Itu climate — normals and trends
Itu (Brazil) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 20.5 °C and it receives 1,351 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 (23.2 °C on average) and the coldest is July (16.9 °C). Rainfall peaks in January.
Itu averages 0 frost days, 48 hot days (≥ 30 °C) and 147 rainy days per year.
Itu has warmed by +2.3 °C between 1940 and 2025, or +0.27 °C per decade. This trend is statistically significant.
The hottest day of the period reached 39.5 °C (on 20 January 2015) and the coldest 0.2 °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
ItuSão Paulo
- coords
- -23.26°, -47.30°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
20.5°C
Average daily high
25.8°C
Average daily low
16.2°C
Annual rainfall
1,351mm
Sunshine / day
9.7h
Mean relative humidity
76%
Average peak wind
15.8km/h
Seasonal range
6.3°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
48 d/yr
Rainy days (≥ 1 mm)
147 d/yr
Annual snowfall
0.0 cm
Average feels-like high
27.5 °C
Average feels-like low
16.3 °C
Average peak gust
34.3 km/h
Tropical nights (≥ 20 °C)
43 d/yr
Solar radiation
17.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.3 °C
since 1940
+0.3 °C per decade · r² = 0.67 · 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
39.5 °C
20 January 2015
Coldest day
0.2 °C
1 June 1979
Wettest day
182 mm
19 January 1977
Windiest day
37.4 km/h
10 December 2025
Strongest gust
87.5 km/h
22 September 2025
Hottest feels-like
42.3 °C
19 January 2015
Coldest feels-like
-3.2 °C
20 June 1981
Sunniest day
13.4 h
24 December 2025
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 | 29.1 °C | +1.3 °C | 159 mm | -59 mm |
| Feb | 30.6 °C | +2.6 °C | 110 mm | -64 mm |
| Mar | 31.0 °C | +3.5 °C | 62 mm | -73 mm |
| Apr | 26.9 °C | +0.9 °C | 90 mm | +22 mm |
| May | 26.0 °C | +2.3 °C | 15 mm | -54 mm |
| Jun | 23.5 °C | +0.8 °C | 42 mm | -8 mm |
| Jul | 23.3 °C | +0.5 °C | 7 mm | -38 mm |
| Aug | 25.9 °C | +1.2 °C | 9 mm | -30 mm |
| Sep | 28.3 °C | +2.1 °C | 19 mm | -60 mm |
| Oct | 27.0 °C | +0.5 °C | 96 mm | -36 mm |
| Nov | 27.6 °C | +0.7 °C | 83 mm | -58 mm |
| Dec | 30.5 °C | +3.2 °C | 180 mm | -22 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 Itu?
Itu has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 20.5 °C and it receives 1,351 mm of precipitation per year.
What is the hottest day ever recorded in Itu?
The hottest day measured in Itu between 1940 and 2025 was 20 January 2015, reaching 39.5 °C.
What is the coldest day in Itu?
The coldest day measured in Itu between 1940 and 2025 was 1 June 1979, at 0.2 °C.
Does it snow in Itu?
Almost never: Itu sees virtually no snow, with about 0 frost days per year.
Has the climate of Itu warmed?
Yes: Itu warmed by +2.3 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Itu?
The wettest day measured in Itu between 1940 and 2025 was 19 January 1977, with 182 mm of rain in 24 hours.
What was the windiest day in Itu?
The windiest day measured in Itu between 1940 and 2025 was 10 December 2025, with winds reaching 37.4 km/h.
What is the warmest month in Itu?
The warmest month in Itu is February (23.2 °C on average); the coldest is July (16.9 °C).
How much does it rain in Itu?
Itu receives on average 1,351 mm of precipitation per year, spread over about 147 rainy days.
Is it sunny in Itu?
Itu gets on average 9.7 hours of sunshine per day, roughly 3,540 hours per year over 1940-2025.
Are there tropical nights in Itu?
Yes: Itu has on average 43 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Itu?
In Itu, between 1940 and 2025, the highest apparent temperature reached 42.3 °C on 19 January 2015, and the lowest was -3.2 °C on 20 June 1981.
Compare Itu with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Itu