Benjamin Constant climate — normals and trends
Benjamin Constant (Brazil) has a tropical rainforest climate (Af) under the Köppen-Geiger classification. Its mean annual temperature is 25.5 °C and it receives 2,740 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 (26.0 °C on average) and the coldest is June (24.8 °C). Rainfall peaks in March.
Benjamin Constant averages 0 frost days, 152 hot days (≥ 30 °C) and 318 rainy days per year.
Benjamin Constant 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 36.9 °C (on 26 September 2005) and the coldest 14.8 °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
Benjamin ConstantAmazonas
- coords
- -4.38°, -70.03°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
25.5°C
Average daily high
29.6°C
Average daily low
22.8°C
Annual rainfall
2,740mm
Sunshine / day
8.9h
Mean relative humidity
89%
Average peak wind
7.1km/h
Seasonal range
1.2°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
152 d/yr
Rainy days (≥ 1 mm)
318 d/yr
Annual snowfall
0.0 cm
Average feels-like high
36.2 °C
Average feels-like low
27.3 °C
Average peak gust
23.7 km/h
Tropical nights (≥ 20 °C)
361 d/yr
Solar radiation
16.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.2 °C
since 1940
+0.1 °C per decade · r² = 0.64 · 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
36.9 °C
26 September 2005
Coldest day
14.8 °C
19 July 1975
Wettest day
155 mm
23 November 2025
Windiest day
20.0 km/h
29 June 1996
Strongest gust
48.6 km/h
9 July 1994
Hottest feels-like
45.9 °C
26 September 2005
Coldest feels-like
13.2 °C
20 July 1981
Sunniest day
12.3 h
9 December 1957
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 | 30.3 °C | +0.6 °C | 306 mm | +11 mm |
| Feb | 28.6 °C | -1.1 °C | 480 mm | +196 mm |
| Mar | 29.7 °C | +0.1 °C | 479 mm | +161 mm |
| Apr | 30.1 °C | +0.8 °C | 290 mm | -11 mm |
| May | 29.5 °C | +0.6 °C | 255 mm | +8 mm |
| Jun | 29.4 °C | +0.7 °C | 166 mm | +2 mm |
| Jul | 29.8 °C | +0.9 °C | 80 mm | -44 mm |
| Aug | 30.3 °C | +0.5 °C | 94 mm | -33 mm |
| Sep | 30.4 °C | +0.2 °C | 216 mm | +50 mm |
| Oct | 29.4 °C | -1.0 °C | 247 mm | +41 mm |
| Nov | 29.4 °C | -0.7 °C | 400 mm | +163 mm |
| Dec | 29.2 °C | -0.4 °C | 345 mm | +74 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 Benjamin Constant?
Benjamin Constant has a tropical rainforest climate (Köppen Af). Over 1940-2025, the average annual temperature is 25.5 °C and it receives 2,740 mm of precipitation per year.
What is the hottest day ever recorded in Benjamin Constant?
The hottest day measured in Benjamin Constant between 1940 and 2025 was 26 September 2005, reaching 36.9 °C.
What is the coldest day in Benjamin Constant?
The coldest day measured in Benjamin Constant between 1940 and 2025 was 19 July 1975, at 14.8 °C.
Does it snow in Benjamin Constant?
Almost never: Benjamin Constant sees virtually no snow, with about 0 frost days per year.
Has the climate of Benjamin Constant warmed?
Yes: Benjamin Constant warmed by +1.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Benjamin Constant?
The wettest day measured in Benjamin Constant between 1940 and 2025 was 23 November 2025, with 155 mm of rain in 24 hours.
What was the windiest day in Benjamin Constant?
The windiest day measured in Benjamin Constant between 1940 and 2025 was 29 June 1996, with winds reaching 20.0 km/h.
What is the warmest month in Benjamin Constant?
The warmest month in Benjamin Constant is October (26.0 °C on average); the coldest is June (24.8 °C).
How much does it rain in Benjamin Constant?
Benjamin Constant receives on average 2,740 mm of precipitation per year, spread over about 318 rainy days.
Is it sunny in Benjamin Constant?
Benjamin Constant gets on average 8.9 hours of sunshine per day, roughly 3,249 hours per year over 1940-2025.
Are there tropical nights in Benjamin Constant?
Yes: Benjamin Constant has on average 361 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Benjamin Constant?
In Benjamin Constant, between 1940 and 2025, the highest apparent temperature reached 45.9 °C on 26 September 2005, and the lowest was 13.2 °C on 20 July 1981.
Compare Benjamin Constant with another city
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Nearby cities
The climate around Benjamin Constant