Balsas climate — normals and trends
Balsas (Brazil) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 26.9 °C and it receives 1,076 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 (29.4 °C on average) and the coldest is February (25.5 °C). Rainfall peaks in January.
Balsas averages 0 frost days, 284 hot days (≥ 30 °C) and 141 rainy days per year.
Balsas has warmed by +0.5 °C between 1940 and 2025, or +0.06 °C per decade. This trend is statistically significant.
The hottest day of the period reached 40.2 °C (on 10 October 1980) and the coldest 16.7 °C (on 23 June 2020).
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
BalsasMaranhão
- coords
- -7.53°, -46.04°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
26.9°C
Average daily high
32.1°C
Average daily low
22.5°C
Annual rainfall
1,076mm
Sunshine / day
10.7h
Mean relative humidity
66%
Average peak wind
12.5km/h
Seasonal range
3.9°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
284 d/yr
Rainy days (≥ 1 mm)
141 d/yr
Annual snowfall
0.0 cm
Average feels-like high
35.5 °C
Average feels-like low
24.8 °C
Average peak gust
31.5 km/h
Tropical nights (≥ 20 °C)
355 d/yr
Solar radiation
20.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.5 °C
since 1940
+0.1 °C per decade · r² = 0.05 · p = 0.037
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
40.2 °C
10 October 1980
Coldest day
16.7 °C
23 June 2020
Wettest day
232 mm
19 February 2007
Windiest day
27.3 km/h
26 June 2010
Strongest gust
56.5 km/h
11 October 1960
Hottest feels-like
43.8 °C
4 October 2015
Coldest feels-like
14.8 °C
28 July 2025
Sunniest day
12.2 h
28 January 1956
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 30.1 °C | 0.0 °C | 305 mm | +109 mm |
| Feb | 31.0 °C | +1.0 °C | 95 mm | -89 mm |
| Mar | 31.1 °C | +1.1 °C | 122 mm | -66 mm |
| Apr | 32.1 °C | +1.7 °C | 32 mm | -88 mm |
| May | 33.9 °C | +2.3 °C | 4 mm | -31 mm |
| Jun | 33.7 °C | +1.2 °C | 1 mm | -4 mm |
| Jul | 34.3 °C | +1.2 °C | 1 mm | -1 mm |
| Aug | 35.4 °C | +0.9 °C | 1 mm | -1 mm |
| Sep | 36.9 °C | +1.5 °C | 1 mm | -9 mm |
| Oct | 35.7 °C | +1.6 °C | 26 mm | -29 mm |
| Nov | 33.0 °C | +0.9 °C | 84 mm | -36 mm |
| Dec | 30.5 °C | -0.4 °C | 125 mm | -34 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 Balsas?
Balsas has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 26.9 °C and it receives 1,076 mm of precipitation per year.
What is the hottest day ever recorded in Balsas?
The hottest day measured in Balsas between 1940 and 2025 was 10 October 1980, reaching 40.2 °C.
What is the coldest day in Balsas?
The coldest day measured in Balsas between 1940 and 2025 was 23 June 2020, at 16.7 °C.
Does it snow in Balsas?
Almost never: Balsas sees virtually no snow, with about 0 frost days per year.
Has the climate of Balsas warmed?
Yes: Balsas warmed by +0.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Balsas?
The wettest day measured in Balsas between 1940 and 2025 was 19 February 2007, with 232 mm of rain in 24 hours.
What was the windiest day in Balsas?
The windiest day measured in Balsas between 1940 and 2025 was 26 June 2010, with winds reaching 27.3 km/h.
What is the warmest month in Balsas?
The warmest month in Balsas is September (29.4 °C on average); the coldest is February (25.5 °C).
How much does it rain in Balsas?
Balsas receives on average 1,076 mm of precipitation per year, spread over about 141 rainy days.
Is it sunny in Balsas?
Balsas gets on average 10.7 hours of sunshine per day, roughly 3,905 hours per year over 1940-2025.
Are there tropical nights in Balsas?
Yes: Balsas has on average 355 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Balsas?
In Balsas, between 1940 and 2025, the highest apparent temperature reached 43.8 °C on 4 October 2015, and the lowest was 14.8 °C on 28 July 2025.
Compare Balsas with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Balsas