Pastos Bons climate — normals and trends
Pastos Bons (Brazil) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 26.4 °C and it receives 1,162 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 September (28.7 °C on average) and the coldest is March (24.8 °C). Rainfall peaks in March.
Pastos Bons averages 0 frost days, 249 hot days (≥ 30 °C) and 145 rainy days per year.
Pastos Bons has warmed by +1.0 °C between 1940 and 2025, or +0.11 °C per decade. This trend is statistically significant.
The hottest day of the period reached 39.0 °C (on 25 September 2023) and the coldest 18.1 °C (on 28 July 1986).
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
Pastos BonsMaranhão
- coords
- -6.60°, -44.08°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
26.4°C
Average daily high
31.4°C
Average daily low
22.6°C
Annual rainfall
1,162mm
Sunshine / day
10.6h
Mean relative humidity
69%
Average peak wind
12.7km/h
Seasonal range
3.9°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
249 d/yr
Rainy days (≥ 1 mm)
145 d/yr
Annual snowfall
0.0 cm
Average feels-like high
34.8 °C
Average feels-like low
24.8 °C
Average peak gust
33.2 km/h
Tropical nights (≥ 20 °C)
361 d/yr
Solar radiation
19.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.0 °C
since 1940
+0.1 °C per decade · r² = 0.18 · 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
39.0 °C
25 September 2023
Coldest day
18.1 °C
28 July 1986
Wettest day
121 mm
18 January 1955
Windiest day
28.2 km/h
15 August 1991
Strongest gust
63.0 km/h
15 August 1991
Hottest feels-like
44.0 °C
31 October 2012
Coldest feels-like
16.5 °C
31 July 1974
Sunniest day
12.1 h
22 November 2009
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 | 29.7 °C | +0.3 °C | 342 mm | +126 mm |
| Feb | 30.8 °C | +1.6 °C | 93 mm | -121 mm |
| Mar | 30.2 °C | +1.2 °C | 121 mm | -117 mm |
| Apr | 31.7 °C | +2.3 °C | 53 mm | -95 mm |
| May | 33.1 °C | +2.6 °C | 3 mm | -42 mm |
| Jun | 33.1 °C | +1.8 °C | 2 mm | -5 mm |
| Jul | 33.7 °C | +1.7 °C | 2 mm | -1 mm |
| Aug | 34.2 °C | +0.8 °C | 2 mm | +1 mm |
| Sep | 35.7 °C | +1.0 °C | 1 mm | -9 mm |
| Oct | 35.5 °C | +1.3 °C | 24 mm | -16 mm |
| Nov | 33.9 °C | +1.6 °C | 19 mm | -76 mm |
| Dec | 30.6 °C | -0.2 °C | 99 mm | -48 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 Pastos Bons?
Pastos Bons has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 26.4 °C and it receives 1,162 mm of precipitation per year.
What is the hottest day ever recorded in Pastos Bons?
The hottest day measured in Pastos Bons between 1940 and 2025 was 25 September 2023, reaching 39.0 °C.
What is the coldest day in Pastos Bons?
The coldest day measured in Pastos Bons between 1940 and 2025 was 28 July 1986, at 18.1 °C.
Does it snow in Pastos Bons?
Almost never: Pastos Bons sees virtually no snow, with about 0 frost days per year.
Has the climate of Pastos Bons warmed?
Yes: Pastos Bons warmed by +1.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Pastos Bons?
The wettest day measured in Pastos Bons between 1940 and 2025 was 18 January 1955, with 121 mm of rain in 24 hours.
What was the windiest day in Pastos Bons?
The windiest day measured in Pastos Bons between 1940 and 2025 was 15 August 1991, with winds reaching 28.2 km/h.
What is the warmest month in Pastos Bons?
The warmest month in Pastos Bons is September (28.7 °C on average); the coldest is March (24.8 °C).
How much does it rain in Pastos Bons?
Pastos Bons receives on average 1,162 mm of precipitation per year, spread over about 145 rainy days.
Is it sunny in Pastos Bons?
Pastos Bons gets on average 10.6 hours of sunshine per day, roughly 3,869 hours per year over 1940-2025.
Are there tropical nights in Pastos Bons?
Yes: Pastos Bons has on average 361 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Pastos Bons?
In Pastos Bons, between 1940 and 2025, the highest apparent temperature reached 44.0 °C on 31 October 2012, and the lowest was 16.5 °C on 31 July 1974.
Compare Pastos Bons with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Pastos Bons