São Bento climate — normals and trends
São Bento (Brazil) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 27.0 °C and it receives 1,719 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 November (28.1 °C on average) and the coldest is March (26.1 °C). Rainfall peaks in March.
São Bento averages 0 frost days, 233 hot days (≥ 30 °C) and 199 rainy days per year.
São Bento has warmed by +1.2 °C between 1940 and 2025, or +0.14 °C per decade. This trend is statistically significant.
The hottest day of the period reached 37.1 °C (on 9 September 2012) and the coldest 20.6 °C (on 27 July 1975).
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 BentoMaranhão
- coords
- -2.70°, -44.82°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
27.0°C
Average daily high
30.7°C
Average daily low
24.4°C
Annual rainfall
1,719mm
Sunshine / day
10.7h
Mean relative humidity
80%
Average peak wind
16.6km/h
Seasonal range
2.0°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
233 d/yr
Rainy days (≥ 1 mm)
199 d/yr
Annual snowfall
0.0 cm
Average feels-like high
35.3 °C
Average feels-like low
28.5 °C
Average peak gust
35.6 km/h
Tropical nights (≥ 20 °C)
364 d/yr
Solar radiation
18.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.2 °C
since 1940
+0.1 °C per decade · r² = 0.47 · 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
37.1 °C
9 September 2012
Coldest day
20.6 °C
27 July 1975
Wettest day
253 mm
15 February 1980
Windiest day
32.6 km/h
9 November 1965
Strongest gust
60.1 km/h
29 September 1989
Hottest feels-like
41.6 °C
25 October 2017
Coldest feels-like
21.6 °C
4 July 1974
Sunniest day
12.0 h
2 January 1940
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 | 30.7 °C | +0.5 °C | 370 mm | +172 mm |
| Feb | 29.9 °C | +0.3 °C | 282 mm | +22 mm |
| Mar | 30.3 °C | +1.0 °C | 349 mm | -2 mm |
| Apr | 30.4 °C | +0.9 °C | 279 mm | -59 mm |
| May | 30.8 °C | +1.0 °C | 115 mm | -126 mm |
| Jun | 30.3 °C | +0.4 °C | 72 mm | -46 mm |
| Jul | 30.7 °C | +0.6 °C | 58 mm | -9 mm |
| Aug | 32.0 °C | +0.6 °C | 17 mm | -5 mm |
| Sep | 33.4 °C | +1.3 °C | 5 mm | -8 mm |
| Oct | 33.3 °C | +0.9 °C | 10 mm | -3 mm |
| Nov | 32.4 °C | -0.1 °C | 10 mm | -12 mm |
| Dec | 31.8 °C | 0.0 °C | 55 mm | -20 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 Bento?
São Bento has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 27.0 °C and it receives 1,719 mm of precipitation per year.
What is the hottest day ever recorded in São Bento?
The hottest day measured in São Bento between 1940 and 2025 was 9 September 2012, reaching 37.1 °C.
What is the coldest day in São Bento?
The coldest day measured in São Bento between 1940 and 2025 was 27 July 1975, at 20.6 °C.
Does it snow in São Bento?
Almost never: São Bento sees virtually no snow, with about 0 frost days per year.
Has the climate of São Bento warmed?
Yes: São Bento warmed by +1.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in São Bento?
The wettest day measured in São Bento between 1940 and 2025 was 15 February 1980, with 253 mm of rain in 24 hours.
What was the windiest day in São Bento?
The windiest day measured in São Bento between 1940 and 2025 was 9 November 1965, with winds reaching 32.6 km/h.
What is the warmest month in São Bento?
The warmest month in São Bento is November (28.1 °C on average); the coldest is March (26.1 °C).
How much does it rain in São Bento?
São Bento receives on average 1,719 mm of precipitation per year, spread over about 199 rainy days.
Is it sunny in São Bento?
São Bento gets on average 10.7 hours of sunshine per day, roughly 3,905 hours per year over 1940-2025.
Are there tropical nights in São Bento?
Yes: São Bento 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 Bento?
In São Bento, between 1940 and 2025, the highest apparent temperature reached 41.6 °C on 25 October 2017, and the lowest was 21.6 °C on 4 July 1974.
Compare São Bento with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around São Bento