Climate - Boa Vista (Brazil)

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Boa Vista's climate is tropical, hot all year round, with a rainy season from May to August and a dry season from October to March.
The city is the capital of the state of Roraima and is located in the extreme north of Brazil, at 2 degrees north latitude, on the banks of the Branco River. We are in an area, on the border with Venezuela and Guyana, covered by the savannah and not by the forest, because the dry season is long. Furthermore, we are in the small area of Brazil north of the equator, where the dry season corresponds to the winter of the northern hemisphere.

Boa Vista - Climate data

The average temperature of the coldest month (July) is of 27.5 °C (81.5 °F), that of the warmest month (October) is of 29.7 °C (85.4 °F). Here are the average temperatures.
Precipitation amounts to 1650 millimeters (65 inches) per year: it is therefore abundant. It ranges from 20 mm (0.8 in) in the driest months (January, February) to 360 mm (14.2 in) in the wettest one (June). Here is the average precipitation.
On average, there are around 1895 sunshine hours per year. Here are the average sunshine hours per day.

Boa Vista - Weather by month

Based on the period 1991-2020

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In January, the weather in Boa Vista is usually very hot. The average temperature is of 28.9 °C (84 °F), with a minimum of 24.3 °C (75.8 °F) and a maximum of 33.4 °C (92.2 °F).
On the coldest nights of the month, the temperature usually drops to around 22 °C (72 °F). However, it dropped to 20.6 °C (69.1 °F) in January 1995.
On the warmest days of the month, the temperature usually reaches around 35.5 °C (95.5 °F). However, it reached 38 °C (100.4 °F) in January 2006.
Precipitation amounts to 20 mm (0.8 in), distributed over 5 days.
The day lasts on average 12 hours and 0 minutes.
There are on average 5.5 sunshine hours per day. So, the sun shines 48% of the time.
The average humidity is 62%.
The average wind speed is 17 kph (11 mph).

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In February, the weather in Boa Vista is usually very hot. The average temperature is of 29.0 °C (84 °F), with a minimum of 24.4 °C (76 °F) and a maximum of 33.6 °C (92.5 °F).
On the coldest nights of the month, the temperature usually drops to around 22 °C (71.5 °F). However, it dropped to 21 °C (69.8 °F) in February 2005.
On the warmest days of the month, the temperature usually reaches around 35.5 °C (95.5 °F). However, it reached 39.4 °C (102.9 °F) in February 1998.
Precipitation amounts to 20 mm (0.8 in), distributed over 3 days.
The day lasts on average 12 hours and 0 minutes.
There are on average 5.5 sunshine hours per day. So, the sun shines 44% of the time.
The average humidity is 61%.
The average wind speed is 18 kph (11 mph).

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In March, the weather in Boa Vista is usually very hot. The average temperature is of 29.5 °C (85 °F), with a minimum of 24.9 °C (76.8 °F) and a maximum of 34.1 °C (93.4 °F).
On the coldest nights of the month, the temperature usually drops to around 22 °C (72 °F). However, it dropped to 21.6 °C (70.9 °F) in March 2000.
On the warmest days of the month, the temperature usually reaches around 36 °C (97 °F). However, it reached 38.2 °C (100.8 °F) in March 1998.
Precipitation amounts to 50 mm (2 in), distributed over 4 days.
The day lasts on average 12 hours and 5 minutes.
There are on average 4.5 sunshine hours per day. So, the sun shines 38% of the time.
The average humidity is 59%.
The average wind speed is 17 kph (11 mph).

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In April, the weather in Boa Vista is usually very hot. The average temperature is of 29.1 °C (84 °F), with a minimum of 24.7 °C (76.5 °F) and a maximum of 33.6 °C (92.4 °F).
On the coldest nights of the month, the temperature usually drops to around 22 °C (71.5 °F). However, it dropped to 20.9 °C (69.6 °F) in April 2004.
On the warmest days of the month, the temperature usually reaches around 36 °C (96.5 °F). However, it reached 37.2 °C (99 °F) in April 2001.
Precipitation amounts to 130 mm (5.1 in), distributed over 9 days.
The day lasts on average 12 hours and 10 minutes.
There are on average 4.5 sunshine hours per day. So, the sun shines 35% of the time.
The average humidity is 67%.
The average wind speed is 14 kph (9 mph).

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In May, the weather in Boa Vista is usually very hot. The average temperature is of 28.1 °C (83 °F), with a minimum of 24.1 °C (75.4 °F) and a maximum of 32 °C (89.7 °F).
On the coldest nights of the month, the temperature usually drops to around 22 °C (72 °F). However, it dropped to 20 °C (68 °F) in May 2014.
On the warmest days of the month, the temperature usually reaches around 34.5 °C (94 °F). However, it reached 36.4 °C (97.5 °F) in May 1996.
Precipitation amounts to 270 mm (10.6 in), distributed over 19 days.
The day lasts on average 12 hours and 10 minutes.
There are on average 4.5 sunshine hours per day. So, the sun shines 37% of the time.
The average humidity is 76%. Hence, the air is normally humid.
The average wind speed is 10 kph (6 mph).

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In June, the weather in Boa Vista is usually very hot. The average temperature is of 27.6 °C (82 °F), with a minimum of 23.8 °C (74.8 °F) and a maximum of 31.5 °C (88.7 °F).
On the coldest nights of the month, the temperature usually drops to around 22 °C (71.5 °F). However, it dropped to 20.5 °C (68.9 °F) in June 2001.
On the warmest days of the month, the temperature usually reaches around 33.5 °C (92.5 °F). However, it reached 36 °C (96.8 °F) in June 1992.
Precipitation amounts to 360 mm (14.2 in), distributed over 19 days.
The day lasts on average 12 hours and 20 minutes.
There are on average 3 sunshine hours per day. So, the sun shines 25% of the time.
The average humidity is 79%. Hence, the air is normally humid.
The average wind speed is 8 kph (5 mph).

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In July, the coldest month of the year, the weather in Boa Vista is usually warm to hot. The average temperature is of 27.5 °C (81 °F), with a minimum of 23.6 °C (74.4 °F) and a maximum of 31.4 °C (88.6 °F).
On the coldest nights of the month, the temperature usually drops to around 21 °C (70 °F). However, it dropped to 19.9 °C (67.8 °F) in July 2000.
On the warmest days of the month, the temperature usually reaches around 34 °C (93 °F). However, it reached 36 °C (96.8 °F) in July 2008.
Precipitation amounts to 330 mm (13 in), distributed over 20 days.
The day lasts on average 12 hours and 20 minutes.
There are on average 4.5 sunshine hours per day. So, the sun shines 36% of the time.
The average humidity is 79%. Hence, the air is normally humid.
The average wind speed is 7 kph (5 mph).

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In August, the weather in Boa Vista is usually very hot. The average temperature is of 28.3 °C (83 °F), with a minimum of 24 °C (75.1 °F) and a maximum of 32.6 °C (90.7 °F).
On the coldest nights of the month, the temperature usually drops to around 21.5 °C (71 °F). However, it dropped to 19.2 °C (66.6 °F) in August 1996.
On the warmest days of the month, the temperature usually reaches around 35.5 °C (95.5 °F). However, it reached 39.4 °C (102.9 °F) in August 1999.
Precipitation amounts to 220 mm (8.7 in), distributed over 14 days.
The day lasts on average 12 hours and 10 minutes.
There are on average 5 sunshine hours per day. So, the sun shines 41% of the time.
The average humidity is 75%. Hence, the air is normally humid.
The average wind speed is 8 kph (5 mph).

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In September, the weather in Boa Vista is usually very hot. The average temperature is of 29.4 °C (85 °F), with a minimum of 24.6 °C (76.3 °F) and a maximum of 34.1 °C (93.4 °F).
On the coldest nights of the month, the temperature usually drops to around 22 °C (71.5 °F). However, it dropped to 20.9 °C (69.6 °F) in September 2000.
On the warmest days of the month, the temperature usually reaches around 36 °C (97 °F). However, it reached 39.5 °C (103.1 °F) in September 2012.
Precipitation amounts to 100 mm (3.9 in), distributed over 7 days.
The day lasts on average 12 hours and 5 minutes.
There are on average 6.5 sunshine hours per day. So, the sun shines 55% of the time.
The average humidity is 68%.
The average wind speed is 9 kph (6 mph).

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In October, the warmest month of the year, the weather in Boa Vista is usually very hot. The average temperature is of 29.7 °C (85 °F), with a minimum of 24.8 °C (76.6 °F) and a maximum of 34.6 °C (94.2 °F).
On the coldest nights of the month, the temperature usually drops to around 22 °C (72 °F). However, it dropped to 20.5 °C (68.9 °F) in October 2018.
On the warmest days of the month, the temperature usually reaches around 36 °C (97 °F). However, it reached 39 °C (102.2 °F) in October 2000.
Precipitation amounts to 60 mm (2.4 in), distributed over 5 days.
The day lasts on average 12 hours and 0 minutes.
There are on average 6.5 sunshine hours per day. So, the sun shines 55% of the time.
The average humidity is 65%.
The average wind speed is 10 kph (6 mph).

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In November, the weather in Boa Vista is usually very hot. The average temperature is of 29.5 °C (85 °F), with a minimum of 24.8 °C (76.6 °F) and a maximum of 34.3 °C (93.7 °F).
On the coldest nights of the month, the temperature usually drops to around 23 °C (73 °F). However, it dropped to 20 °C (68 °F) in November 2013.
On the warmest days of the month, the temperature usually reaches around 36 °C (97 °F). However, it reached 38 °C (100.4 °F) in November 2000.
Precipitation amounts to 60 mm (2.4 in), distributed over 5 days.
The day lasts on average 12 hours and 0 minutes.
There are on average 6.5 sunshine hours per day. So, the sun shines 54% of the time.
The average humidity is 66%.
The average wind speed is 11 kph (7 mph).

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In December, the weather in Boa Vista is usually very hot. The average temperature is of 29.0 °C (84 °F), with a minimum of 24.5 °C (76.1 °F) and a maximum of 33.5 °C (92.3 °F).
On the coldest nights of the month, the temperature usually drops to around 22 °C (72 °F). However, it dropped to 20.2 °C (68.4 °F) in December 1997.
On the warmest days of the month, the temperature usually reaches around 35.5 °C (95.5 °F). However, it reached 39 °C (102.2 °F) in December 1998.
Precipitation amounts to 30 mm (1.2 in), distributed over 5 days.
The day lasts on average 12 hours and 0 minutes.
There are on average 5.5 sunshine hours per day. So, the sun shines 47% of the time.
The average humidity is 65%.
The average wind speed is 14 kph (9 mph).