Vilhena climate — normals and trends
Vilhena (Brazil) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 23.8 °C and it receives 1,689 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 (25.3 °C on average) and the coldest is June (22.8 °C). Rainfall peaks in January.
Vilhena averages 0 frost days, 113 hot days (≥ 30 °C) and 221 rainy days per year.
Vilhena has warmed by +0.9 °C between 1940 and 2025, or +0.10 °C per decade. This trend is statistically significant.
The hottest day of the period reached 40.3 °C (on 16 September 1961) and the coldest 7.0 °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
VilhenaRondônia
- coords
- -12.74°, -60.15°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
23.8°C
Average daily high
28.9°C
Average daily low
20.2°C
Annual rainfall
1,689mm
Sunshine / day
9.8h
Mean relative humidity
79%
Average peak wind
10.5km/h
Seasonal range
2.5°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
113 d/yr
Rainy days (≥ 1 mm)
221 d/yr
Annual snowfall
0.0 cm
Average feels-like high
32.9 °C
Average feels-like low
22.5 °C
Average peak gust
27.9 km/h
Tropical nights (≥ 20 °C)
255 d/yr
Solar radiation
18.1 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+0.9 °C
since 1940
+0.1 °C per decade · r² = 0.27 · 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
40.3 °C
16 September 1961
Coldest day
7.0 °C
19 July 1975
Wettest day
131 mm
4 February 2018
Windiest day
29.7 km/h
21 January 1965
Strongest gust
76.0 km/h
21 January 1965
Hottest feels-like
42.1 °C
23 October 2015
Coldest feels-like
2.4 °C
18 July 1975
Sunniest day
12.5 h
21 January 2016
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 | 27.7 °C | 0.0 °C | 228 mm | -33 mm |
| Feb | 27.8 °C | +0.1 °C | 210 mm | -46 mm |
| Mar | 28.2 °C | +0.3 °C | 227 mm | -4 mm |
| Apr | 28.5 °C | +0.5 °C | 150 mm | +12 mm |
| May | 29.0 °C | +1.2 °C | 40 mm | -21 mm |
| Jun | 28.7 °C | +0.1 °C | 81 mm | +63 mm |
| Jul | 29.2 °C | -0.6 °C | 0 mm | -13 mm |
| Aug | 31.6 °C | +0.1 °C | 8 mm | -18 mm |
| Sep | 32.5 °C | +1.3 °C | 64 mm | -20 mm |
| Oct | 29.8 °C | -0.1 °C | 155 mm | -9 mm |
| Nov | 29.3 °C | +0.6 °C | 213 mm | +17 mm |
| Dec | 27.4 °C | -0.5 °C | 435 mm | +194 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 Vilhena?
Vilhena has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 23.8 °C and it receives 1,689 mm of precipitation per year.
What is the hottest day ever recorded in Vilhena?
The hottest day measured in Vilhena between 1940 and 2025 was 16 September 1961, reaching 40.3 °C.
What is the coldest day in Vilhena?
The coldest day measured in Vilhena between 1940 and 2025 was 19 July 1975, at 7.0 °C.
Does it snow in Vilhena?
Almost never: Vilhena sees virtually no snow, with about 0 frost days per year.
Has the climate of Vilhena warmed?
Yes: Vilhena warmed by +0.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Vilhena?
The wettest day measured in Vilhena between 1940 and 2025 was 4 February 2018, with 131 mm of rain in 24 hours.
What was the windiest day in Vilhena?
The windiest day measured in Vilhena between 1940 and 2025 was 21 January 1965, with winds reaching 29.7 km/h.
What is the warmest month in Vilhena?
The warmest month in Vilhena is September (25.3 °C on average); the coldest is June (22.8 °C).
How much does it rain in Vilhena?
Vilhena receives on average 1,689 mm of precipitation per year, spread over about 221 rainy days.
Is it sunny in Vilhena?
Vilhena gets on average 9.8 hours of sunshine per day, roughly 3,577 hours per year over 1940-2025.
Are there tropical nights in Vilhena?
Yes: Vilhena has on average 255 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Vilhena?
In Vilhena, between 1940 and 2025, the highest apparent temperature reached 42.1 °C on 23 October 2015, and the lowest was 2.4 °C on 18 July 1975.
Compare Vilhena with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Vilhena