São Sebastião da Boa Vista climate — normals and trends
São Sebastião da Boa Vista (Brazil) has a tropical monsoon climate (Am) under the Köppen-Geiger classification. Its mean annual temperature is 26.9 °C and it receives 2,218 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is October (28.2 °C on average) and the coldest is February (25.8 °C). Rainfall peaks in March.
São Sebastião da Boa Vista averages 0 frost days, 222 hot days (≥ 30 °C) and 223 rainy days per year.
São Sebastião da Boa Vista has warmed by +1.6 °C between 1940 and 2025, or +0.18 °C per decade. This trend is statistically significant.
The hottest day of the period reached 35.1 °C (on 9 October 2009) and the coldest 21.3 °C (on 23 January 1964).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
São Sebastião da Boa VistaPará
- coords
- -1.71°, -49.53°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
26.9°C
Average daily high
30.4°C
Average daily low
24.3°C
Annual rainfall
2,218mm
Sunshine / day
10.4h
Mean relative humidity
83%
Average peak wind
11.8km/h
Seasonal range
2.4°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
222 d/yr
Rainy days (≥ 1 mm)
223 d/yr
Annual snowfall
0.0 cm
Average feels-like high
36.3 °C
Average feels-like low
28.7 °C
Average peak gust
30.8 km/h
Tropical nights (≥ 20 °C)
364 d/yr
Solar radiation
19.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.6 °C
since 1940
+0.2 °C per decade · r² = 0.64 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
35.1 °C
9 October 2009
Coldest day
21.3 °C
23 January 1964
Wettest day
316 mm
20 February 1959
Windiest day
22.7 km/h
4 November 1944
Strongest gust
62.3 km/h
6 December 1981
Hottest feels-like
42.6 °C
7 March 2005
Coldest feels-like
23.9 °C
23 January 1964
Sunniest day
12.1 h
23 January 1941
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 30.1 °C | +0.6 °C | 326 mm | +35 mm |
| Feb | 29.7 °C | +0.7 °C | 596 mm | +243 mm |
| Mar | 29.6 °C | +0.6 °C | 598 mm | +170 mm |
| Apr | 30.2 °C | +1.0 °C | 295 mm | -95 mm |
| May | 31.4 °C | +1.7 °C | 253 mm | -33 mm |
| Jun | 31.0 °C | +1.0 °C | 183 mm | +52 mm |
| Jul | 31.1 °C | +0.8 °C | 111 mm | +33 mm |
| Aug | 31.2 °C | 0.0 °C | 83 mm | +44 mm |
| Sep | 31.7 °C | -0.1 °C | 14 mm | -8 mm |
| Oct | 32.0 °C | -0.3 °C | 21 mm | +4 mm |
| Nov | 32.0 °C | 0.0 °C | 37 mm | -5 mm |
| Dec | 30.9 °C | 0.0 °C | 133 mm | -7 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of São Sebastião da Boa Vista?
São Sebastião da Boa Vista has a tropical monsoon climate (Köppen Am). Over 1940-2025, the average annual temperature is 26.9 °C and it receives 2,218 mm of precipitation per year.
What is the hottest day ever recorded in São Sebastião da Boa Vista?
The hottest day measured in São Sebastião da Boa Vista between 1940 and 2025 was 9 October 2009, reaching 35.1 °C.
What is the coldest day in São Sebastião da Boa Vista?
The coldest day measured in São Sebastião da Boa Vista between 1940 and 2025 was 23 January 1964, at 21.3 °C.
Does it snow in São Sebastião da Boa Vista?
Almost never: São Sebastião da Boa Vista sees virtually no snow, with about 0 frost days per year.
Has the climate of São Sebastião da Boa Vista warmed?
Yes: São Sebastião da Boa Vista warmed by +1.6 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in São Sebastião da Boa Vista?
The wettest day measured in São Sebastião da Boa Vista between 1940 and 2025 was 20 February 1959, with 316 mm of rain in 24 hours.
What was the windiest day in São Sebastião da Boa Vista?
The windiest day measured in São Sebastião da Boa Vista between 1940 and 2025 was 4 November 1944, with winds reaching 22.7 km/h.
What is the warmest month in São Sebastião da Boa Vista?
The warmest month in São Sebastião da Boa Vista is October (28.2 °C on average); the coldest is February (25.8 °C).
How much does it rain in São Sebastião da Boa Vista?
São Sebastião da Boa Vista receives on average 2,218 mm of precipitation per year, spread over about 223 rainy days.
Is it sunny in São Sebastião da Boa Vista?
São Sebastião da Boa Vista gets on average 10.4 hours of sunshine per day, roughly 3,796 hours per year over 1940-2025.
Are there tropical nights in São Sebastião da Boa Vista?
Yes: São Sebastião da Boa Vista has on average 364 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in São Sebastião da Boa Vista?
In São Sebastião da Boa Vista, between 1940 and 2025, the highest apparent temperature reached 42.6 °C on 7 March 2005, and the lowest was 23.9 °C on 23 January 1964.
Compare São Sebastião da Boa Vista with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around São Sebastião da Boa Vista