Boa Vista climate

Name: Boa Vista
Address: BR

Boa Vista is warmest in March, with average highs of 33 °C, and coldest in July, when nights average 22 °C. May is the wettest month (352 mm) and February the driest (31 mm). Figures are 1991–2020 climate normals.

Across a full year Boa Vista averages 1,782 mm of rain and 364 days above 25 °C.

Brazil · population 419,652 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month March 33 °C
Coldest month July 22 °C
Driest month February 31 mm
Wettest month May 352 mm
Least cloud September 59 % cloud
Hottest on record October 38 °C
Coldest on record May 20 °C

What to expectBoa Vista through the year

Boa Vista has a clear annual cycle: average daily highs run from 28 °C in July to 33 °C in March, a swing of 3.5 °C in mean temperature across the year.

Counted across a normal year, 364 days a year reach 25 °C, 218 of them reach 30 °C. The warmest reading in the 1991–2020 record is 38 °C, in October.

Rain is strongly seasonal. May averages 352 mm against 31 mm in February — 11 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	32.2 °C	34 mm	68 %
February	32.6 °C	31 mm	70 %
March	33.0 °C	63 mm	72 %
April	31.1 °C	202 mm	80 %
May	28.9 °C	352 mm	85 %
June	28.4 °C	317 mm	79 %
July	28.4 °C	263 mm	74 %
August	29.4 °C	174 mm	66 %
September	30.8 °C	104 mm	59 %
October	31.8 °C	81 mm	63 %
November	31.6 °C	97 mm	70 %
December	31.6 °C	63 mm	69 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	32.2 °C	24.2 °C	27.8 °C	36.6 °C	21.0 °C	31	27
February	32.6 °C	24.4 °C	28.1 °C	37.5 °C	20.8 °C	28	26
March	33.0 °C	24.6 °C	28.4 °C	37.5 °C	21.0 °C	31	28
April	31.1 °C	24.0 °C	27.1 °C	37.0 °C	21.1 °C	30	19
May	28.9 °C	23.3 °C	25.6 °C	34.8 °C	19.9 °C	31	7
June	28.4 °C	22.7 °C	25.0 °C	32.2 °C	20.5 °C	30	2
July	28.4 °C	22.4 °C	24.9 °C	31.5 °C	21.0 °C	31	2
August	29.4 °C	22.7 °C	25.6 °C	32.8 °C	20.6 °C	31	10
September	30.8 °C	23.2 °C	26.6 °C	36.0 °C	20.9 °C	30	21
October	31.8 °C	23.8 °C	27.5 °C	37.8 °C	21.2 °C	31	26
November	31.6 °C	24.0 °C	27.4 °C	37.3 °C	21.2 °C	30	24
December	31.6 °C	24.1 °C	27.5 °C	35.7 °C	21.7 °C	31	26

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	34 mm	6	12 h/day	68 %	64 %	17 km/h
February	31 mm	6	12 h/day	70 %	62 %	17 km/h
March	63 mm	8	12 h/day	72 %	63 %	16 km/h
April	202 mm	17	12 h/day	80 %	76 %	13 km/h
May	352 mm	26	12 h/day	85 %	87 %	10 km/h
June	317 mm	27	12 h/day	79 %	89 %	9.0 km/h
July	263 mm	27	12 h/day	74 %	89 %	8.4 km/h
August	174 mm	23	12 h/day	66 %	87 %	8.7 km/h
September	104 mm	15	12 h/day	59 %	82 %	9.5 km/h
October	81 mm	13	12 h/day	63 %	77 %	10 km/h
November	97 mm	13	12 h/day	70 %	77 %	11 km/h
December	63 mm	10	12 h/day	69 %	71 %	15 km/h

Where Boa Vista ranks

Ranking	Position	Value
The warmest places in South America in March	10th of 50	33 °C
The warmest places in South America in February	11th of 50	33 °C
The warmest places in South America in January	11th of 50	32 °C
The warmest places in South America in November	13th of 50	32 °C
The warmest places in South America in December	16th of 50	32 °C
The warmest places in South America in April	36th of 50	31 °C

Planning a trip? See the best time to visit Boa Vista.

QuestionsCommon questions about Boa Vista’s climate

When is the best time to visit Boa Vista?

That depends on what you want, so the honest answer is a comparison rather than a single month. May, June, July sit closest to 20 °C on average, March is the warmest month and February the driest. The month-by-month table above has the full picture.

How hot does Boa Vista get?

In March, the warmest month, daily highs average 33 °C. About 218 days a year pass 30 °C. The highest value in the 1991–2020 record is 38 °C.

How cold does it get in winter?

Nights average 22 °C in July, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Boa Vista?

May, averaging 352 mm over 26 days with rain. The driest month is February with 31 mm. The year as a whole averages 1,782 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Boa Vista rather than what any particular week will bring. Individual years can differ substantially from the normal.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Data point: 2.820°, -60.673° (the coordinates the reanalysis values are taken for)
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.