San Antonio climate — normals and trends
San Antonio (Peru) has a cold desert climate (BWk) under the Köppen-Geiger classification. Its mean annual temperature is 17.1 °C and it receives 198 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 March (17.4 °C on average) and the coldest is July (16.3 °C). Rainfall peaks in February.
San Antonio averages 0 frost days, 0 hot days (≥ 30 °C) and 48 rainy days per year.
San Antonio has warmed by +1.5 °C between 1940 and 2025, or +0.18 °C per decade. This trend is statistically significant.
The hottest day of the period reached 28.1 °C (on 17 April 1979) and the coldest 3.6 °C (on 18 August 1960).
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 AntonioMoquegua Department
- coords
- -17.22°, -70.93°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
17.1°C
Average daily high
22.1°C
Average daily low
13.6°C
Annual rainfall
198mm
Sunshine / day
11.3h
Mean relative humidity
60%
Average peak wind
13.2km/h
Seasonal range
1.1°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
48 d/yr
Annual snowfall
0.0 cm
Average feels-like high
21.8 °C
Average feels-like low
12.4 °C
Average peak gust
32.4 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
23.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.5 °C
since 1940
+0.2 °C per decade · r² = 0.53 · 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
28.1 °C
17 April 1979
Coldest day
3.6 °C
18 August 1960
Wettest day
28 mm
8 February 2019
Windiest day
21.3 km/h
25 November 1945
Strongest gust
47.9 km/h
25 November 1945
Hottest feels-like
29.7 °C
1 February 1998
Coldest feels-like
1.2 °C
18 August 1960
Sunniest day
12.9 h
8 December 2025
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 | 22.5 °C | +0.8 °C | 65 mm | +11 mm |
| Feb | 22.1 °C | +0.5 °C | 103 mm | +41 mm |
| Mar | 23.0 °C | +1.2 °C | 27 mm | -17 mm |
| Apr | 23.7 °C | +1.4 °C | 2 mm | -8 mm |
| May | 23.7 °C | +1.3 °C | 0 mm | -2 mm |
| Jun | 21.8 °C | +0.3 °C | 0 mm | -1 mm |
| Jul | 23.1 °C | +1.7 °C | 0 mm | -0 mm |
| Aug | 22.3 °C | +0.3 °C | 0 mm | -1 mm |
| Sep | 23.7 °C | +1.2 °C | 1 mm | -0 mm |
| Oct | 23.9 °C | +1.2 °C | 0 mm | -1 mm |
| Nov | 23.6 °C | +1.1 °C | 0 mm | -5 mm |
| Dec | 23.3 °C | +0.9 °C | 5 mm | -11 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 Antonio?
San Antonio has a cold desert climate (Köppen BWk). Over 1940-2025, the average annual temperature is 17.1 °C and it receives 198 mm of precipitation per year.
What is the hottest day ever recorded in San Antonio?
The hottest day measured in San Antonio between 1940 and 2025 was 17 April 1979, reaching 28.1 °C.
What is the coldest day in San Antonio?
The coldest day measured in San Antonio between 1940 and 2025 was 18 August 1960, at 3.6 °C.
Does it snow in San Antonio?
Almost never: San Antonio sees virtually no snow, with about 0 frost days per year.
Has the climate of San Antonio warmed?
Yes: San Antonio warmed by +1.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in San Antonio?
The wettest day measured in San Antonio between 1940 and 2025 was 8 February 2019, with 28 mm of rain in 24 hours.
What was the windiest day in San Antonio?
The windiest day measured in San Antonio between 1940 and 2025 was 25 November 1945, with winds reaching 21.3 km/h.
What is the warmest month in San Antonio?
The warmest month in San Antonio is March (17.4 °C on average); the coldest is July (16.3 °C).
How much does it rain in San Antonio?
San Antonio receives on average 198 mm of precipitation per year, spread over about 48 rainy days.
Is it sunny in San Antonio?
San Antonio gets on average 11.3 hours of sunshine per day, roughly 4,125 hours per year over 1940-2025.
Are there tropical nights in San Antonio?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in San Antonio.
What was the most extreme apparent temperature in San Antonio?
In San Antonio, between 1940 and 2025, the highest apparent temperature reached 29.7 °C on 1 February 1998, and the lowest was 1.2 °C on 18 August 1960.
Compare San Antonio with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around San Antonio