Açailândia climate — normals and trends
Açailândia (Brazil) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 25.9 °C and it receives 1,479 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 (27.8 °C on average) and the coldest is February (24.6 °C). Rainfall peaks in March.
Açailândia averages 0 frost days, 231 hot days (≥ 30 °C) and 178 rainy days per year.
Açailândia has warmed by +0.7 °C between 1940 and 2025, or +0.08 °C per decade. This trend is statistically significant.
The hottest day of the period reached 38.3 °C (on 26 October 1958) and the coldest 15.5 °C (on 28 July 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
AçailândiaMaranhão
- coords
- -4.95°, -47.50°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
25.9°C
Average daily high
30.9°C
Average daily low
22.0°C
Annual rainfall
1,479mm
Sunshine / day
10.4h
Mean relative humidity
75%
Average peak wind
11.9km/h
Seasonal range
3.2°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
231 d/yr
Rainy days (≥ 1 mm)
178 d/yr
Annual snowfall
0.0 cm
Average feels-like high
35.2 °C
Average feels-like low
24.9 °C
Average peak gust
31.3 km/h
Tropical nights (≥ 20 °C)
350 d/yr
Solar radiation
19.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.7 °C
since 1940
+0.1 °C per decade · r² = 0.12 · 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
38.3 °C
26 October 1958
Coldest day
15.5 °C
28 July 2020
Wettest day
175 mm
25 December 1945
Windiest day
26.6 km/h
4 August 1996
Strongest gust
58.7 km/h
7 September 1940
Hottest feels-like
43.5 °C
28 October 2018
Coldest feels-like
15.9 °C
28 July 2020
Sunniest day
12.1 h
4 February 2023
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 | 29.4 °C | +0.4 °C | 390 mm | +132 mm |
| Feb | 29.6 °C | +0.8 °C | 267 mm | +3 mm |
| Mar | 30.0 °C | +1.2 °C | 284 mm | -6 mm |
| Apr | 30.7 °C | +1.6 °C | 108 mm | -98 mm |
| May | 31.6 °C | +1.7 °C | 26 mm | -65 mm |
| Jun | 31.5 °C | +0.6 °C | 24 mm | +3 mm |
| Jul | 32.7 °C | +0.5 °C | 6 mm | -4 mm |
| Aug | 33.0 °C | -0.4 °C | 7 mm | -1 mm |
| Sep | 34.2 °C | +0.5 °C | 3 mm | -15 mm |
| Oct | 33.6 °C | +0.4 °C | 31 mm | -15 mm |
| Nov | 32.4 °C | +0.5 °C | 42 mm | -55 mm |
| Dec | 30.0 °C | -0.3 °C | 198 mm | +27 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 Açailândia?
Açailândia has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 25.9 °C and it receives 1,479 mm of precipitation per year.
What is the hottest day ever recorded in Açailândia?
The hottest day measured in Açailândia between 1940 and 2025 was 26 October 1958, reaching 38.3 °C.
What is the coldest day in Açailândia?
The coldest day measured in Açailândia between 1940 and 2025 was 28 July 2020, at 15.5 °C.
Does it snow in Açailândia?
Almost never: Açailândia sees virtually no snow, with about 0 frost days per year.
Has the climate of Açailândia warmed?
Yes: Açailândia warmed by +0.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Açailândia?
The wettest day measured in Açailândia between 1940 and 2025 was 25 December 1945, with 175 mm of rain in 24 hours.
What was the windiest day in Açailândia?
The windiest day measured in Açailândia between 1940 and 2025 was 4 August 1996, with winds reaching 26.6 km/h.
What is the warmest month in Açailândia?
The warmest month in Açailândia is September (27.8 °C on average); the coldest is February (24.6 °C).
How much does it rain in Açailândia?
Açailândia receives on average 1,479 mm of precipitation per year, spread over about 178 rainy days.
Is it sunny in Açailândia?
Açailândia gets on average 10.4 hours of sunshine per day, roughly 3,796 hours per year over 1940-2025.
Are there tropical nights in Açailândia?
Yes: Açailândia has on average 350 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Açailândia?
In Açailândia, between 1940 and 2025, the highest apparent temperature reached 43.5 °C on 28 October 2018, and the lowest was 15.9 °C on 28 July 2020.
Compare Açailândia with another city
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Nearby cities
The climate around Açailândia