Viseu climate — normals and trends
Viseu (Brazil) has a tropical monsoon climate (Am) under the Köppen-Geiger classification. Its mean annual temperature is 26.1 °C and it receives 2,567 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 November (27.3 °C on average) and the coldest is March (25.2 °C). Rainfall peaks in March.
Viseu averages 0 frost days, 166 hot days (≥ 30 °C) and 259 rainy days per year.
Viseu has warmed by +1.3 °C between 1940 and 2025, or +0.15 °C per decade. This trend is statistically significant.
The hottest day of the period reached 33.6 °C (on 27 October 1947) and the coldest 20.1 °C (on 24 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
ViseuPará
- coords
- -1.20°, -46.14°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
26.1°C
Average daily high
29.7°C
Average daily low
23.6°C
Annual rainfall
2,567mm
Sunshine / day
10.4h
Mean relative humidity
85%
Average peak wind
15.3km/h
Seasonal range
2.1°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
166 d/yr
Rainy days (≥ 1 mm)
259 d/yr
Annual snowfall
0.0 cm
Average feels-like high
34.7 °C
Average feels-like low
27.6 °C
Average peak gust
37.8 km/h
Tropical nights (≥ 20 °C)
364 d/yr
Solar radiation
18.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.3 °C
since 1940
+0.2 °C per decade · r² = 0.57 · 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
33.6 °C
27 October 1947
Coldest day
20.1 °C
24 July 1975
Wettest day
261 mm
8 February 2019
Windiest day
28.9 km/h
11 October 1960
Strongest gust
68.8 km/h
17 December 1992
Hottest feels-like
40.9 °C
7 May 1998
Coldest feels-like
21.2 °C
5 January 1960
Sunniest day
12.0 h
7 September 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 | 29.5 °C | +0.4 °C | 395 mm | +100 mm |
| Feb | 28.8 °C | +0.3 °C | 548 mm | +155 mm |
| Mar | 29.2 °C | +0.8 °C | 654 mm | +162 mm |
| Apr | 29.3 °C | +0.7 °C | 425 mm | -40 mm |
| May | 30.4 °C | +1.3 °C | 295 mm | -45 mm |
| Jun | 30.0 °C | +0.7 °C | 114 mm | -80 mm |
| Jul | 29.9 °C | +0.5 °C | 121 mm | -16 mm |
| Aug | 29.9 °C | 0.0 °C | 72 mm | +12 mm |
| Sep | 30.8 °C | +0.2 °C | 30 mm | +2 mm |
| Oct | 31.0 °C | -0.2 °C | 36 mm | +16 mm |
| Nov | 31.0 °C | -0.3 °C | 40 mm | +10 mm |
| Dec | 30.7 °C | +0.2 °C | 84 mm | -28 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 Viseu?
Viseu has a tropical monsoon climate (Köppen Am). Over 1940-2025, the average annual temperature is 26.1 °C and it receives 2,567 mm of precipitation per year.
What is the hottest day ever recorded in Viseu?
The hottest day measured in Viseu between 1940 and 2025 was 27 October 1947, reaching 33.6 °C.
What is the coldest day in Viseu?
The coldest day measured in Viseu between 1940 and 2025 was 24 July 1975, at 20.1 °C.
Does it snow in Viseu?
Almost never: Viseu sees virtually no snow, with about 0 frost days per year.
Has the climate of Viseu warmed?
Yes: Viseu warmed by +1.3 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Viseu?
The wettest day measured in Viseu between 1940 and 2025 was 8 February 2019, with 261 mm of rain in 24 hours.
What was the windiest day in Viseu?
The windiest day measured in Viseu between 1940 and 2025 was 11 October 1960, with winds reaching 28.9 km/h.
What is the warmest month in Viseu?
The warmest month in Viseu is November (27.3 °C on average); the coldest is March (25.2 °C).
How much does it rain in Viseu?
Viseu receives on average 2,567 mm of precipitation per year, spread over about 259 rainy days.
Is it sunny in Viseu?
Viseu gets on average 10.4 hours of sunshine per day, roughly 3,796 hours per year over 1940-2025.
Are there tropical nights in Viseu?
Yes: Viseu has on average 364 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Viseu?
In Viseu, between 1940 and 2025, the highest apparent temperature reached 40.9 °C on 7 May 1998, and the lowest was 21.2 °C on 5 January 1960.
Compare Viseu with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Viseu