest point at 225mm (8.86") in June. It is interesting to observe that the number of rainfall days also peaks in June with 29.3 days, while the drier months see between 10 and 14.9 days of rain.

To complete the picture, it is worth noting that annual values of UV index sit at level 7. Despite persistent cloud cover, sunshine hours reach up to 10.2 hours in September, while the least sunlit months are June to July, dipping to 7.9 hours. Wind speed displays a consistent pattern, average values residing between 5.5km/h (3.4mph) and 13km/h (8.1mph), with gusts peaking at 18.5km/h (11.5mph).

The best time to visit Boa Vista

Boa Vista’s best visiting period would be during the drier months between December and March. This time of the year, visitors can enjoy pleasant temperatures, fewer rainy days and more sunshine hours. The UV index remains at level 7, therefore, ensuring sun protection during outdoor activities remains crucial.

The worst time to visit Boa Vista

The wettest period in Boa Vista, from April to November, might not be the most favorable time for a visit. This period is characterized by high humidity, reduced visibility due to increased rainfall and fewer sunshine hours.

Spring weather in Boa Vista

Spring in Boa Vista corresponds to September through November. Average high and low temperatures during this period hover between 30°C (86°F) to 34°C (93.2°F) and 23.1°C (73.6°F) to 24.2°C (75.6°F), respectively. Rainfall starts to increase from 89mm (3.5") in September to 76mm (2.99") in November, and relative humidity ranges from 68% to 72%.

Summer weather in Boa Vista

The summer months of December through February in Boa Vista feature high temperatures, remaining approximately between 33.8°C (92.8°F) and 34°C (93.2°F). Nights typically cool down to between 24.3°C (75.7°F) and 24.6°C (76.3°F). Rainfall is lowest during this period, falling between 19mm (0.75") and 29mm (1.14"), with between 10 and 11.9 rainfall days.

Autumn weather in Boa Vista

In Autumn (March through May), Boa Vista temperatures start to decrease slightly, with high temperatures averaging from 30.8°C (87.4°F) to 33.1°C (91.6°F), and low temperatures resting between 22.7°C (72.9°F) and 24.3°C (75.7°F). Rainfall picks up significantly this season, peaking at 215mm (8.46") in May. This period also sees a sharp increase in relative humidity and a drop in sunshine hours.

Winter weather in Boa Vista

The Winter season from June to August in Boa Vista is dominated by high rainfall, with amounts peaking at 225mm (8.86"). High temperatures range between 29.8°C (85.6°F) and 30°C (86°F) and low temperatures, from 22.1°C (71.8°F) to 23°C (73.4°F). During this period, the city witnesses its highest relative humidity at 84%. The UV index drops to 6, the lowest point of the year. Despite lesser sunshine hours, the weather remains tropical and warm.

Weather in January

Boa Vista's New Year begins with moderately high temperatures, as it observed in January. As one of the hotter months, the highest temperature reaches up to 33.8°C (92.8°F) and the city experiences humidity of 59%. Notably, there's a moderate level of rainfall at 19mm (0.75"). Weather in January »

Weather in February

Moving into February, the weather in Boa Vista remains fairly consistent. With a slight increase in rainfall, the city experiences a visible change in the weather. The highest temperature rises to 34°C (93.2°F) along with a small increase in the cloud coverage, standing at 35%. Weather in February »

Weather in March

March in Boa Vista shows signs of the upcoming wet season. There's also a slight surge of heat in this month, with the highest temperature reaching 34.7°C (94.5°F). With increased rainfall and humidity, the city experiences its first significant weather shift of the year. Weather in March »

Weather in April

April signifies a pivotal shift for Boa Vista weather patterns. It ushers in the peak of the rainfall season, with precipitation climbing dramatically up to 85mm (3.35"). The higher amount of rain also impacts the visibility, reducing it to 9km (5.6mi). Weather in April »

Weather in May

May weather in Boa Vista is marked by the highest level of rainfall in the year, skyrocketing to 215mm (8.46"). This heavy rainfall lends a substantially cooler feel to the city, making it one of the most humid months. Despite the reduced sunshine hours, daylight remains fairly constant. Weather in May »

Weather in June

June demonstrates a continuation of the wet season in Boa Vista, marked by heavy rains and lower temperatures. While the rainfall dips slightly down to 225mm (8.86"), the reduced wind gusts complement this humid period. The cooler temperatures go hand in hand with higher pressure levels. Weather in June »

Weather in July

Boa Vista's weather takes a slight turn in July. Although rainfall remains high at 204mm (8.03"), you will notice the mercury levels pushing back up to 30°C (86°F). The lower wind gusts, which go down to 9.1km/h (5.7mph), signpost the calming of the heavy rain period. Weather in July »

Weather in August

August brings a more visually clear weather pattern to Boa Vista. Rainfall drops to a lower 137mm (5.39"), and the humidity decreases, creating a more temperate atmosphere. Even though the temperature rises to 31.5°C (88.7°F), the cooler low wind speeds offer balance. Weather in August »

Weather in September

Shifting into September, Boa Vista's weather pattern continues to maintain a balanced phase. With rainfall reducing significantly to 89mm (3.5"), the city welcomes more sunshine hours up to 10.2 hours per day. The predominant warmth still lingers, but cooler winds signify the onset of the dry season. Weather in September »

Weather in October

The weather during October continues to stabilize in Boa Vista. The dry season takes full effect with rainfall down to only 71mm (2.8"). Respectable high temperatures persist, but the wind speeds give a cooler sensation. The decrease in rainfall also corresponds with higher visibility, making the city a breathtaking sight. Weather in October »

Weather in November

Come November, Boa Vista's weather patterns start transitioning back to its hotter trends. With a lower rainfall of 76mm (2.99"), the city experiences a drier spell. The return of hotter weather can be seen with a resurgence of temperatures near the 33.7°C (92.7°F) mark. Weather in November »

Weather in December

Closing out the year, December brings a warm, moderate climate to Boa Vista. The temperature reaches up to 33.2°C (91.8°F) which makes for a warm end of the year. An increase in wind speed back to 11.1km/h (6.9mph) signifies a return to normal climatic conditions. Weather in December »
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Frequently asked questions

What is the driest month in Boa Vista?

January is the month with the least rainfall in Boa Vista, Brazil. Rain falls for 10.8 days and accumulates 19mm (0.75") of precipitation.

How many days does it rain in Boa Vista?

Throughout the year, there are 241.8 rainfall days, and 1216mm (47.87") of precipitation is accumulated.

What are the months with the highest UV index in Boa Vista?

The months with the highest UV index in Boa Vista, Brazil, are January through May, July through December, with an average maximum UV index of 7.

What is the warmest month in Boa Vista?

In Boa Vista, Brazil, the peak temperatures are generally noted in March, averaging a high of 34.7°C (94.5°F) and a low of 24.9°C (76.8°F).

What is the least humid month in Boa Vista?

The least humid month in Boa Vista, Brazil, is March, with an average relative humidity of 57%.

What part of the year is the coldest in Boa Vista?

In Boa Vista, Brazil, the lowest temperatures are generally noted in June, averaging a high of 29.8°C (85.6°F) and a low of 22.7°C (72.9°F).

What is the most humid month in Boa Vista?

June and July, with an average relative humidity of 84%, are most humid months in Boa Vista, Brazil.

What is the rainiest month in Boa Vista?

June is the month with the most rainfall. Rain falls for 28.8 days and accumulates 225mm (8.86") of precipitation.

When are the longest days in Boa Vista?

June has the longest days of the year, with an average of 12h and 18min of daylight.

When is the lowest UV index in Boa Vista?

June is the month with the lowest UV index in Boa Vista, with an average maximum UV index of 6.

What is the month with the least sunshine in Boa Vista?

The month with the least sunshine in Boa Vista, Brazil, is July, with an average of 7.9h of sunshine.

What month has the most sunshine in Boa Vista?

September has the most sunshine of the year, with an average of 10.2h of sunshine.

What is the month with the shortest days in Boa Vista?

December has the shortest days of the year in Boa Vista, with an average of 12h and 0min of daylight.

Is there Daylight Saving Time (DST) in Boa Vista?

Boa Vista does not utilize Daylight Saving Time (DST). -04 timezone is used throughout the entire year.

Average pressure
Boa Vista, Brazil

Average pressure - Boa Vista, Brazil

The month with the highest atmospheric pressure is July (1012.9mbar).
The month with the lowest atmospheric pressure is November (1008.4mbar).

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Average wind speed
Boa Vista, Brazil

Average wind speed - Boa Vista, Brazil

The windiest month (with the highest average wind speed) is February (13km/h).
The calmest month (with the lowest average wind speed) is July (5.5km/h).

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Average humidity
Boa Vista, Brazil

Average humidity - Boa Vista, Brazil

The months with the highest relative humidity are June and July (84%).
The month with the lowest relative humidity is March (57%).

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Average rainfall
Boa Vista, Brazil

Average rainfall - Boa Vista, Brazil

The wettest month (with the highest rainfall) is June (225mm).
The driest month (with the least rainfall) is January (19mm).

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Average rainfall days
Boa Vista, Brazil

Average rainfall days - Boa Vista, Brazil

The month with the highest number of rainy days is July (29.3 days).
The month with the least rainy days is February (10 days).

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Average daylight / Average sunshine
Boa Vista, Brazil

Average daylight / Average sunshine - Boa Vista, Brazil

The month with the longest days is June (Average daylight: 12h and 18min).
The month with the shortest days is December (Average daylight: 12h and 0min).

The month with the most sunshine is September (Average sunshine: 10h and 12min).
The month with the least sunshine is July (Average sunshine: 7h and 54min).

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Average sunshine days
Boa Vista, Brazil

Average sunshine days - Boa Vista, Brazil

The month with the most sunshine days is March (18.3 days).
The month with the least sunshine days is June (0.9 days).

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Average UV index
Boa Vista, Brazil

Average UV index - Boa Vista, Brazil

The months with the highest UV index are January, February, March, April, May, July, August, September, October, November and December (UV index 7).
The month with the lowest UV index is June (UV index 6).

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Average visibility
Boa Vista, Brazil

Average visibility - Boa Vista, Brazil

The months with the highest visibility are January, February, March, October and December (10km).
The months with the lowest visibility are May, June and July (8km).

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Boa Vista, Brazil

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