Iúna climate — normals and trends
Iúna (Brazil) has a humid subtropical, dry winter climate (Cwa) under the Köppen-Geiger classification. Its mean annual temperature is 20.4 °C and it receives 1,154 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 February (22.9 °C on average) and the coldest is July (17.4 °C). Rainfall peaks in December.
Iúna averages 0 frost days, 20 hot days (≥ 30 °C) and 133 rainy days per year.
Iúna has warmed by +2.0 °C between 1940 and 2025, or +0.24 °C per decade. This trend is statistically significant.
The hottest day of the period reached 36.4 °C (on 15 October 1963) and the coldest 6.5 °C (on 1 June 1979).
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
IúnaEspírito Santo
- coords
- -20.35°, -41.54°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
20.4°C
Average daily high
25.1°C
Average daily low
16.5°C
Annual rainfall
1,154mm
Sunshine / day
9.6h
Mean relative humidity
79%
Average peak wind
10.1km/h
Seasonal range
5.5°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
20 d/yr
Rainy days (≥ 1 mm)
133 d/yr
Annual snowfall
0.0 cm
Average feels-like high
27.0 °C
Average feels-like low
17.6 °C
Average peak gust
29.5 km/h
Tropical nights (≥ 20 °C)
22 d/yr
Solar radiation
16.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.0 °C
since 1940
+0.2 °C per decade · r² = 0.66 · 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
36.4 °C
15 October 1963
Coldest day
6.5 °C
1 June 1979
Wettest day
145 mm
26 November 1981
Windiest day
25.9 km/h
28 August 1954
Strongest gust
76.0 km/h
21 November 1984
Hottest feels-like
40.8 °C
26 January 2006
Coldest feels-like
3.7 °C
1 June 1979
Sunniest day
13.1 h
3 January 1947
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 | 28.0 °C | +0.8 °C | 293 mm | +119 mm |
| Feb | 31.0 °C | +3.3 °C | 11 mm | -99 mm |
| Mar | 28.8 °C | +1.8 °C | 101 mm | -31 mm |
| Apr | 26.0 °C | +0.6 °C | 75 mm | +5 mm |
| May | 24.4 °C | +0.7 °C | 21 mm | -12 mm |
| Jun | 24.2 °C | +1.4 °C | 11 mm | -7 mm |
| Jul | 23.7 °C | +1.2 °C | 4 mm | -12 mm |
| Aug | 24.9 °C | +1.4 °C | 26 mm | +7 mm |
| Sep | 25.1 °C | +0.5 °C | 31 mm | -15 mm |
| Oct | 25.7 °C | +0.5 °C | 80 mm | -44 mm |
| Nov | 26.8 °C | +1.6 °C | 64 mm | -129 mm |
| Dec | 28.7 °C | +2.6 °C | 119 mm | -102 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 Iúna?
Iúna has a humid subtropical, dry winter climate (Köppen Cwa). Over 1940-2025, the average annual temperature is 20.4 °C and it receives 1,154 mm of precipitation per year.
What is the hottest day ever recorded in Iúna?
The hottest day measured in Iúna between 1940 and 2025 was 15 October 1963, reaching 36.4 °C.
What is the coldest day in Iúna?
The coldest day measured in Iúna between 1940 and 2025 was 1 June 1979, at 6.5 °C.
Does it snow in Iúna?
Almost never: Iúna sees virtually no snow, with about 0 frost days per year.
Has the climate of Iúna warmed?
Yes: Iúna warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Iúna?
The wettest day measured in Iúna between 1940 and 2025 was 26 November 1981, with 145 mm of rain in 24 hours.
What was the windiest day in Iúna?
The windiest day measured in Iúna between 1940 and 2025 was 28 August 1954, with winds reaching 25.9 km/h.
What is the warmest month in Iúna?
The warmest month in Iúna is February (22.9 °C on average); the coldest is July (17.4 °C).
How much does it rain in Iúna?
Iúna receives on average 1,154 mm of precipitation per year, spread over about 133 rainy days.
Is it sunny in Iúna?
Iúna gets on average 9.6 hours of sunshine per day, roughly 3,504 hours per year over 1940-2025.
Are there tropical nights in Iúna?
Yes: Iúna has on average 22 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Iúna?
In Iúna, between 1940 and 2025, the highest apparent temperature reached 40.8 °C on 26 January 2006, and the lowest was 3.7 °C on 1 June 1979.
Compare Iúna with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Iúna