Careiro climate — normals and trends
Careiro (Brazil) has a tropical rainforest climate (Af) under the Köppen-Geiger classification. Its mean annual temperature is 26.0 °C and it receives 3,197 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 (26.9 °C on average) and the coldest is January (25.5 °C). Rainfall peaks in March.
Careiro averages 0 frost days, 203 hot days (≥ 30 °C) and 307 rainy days per year.
Careiro has warmed by +1.5 °C between 1940 and 2025, or +0.18 °C per decade. This trend is statistically significant.
The hottest day of the period reached 38.8 °C (on 10 October 2023) and the coldest 17.4 °C (on 18 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
CareiroAmazonas
- coords
- -3.77°, -60.37°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
26.0°C
Average daily high
30.4°C
Average daily low
23.2°C
Annual rainfall
3,197mm
Sunshine / day
9.1h
Mean relative humidity
89%
Average peak wind
8.0km/h
Seasonal range
1.4°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
203 d/yr
Rainy days (≥ 1 mm)
307 d/yr
Annual snowfall
0.0 cm
Average feels-like high
37.0 °C
Average feels-like low
28.0 °C
Average peak gust
28.0 km/h
Tropical nights (≥ 20 °C)
364 d/yr
Solar radiation
16.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.5 °C
since 1940
+0.2 °C per decade · r² = 0.65 · 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
38.8 °C
10 October 2023
Coldest day
17.4 °C
18 July 1975
Wettest day
202 mm
10 May 2010
Windiest day
20.1 km/h
20 January 1965
Strongest gust
51.5 km/h
11 March 1983
Hottest feels-like
45.5 °C
14 October 1997
Coldest feels-like
16.8 °C
18 July 1975
Sunniest day
12.0 h
4 January 1940
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 | 30.4 °C | +0.9 °C | 208 mm | -139 mm |
| Feb | 29.6 °C | +0.1 °C | 503 mm | +159 mm |
| Mar | 30.2 °C | +0.5 °C | 427 mm | +29 mm |
| Apr | 30.8 °C | +1.2 °C | 367 mm | -31 mm |
| May | 30.9 °C | +1.3 °C | 225 mm | -108 mm |
| Jun | 30.9 °C | +1.0 °C | 178 mm | -22 mm |
| Jul | 32.0 °C | +1.6 °C | 37 mm | -109 mm |
| Aug | 32.4 °C | +1.0 °C | 131 mm | -13 mm |
| Sep | 31.8 °C | +0.1 °C | 125 mm | -45 mm |
| Oct | 31.6 °C | -0.2 °C | 277 mm | +93 mm |
| Nov | 31.5 °C | +0.4 °C | 310 mm | +88 mm |
| Dec | 31.1 °C | +1.1 °C | 306 mm | -5 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 Careiro?
Careiro has a tropical rainforest climate (Köppen Af). Over 1940-2025, the average annual temperature is 26.0 °C and it receives 3,197 mm of precipitation per year.
What is the hottest day ever recorded in Careiro?
The hottest day measured in Careiro between 1940 and 2025 was 10 October 2023, reaching 38.8 °C.
What is the coldest day in Careiro?
The coldest day measured in Careiro between 1940 and 2025 was 18 July 1975, at 17.4 °C.
Does it snow in Careiro?
Almost never: Careiro sees virtually no snow, with about 0 frost days per year.
Has the climate of Careiro warmed?
Yes: Careiro warmed by +1.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Careiro?
The wettest day measured in Careiro between 1940 and 2025 was 10 May 2010, with 202 mm of rain in 24 hours.
What was the windiest day in Careiro?
The windiest day measured in Careiro between 1940 and 2025 was 20 January 1965, with winds reaching 20.1 km/h.
What is the warmest month in Careiro?
The warmest month in Careiro is October (26.9 °C on average); the coldest is January (25.5 °C).
How much does it rain in Careiro?
Careiro receives on average 3,197 mm of precipitation per year, spread over about 307 rainy days.
Is it sunny in Careiro?
Careiro gets on average 9.1 hours of sunshine per day, roughly 3,322 hours per year over 1940-2025.
Are there tropical nights in Careiro?
Yes: Careiro has on average 364 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Careiro?
In Careiro, between 1940 and 2025, the highest apparent temperature reached 45.5 °C on 14 October 1997, and the lowest was 16.8 °C on 18 July 1975.
Compare Careiro with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Careiro