Ilha Solteira climate — normals and trends
Ilha Solteira (Brazil) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 24.6 °C and it receives 1,253 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 January (26.3 °C on average) and the coldest is June (21.2 °C). Rainfall peaks in January.
Ilha Solteira averages 0 frost days, 146 hot days (≥ 30 °C) and 143 rainy days per year.
Ilha Solteira has warmed by +1.8 °C between 1940 and 2025, or +0.21 °C per decade. This trend is statistically significant.
The hottest day of the period reached 40.9 °C (on 17 October 2014) and the coldest 3.9 °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
Ilha SolteiraSão Paulo
- coords
- -20.43°, -51.34°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
24.6°C
Average daily high
29.1°C
Average daily low
20.9°C
Annual rainfall
1,253mm
Sunshine / day
10.3h
Mean relative humidity
72%
Average peak wind
13.5km/h
Seasonal range
5.1°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
146 d/yr
Rainy days (≥ 1 mm)
143 d/yr
Annual snowfall
0.0 cm
Average feels-like high
32.1 °C
Average feels-like low
22.7 °C
Average peak gust
27.7 km/h
Tropical nights (≥ 20 °C)
240 d/yr
Solar radiation
18.9 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.8 °C
since 1940
+0.2 °C per decade · r² = 0.62 · 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
40.9 °C
17 October 2014
Coldest day
3.9 °C
18 July 1975
Wettest day
138 mm
3 December 1997
Windiest day
42.4 km/h
15 September 1956
Strongest gust
74.9 km/h
22 September 2025
Hottest feels-like
44.2 °C
29 October 2007
Coldest feels-like
-0.6 °C
18 July 1975
Sunniest day
13.0 h
18 December 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 | 32.2 °C | +2.3 °C | 93 mm | -123 mm |
| Feb | 31.5 °C | +1.5 °C | 134 mm | -62 mm |
| Mar | 33.1 °C | +3.3 °C | 37 mm | -115 mm |
| Apr | 29.6 °C | +0.7 °C | 80 mm | +14 mm |
| May | 28.6 °C | +1.7 °C | 21 mm | -23 mm |
| Jun | 27.0 °C | +0.8 °C | 20 mm | -4 mm |
| Jul | 27.3 °C | +0.6 °C | 0 mm | -18 mm |
| Aug | 29.3 °C | +0.2 °C | 2 mm | -17 mm |
| Sep | 33.3 °C | +2.6 °C | 10 mm | -36 mm |
| Oct | 30.9 °C | +0.2 °C | 57 mm | -54 mm |
| Nov | 31.5 °C | +1.3 °C | 69 mm | -83 mm |
| Dec | 31.7 °C | +1.9 °C | 115 mm | -96 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 Ilha Solteira?
Ilha Solteira has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 24.6 °C and it receives 1,253 mm of precipitation per year.
What is the hottest day ever recorded in Ilha Solteira?
The hottest day measured in Ilha Solteira between 1940 and 2025 was 17 October 2014, reaching 40.9 °C.
What is the coldest day in Ilha Solteira?
The coldest day measured in Ilha Solteira between 1940 and 2025 was 18 July 1975, at 3.9 °C.
Does it snow in Ilha Solteira?
Almost never: Ilha Solteira sees virtually no snow, with about 0 frost days per year.
Has the climate of Ilha Solteira warmed?
Yes: Ilha Solteira warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Ilha Solteira?
The wettest day measured in Ilha Solteira between 1940 and 2025 was 3 December 1997, with 138 mm of rain in 24 hours.
What was the windiest day in Ilha Solteira?
The windiest day measured in Ilha Solteira between 1940 and 2025 was 15 September 1956, with winds reaching 42.4 km/h.
What is the warmest month in Ilha Solteira?
The warmest month in Ilha Solteira is January (26.3 °C on average); the coldest is June (21.2 °C).
How much does it rain in Ilha Solteira?
Ilha Solteira receives on average 1,253 mm of precipitation per year, spread over about 143 rainy days.
Is it sunny in Ilha Solteira?
Ilha Solteira gets on average 10.3 hours of sunshine per day, roughly 3,760 hours per year over 1940-2025.
Are there tropical nights in Ilha Solteira?
Yes: Ilha Solteira has on average 240 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Ilha Solteira?
In Ilha Solteira, between 1940 and 2025, the highest apparent temperature reached 44.2 °C on 29 October 2007, and the lowest was -0.6 °C on 18 July 1975.
Compare Ilha Solteira with another city
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Nearby cities
The climate around Ilha Solteira