Las Heras climate — normals and trends
Las Heras (Argentina) has a cold semi-arid climate (BSk) under the Köppen-Geiger classification. Its mean annual temperature is 10.3 °C and it receives 218 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 (17.7 °C on average) and the coldest is July (2.4 °C). Rainfall peaks in June.
Las Heras averages 64 frost days, 7 hot days (≥ 30 °C) and 50 rainy days per year.
Las Heras has warmed by +3.2 °C between 1940 and 2025, or +0.37 °C per decade. This trend is statistically significant.
The number of frost days there went from about 90 to 38 per year over the period.
The hottest day of the period reached 38.3 °C (on 21 January 2013) and the coldest -19.4 °C (on 24 July 1940).
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
Las HerasSanta Cruz
- coords
- -46.54°, -68.93°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
10.3°C
Average daily high
15.7°C
Average daily low
5.5°C
Annual rainfall
218mm
Sunshine / day
10.3h
Mean relative humidity
53%
Average peak wind
29.0km/h
Seasonal range
15.3°C
Frost days (< 0 °C)
64 d/yr
Hot days (≥ 30 °C)
7 d/yr
Rainy days (≥ 1 mm)
50 d/yr
Annual snowfall
29.1 cm
Average feels-like high
10.5 °C
Average feels-like low
0.8 °C
Average peak gust
53.7 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
16.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+3.2 °C
since 1940
+0.4 °C per decade · r² = 0.70 · 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
38.3 °C
21 January 2013
Coldest day
-19.4 °C
24 July 1940
Wettest day
54 mm
23 February 2013
Windiest day
75.0 km/h
17 November 2025
Strongest gust
134.3 km/h
17 November 2025
Hottest feels-like
35.5 °C
21 January 2013
Coldest feels-like
-24.7 °C
24 July 1940
Snowiest day
19.5 cm
4 May 1970
Sunniest day
15.1 h
28 December 2025
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 25.6 °C | +1.8 °C | 23 mm | +9 mm |
| Feb | 22.7 °C | -0.7 °C | 15 mm | +2 mm |
| Mar | 20.6 °C | +0.4 °C | 61 mm | +45 mm |
| Apr | 14.9 °C | -0.6 °C | 43 mm | +22 mm |
| May | 11.2 °C | +0.8 °C | 24 mm | -1 mm |
| Jun | 8.2 °C | +1.7 °C | 18 mm | -8 mm |
| Jul | 8.9 °C | +2.6 °C | 15 mm | -6 mm |
| Aug | 11.1 °C | +1.9 °C | 15 mm | -6 mm |
| Sep | 14.5 °C | +1.4 °C | 24 mm | +6 mm |
| Oct | 17.5 °C | +0.5 °C | 11 mm | -7 mm |
| Nov | 22.9 °C | +2.5 °C | 5 mm | -9 mm |
| Dec | 23.3 °C | +0.7 °C | 5 mm | -10 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 Las Heras?
Las Heras has a cold semi-arid climate (Köppen BSk). Over 1940-2025, the average annual temperature is 10.3 °C and it receives 218 mm of precipitation per year.
What is the hottest day ever recorded in Las Heras?
The hottest day measured in Las Heras between 1940 and 2025 was 21 January 2013, reaching 38.3 °C.
What is the coldest day in Las Heras?
The coldest day measured in Las Heras between 1940 and 2025 was 24 July 1940, at -19.4 °C.
Does it snow in Las Heras?
Yes. Las Heras gets on average 29.1 cm of snow per year and has around 64 frost days.
Has the climate of Las Heras warmed?
Yes: Las Heras warmed by +3.2 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Las Heras?
The wettest day measured in Las Heras between 1940 and 2025 was 23 February 2013, with 54 mm of rain in 24 hours.
What was the windiest day in Las Heras?
The windiest day measured in Las Heras between 1940 and 2025 was 17 November 2025, with winds reaching 75.0 km/h.
What is the warmest month in Las Heras?
The warmest month in Las Heras is January (17.7 °C on average); the coldest is July (2.4 °C).
How much does it rain in Las Heras?
Las Heras receives on average 218 mm of precipitation per year, spread over about 50 rainy days.
Is it sunny in Las Heras?
Las Heras gets on average 10.3 hours of sunshine per day, roughly 3,760 hours per year over 1940-2025.
What is the biggest single-day snowfall in Las Heras?
The heaviest 24-hour snowfall measured in Las Heras between 1940 and 2025 was 4 May 1970, with 19.5 cm.
Are there tropical nights in Las Heras?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Las Heras.
What was the most extreme apparent temperature in Las Heras?
In Las Heras, between 1940 and 2025, the highest apparent temperature reached 35.5 °C on 21 January 2013, and the lowest was -24.7 °C on 24 July 1940.
Compare Las Heras with another city
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Nearby cities
The climate around Las Heras