San Pedro climate — normals and trends
San Pedro (Argentina) has a humid subtropical climate (Cfa) under the Köppen-Geiger classification. Its mean annual temperature is 17.4 °C and it receives 973 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 (24.6 °C on average) and the coldest is July (10.5 °C). Rainfall peaks in March.
San Pedro averages 4 frost days, 55 hot days (≥ 30 °C) and 88 rainy days per year.
No statistically significant temperature trend emerges for San Pedro between 1940 and 2025: over this span, year-to-year swings outweigh the climate signal.
The hottest day of the period reached 42.0 °C (on 14 January 2022) and the coldest -5.4 °C (on 1 July 2025).
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
San PedroBuenos Aires
- coords
- -33.68°, -59.67°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
17.4°C
Average daily high
22.9°C
Average daily low
12.5°C
Annual rainfall
973mm
Sunshine / day
9.6h
Mean relative humidity
72%
Average peak wind
17.2km/h
Seasonal range
14.1°C
Frost days (< 0 °C)
4 d/yr
Hot days (≥ 30 °C)
55 d/yr
Rainy days (≥ 1 mm)
88 d/yr
Annual snowfall
0.0 cm
Average feels-like high
22.8 °C
Average feels-like low
11.2 °C
Average peak gust
33.5 km/h
Tropical nights (≥ 20 °C)
36 d/yr
Solar radiation
17.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
No clear trend over this period
Over a short window, year-to-year swings outweigh the climate signal. Try 86 years.
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
42.0 °C
14 January 2022
Coldest day
-5.4 °C
1 July 2025
Wettest day
117 mm
18 March 1975
Windiest day
54.6 km/h
29 May 1984
Strongest gust
101.9 km/h
16 May 2000
Hottest feels-like
43.6 °C
13 January 2022
Coldest feels-like
-9.5 °C
1 July 2025
Snowiest day
0.8 cm
7 July 1960
Sunniest day
14.0 h
4 January 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 | 32.6 °C | +2.2 °C | 96 mm | +2 mm |
| Feb | 30.7 °C | +1.7 °C | 106 mm | +2 mm |
| Mar | 27.3 °C | +0.5 °C | 100 mm | -16 mm |
| Apr | 22.6 °C | -0.3 °C | 59 mm | -33 mm |
| May | 20.5 °C | +1.5 °C | 132 mm | +63 mm |
| Jun | 15.3 °C | -0.5 °C | 15 mm | -29 mm |
| Jul | 16.6 °C | +1.1 °C | 41 mm | -8 mm |
| Aug | 18.3 °C | +0.9 °C | 143 mm | +86 mm |
| Sep | 20.6 °C | +0.8 °C | 93 mm | +24 mm |
| Oct | 24.4 °C | +1.8 °C | 72 mm | -33 mm |
| Nov | 25.8 °C | -0.2 °C | 112 mm | +20 mm |
| Dec | 31.1 °C | +2.1 °C | 42 mm | -43 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 San Pedro?
San Pedro has a humid subtropical climate (Köppen Cfa). Over 1940-2025, the average annual temperature is 17.4 °C and it receives 973 mm of precipitation per year.
What is the hottest day ever recorded in San Pedro?
The hottest day measured in San Pedro between 1940 and 2025 was 14 January 2022, reaching 42.0 °C.
What is the coldest day in San Pedro?
The coldest day measured in San Pedro between 1940 and 2025 was 1 July 2025, at -5.4 °C.
Does it snow in San Pedro?
Almost never: San Pedro sees virtually no snow, with about 4 frost days per year.
Has the climate of San Pedro warmed?
Between 1940 and 2025, no statistically significant temperature trend emerges in San Pedro.
What is the wettest day in San Pedro?
The wettest day measured in San Pedro between 1940 and 2025 was 18 March 1975, with 117 mm of rain in 24 hours.
What was the windiest day in San Pedro?
The windiest day measured in San Pedro between 1940 and 2025 was 29 May 1984, with winds reaching 54.6 km/h.
What is the warmest month in San Pedro?
The warmest month in San Pedro is January (24.6 °C on average); the coldest is July (10.5 °C).
How much does it rain in San Pedro?
San Pedro receives on average 973 mm of precipitation per year, spread over about 88 rainy days.
Is it sunny in San Pedro?
San Pedro gets on average 9.6 hours of sunshine per day, roughly 3,504 hours per year over 1940-2025.
What is the biggest single-day snowfall in San Pedro?
The heaviest 24-hour snowfall measured in San Pedro between 1940 and 2025 was 7 July 1960, with 0.8 cm.
Are there tropical nights in San Pedro?
Yes: San Pedro has on average 36 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in San Pedro?
In San Pedro, between 1940 and 2025, the highest apparent temperature reached 43.6 °C on 13 January 2022, and the lowest was -9.5 °C on 1 July 2025.
Compare San Pedro with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around San Pedro