Rosario de la Frontera climate — normals and trends
Rosario de la Frontera (Argentina) has a subtropical highland, dry winter climate (Cwb) under the Köppen-Geiger classification. Its mean annual temperature is 17.0 °C and it receives 1,434 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 (11.2 °C). Rainfall peaks in January.
Rosario de la Frontera averages 4 frost days, 29 hot days (≥ 30 °C) and 164 rainy days per year.
Rosario de la Frontera has warmed by +1.5 °C between 1940 and 2025, or +0.18 °C per decade. This trend is statistically significant.
The number of frost days there went from about 1 to 7 per year over the period.
The hottest day of the period reached 40.3 °C (on 27 October 2019) and the coldest -6.9 °C (on 15 June 1961).
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
Rosario de la FronteraSalta
- coords
- -25.80°, -64.97°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
17.0°C
Average daily high
22.7°C
Average daily low
12.3°C
Annual rainfall
1,434mm
Sunshine / day
9.1h
Mean relative humidity
74%
Average peak wind
12.5km/h
Seasonal range
10.3°C
Frost days (< 0 °C)
4 d/yr
Hot days (≥ 30 °C)
29 d/yr
Rainy days (≥ 1 mm)
164 d/yr
Annual snowfall
0.6 cm
Average feels-like high
23.1 °C
Average feels-like low
11.7 °C
Average peak gust
31.8 km/h
Tropical nights (≥ 20 °C)
6 d/yr
Solar radiation
16.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.5 °C
since 1940
+0.2 °C per decade · r² = 0.54 · 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
40.3 °C
27 October 2019
Coldest day
-6.9 °C
15 June 1961
Wettest day
168 mm
9 March 1947
Windiest day
40.4 km/h
28 June 1941
Strongest gust
78.1 km/h
27 January 1976
Hottest feels-like
42.0 °C
12 December 1988
Coldest feels-like
-11.0 °C
15 June 1961
Snowiest day
3.3 cm
16 July 2010
Sunniest day
13.6 h
7 December 1941
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 | 27.7 °C | +1.3 °C | 285 mm | +8 mm |
| Feb | 30.0 °C | +4.6 °C | 157 mm | -74 mm |
| Mar | 23.8 °C | -0.1 °C | 157 mm | -44 mm |
| Apr | 21.1 °C | -0.4 °C | 50 mm | -45 mm |
| May | 21.4 °C | +2.0 °C | 25 mm | -22 mm |
| Jun | 17.5 °C | -0.3 °C | 8 mm | -15 mm |
| Jul | 18.9 °C | +0.6 °C | 19 mm | -1 mm |
| Aug | 21.5 °C | +0.8 °C | 11 mm | -11 mm |
| Sep | 25.0 °C | +2.3 °C | 21 mm | -19 mm |
| Oct | 26.3 °C | +1.8 °C | 59 mm | -40 mm |
| Nov | 28.0 °C | +2.6 °C | 59 mm | -97 mm |
| Dec | 27.2 °C | +0.8 °C | 267 mm | +42 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 Rosario de la Frontera?
Rosario de la Frontera has a subtropical highland, dry winter climate (Köppen Cwb). Over 1940-2025, the average annual temperature is 17.0 °C and it receives 1,434 mm of precipitation per year.
What is the hottest day ever recorded in Rosario de la Frontera?
The hottest day measured in Rosario de la Frontera between 1940 and 2025 was 27 October 2019, reaching 40.3 °C.
What is the coldest day in Rosario de la Frontera?
The coldest day measured in Rosario de la Frontera between 1940 and 2025 was 15 June 1961, at -6.9 °C.
Does it snow in Rosario de la Frontera?
Almost never: Rosario de la Frontera sees virtually no snow, with about 4 frost days per year.
Has the climate of Rosario de la Frontera warmed?
Yes: Rosario de la Frontera warmed by +1.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Rosario de la Frontera?
The wettest day measured in Rosario de la Frontera between 1940 and 2025 was 9 March 1947, with 168 mm of rain in 24 hours.
What was the windiest day in Rosario de la Frontera?
The windiest day measured in Rosario de la Frontera between 1940 and 2025 was 28 June 1941, with winds reaching 40.4 km/h.
What is the warmest month in Rosario de la Frontera?
The warmest month in Rosario de la Frontera is January (21.5 °C on average); the coldest is July (11.2 °C).
How much does it rain in Rosario de la Frontera?
Rosario de la Frontera receives on average 1,434 mm of precipitation per year, spread over about 164 rainy days.
Is it sunny in Rosario de la Frontera?
Rosario de la Frontera gets on average 9.1 hours of sunshine per day, roughly 3,322 hours per year over 1940-2025.
What is the biggest single-day snowfall in Rosario de la Frontera?
The heaviest 24-hour snowfall measured in Rosario de la Frontera between 1940 and 2025 was 16 July 2010, with 3.3 cm.
Are there tropical nights in Rosario de la Frontera?
Yes: Rosario de la Frontera has on average 6 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Rosario de la Frontera?
In Rosario de la Frontera, between 1940 and 2025, the highest apparent temperature reached 42.0 °C on 12 December 1988, and the lowest was -11.0 °C on 15 June 1961.
Compare Rosario de la Frontera with another city
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Nearby cities
The climate around Rosario de la Frontera