São Mateus do Sul climate — normals and trends
São Mateus do Sul (Brazil) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 17.8 °C and it receives 1,436 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 (21.5 °C on average) and the coldest is July (13.4 °C). Rainfall peaks in January.
São Mateus do Sul averages 1 frost days, 11 hot days (≥ 30 °C) and 158 rainy days per year.
São Mateus do Sul has warmed by +1.2 °C between 1940 and 2025, or +0.14 °C per decade. This trend is statistically significant.
The number of frost days there went from about 0 to 2 per year over the period.
The hottest day of the period reached 35.3 °C (on 13 December 2018) and the coldest -6.2 °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
São Mateus do SulParaná
- coords
- -25.87°, -50.38°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
17.8°C
Average daily high
23.0°C
Average daily low
13.7°C
Annual rainfall
1,436mm
Sunshine / day
8.3h
Mean relative humidity
81%
Average peak wind
14.2km/h
Seasonal range
8.1°C
Frost days (< 0 °C)
1 d/yr
Hot days (≥ 30 °C)
11 d/yr
Rainy days (≥ 1 mm)
158 d/yr
Annual snowfall
0.0 cm
Average feels-like high
24.2 °C
Average feels-like low
13.4 °C
Average peak gust
30.7 km/h
Tropical nights (≥ 20 °C)
6 d/yr
Solar radiation
15.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.2 °C
since 1940
+0.1 °C per decade · r² = 0.38 · 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
35.3 °C
13 December 2018
Coldest day
-6.2 °C
18 July 1975
Wettest day
123 mm
18 January 1977
Windiest day
51.2 km/h
15 September 1956
Strongest gust
95.8 km/h
19 September 2012
Hottest feels-like
39.3 °C
19 January 1988
Coldest feels-like
-10.3 °C
18 July 1975
Snowiest day
1.5 cm
20 July 1981
Sunniest day
13.6 h
6 December 1945
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 | 26.9 °C | +0.5 °C | 139 mm | -37 mm |
| Feb | 28.3 °C | +2.0 °C | 141 mm | -9 mm |
| Mar | 27.9 °C | +2.4 °C | 61 mm | -56 mm |
| Apr | 23.5 °C | +0.3 °C | 52 mm | -29 mm |
| May | 22.1 °C | +1.7 °C | 59 mm | -36 mm |
| Jun | 18.3 °C | -0.7 °C | 164 mm | +70 mm |
| Jul | 18.3 °C | -0.7 °C | 36 mm | -44 mm |
| Aug | 20.1 °C | -0.8 °C | 88 mm | +0 mm |
| Sep | 22.6 °C | +0.6 °C | 83 mm | -47 mm |
| Oct | 21.8 °C | -1.4 °C | 197 mm | +40 mm |
| Nov | 24.9 °C | +0.2 °C | 170 mm | +42 mm |
| Dec | 27.5 °C | +1.6 °C | 159 mm | +18 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 São Mateus do Sul?
São Mateus do Sul has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 17.8 °C and it receives 1,436 mm of precipitation per year.
What is the hottest day ever recorded in São Mateus do Sul?
The hottest day measured in São Mateus do Sul between 1940 and 2025 was 13 December 2018, reaching 35.3 °C.
What is the coldest day in São Mateus do Sul?
The coldest day measured in São Mateus do Sul between 1940 and 2025 was 18 July 1975, at -6.2 °C.
Does it snow in São Mateus do Sul?
Almost never: São Mateus do Sul sees virtually no snow, with about 1 frost days per year.
Has the climate of São Mateus do Sul warmed?
Yes: São Mateus do Sul warmed by +1.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in São Mateus do Sul?
The wettest day measured in São Mateus do Sul between 1940 and 2025 was 18 January 1977, with 123 mm of rain in 24 hours.
What was the windiest day in São Mateus do Sul?
The windiest day measured in São Mateus do Sul between 1940 and 2025 was 15 September 1956, with winds reaching 51.2 km/h.
What is the warmest month in São Mateus do Sul?
The warmest month in São Mateus do Sul is January (21.5 °C on average); the coldest is July (13.4 °C).
How much does it rain in São Mateus do Sul?
São Mateus do Sul receives on average 1,436 mm of precipitation per year, spread over about 158 rainy days.
Is it sunny in São Mateus do Sul?
São Mateus do Sul gets on average 8.3 hours of sunshine per day, roughly 3,030 hours per year over 1940-2025.
What is the biggest single-day snowfall in São Mateus do Sul?
The heaviest 24-hour snowfall measured in São Mateus do Sul between 1940 and 2025 was 20 July 1981, with 1.5 cm.
Are there tropical nights in São Mateus do Sul?
Yes: São Mateus do Sul has on average 6 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in São Mateus do Sul?
In São Mateus do Sul, between 1940 and 2025, the highest apparent temperature reached 39.3 °C on 19 January 1988, and the lowest was -10.3 °C on 18 July 1975.
Compare São Mateus do Sul with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around São Mateus do Sul