Boca do Acre climate — normals and trends
Boca do Acre (Brazil) has a tropical monsoon climate (Am) under the Köppen-Geiger classification. Its mean annual temperature is 25.4 °C and it receives 1,974 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 (26.3 °C on average) and the coldest is June (24.5 °C). Rainfall peaks in March.
Boca do Acre averages 0 frost days, 186 hot days (≥ 30 °C) and 248 rainy days per year.
Boca do Acre 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 38.4 °C (on 16 September 1961) and the coldest 10.8 °C (on 19 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
Boca do AcreAmazonas
- coords
- -8.75°, -67.40°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
25.4°C
Average daily high
29.9°C
Average daily low
22.5°C
Annual rainfall
1,974mm
Sunshine / day
9.0h
Mean relative humidity
87%
Average peak wind
8.3km/h
Seasonal range
1.8°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
186 d/yr
Rainy days (≥ 1 mm)
248 d/yr
Annual snowfall
0.0 cm
Average feels-like high
35.7 °C
Average feels-like low
26.5 °C
Average peak gust
24.4 km/h
Tropical nights (≥ 20 °C)
344 d/yr
Solar radiation
17.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.2 °C
since 1940
+0.1 °C per decade · r² = 0.51 · 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
38.4 °C
16 September 1961
Coldest day
10.8 °C
19 July 1975
Wettest day
113 mm
3 January 2009
Windiest day
24.4 km/h
17 July 1975
Strongest gust
55.4 km/h
21 January 1965
Hottest feels-like
44.3 °C
20 October 2016
Coldest feels-like
8.0 °C
19 July 1975
Sunniest day
12.5 h
27 December 2022
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 | 29.8 °C | +0.2 °C | 261 mm | -5 mm |
| Feb | 29.4 °C | -0.1 °C | 323 mm | +57 mm |
| Mar | 30.0 °C | +0.3 °C | 330 mm | +58 mm |
| Apr | 30.1 °C | +0.8 °C | 311 mm | +106 mm |
| May | 30.1 °C | +1.2 °C | 125 mm | +10 mm |
| Jun | 28.9 °C | +0.1 °C | 34 mm | -19 mm |
| Jul | 30.6 °C | +1.1 °C | 8 mm | -25 mm |
| Aug | 31.8 °C | +0.8 °C | 37 mm | -14 mm |
| Sep | 31.3 °C | +0.1 °C | 168 mm | +72 mm |
| Oct | 31.0 °C | 0.0 °C | 181 mm | +24 mm |
| Nov | 30.2 °C | -0.1 °C | 258 mm | +48 mm |
| Dec | 29.4 °C | -0.3 °C | 282 mm | +31 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 Boca do Acre?
Boca do Acre has a tropical monsoon climate (Köppen Am). Over 1940-2025, the average annual temperature is 25.4 °C and it receives 1,974 mm of precipitation per year.
What is the hottest day ever recorded in Boca do Acre?
The hottest day measured in Boca do Acre between 1940 and 2025 was 16 September 1961, reaching 38.4 °C.
What is the coldest day in Boca do Acre?
The coldest day measured in Boca do Acre between 1940 and 2025 was 19 July 1975, at 10.8 °C.
Does it snow in Boca do Acre?
Almost never: Boca do Acre sees virtually no snow, with about 0 frost days per year.
Has the climate of Boca do Acre warmed?
Yes: Boca do Acre warmed by +1.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Boca do Acre?
The wettest day measured in Boca do Acre between 1940 and 2025 was 3 January 2009, with 113 mm of rain in 24 hours.
What was the windiest day in Boca do Acre?
The windiest day measured in Boca do Acre between 1940 and 2025 was 17 July 1975, with winds reaching 24.4 km/h.
What is the warmest month in Boca do Acre?
The warmest month in Boca do Acre is October (26.3 °C on average); the coldest is June (24.5 °C).
How much does it rain in Boca do Acre?
Boca do Acre receives on average 1,974 mm of precipitation per year, spread over about 248 rainy days.
Is it sunny in Boca do Acre?
Boca do Acre gets on average 9.0 hours of sunshine per day, roughly 3,285 hours per year over 1940-2025.
Are there tropical nights in Boca do Acre?
Yes: Boca do Acre has on average 344 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Boca do Acre?
In Boca do Acre, between 1940 and 2025, the highest apparent temperature reached 44.3 °C on 20 October 2016, and the lowest was 8.0 °C on 19 July 1975.
Compare Boca do Acre with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Boca do Acre