San Antonio in Fall
In fall (March, April and May), San Antonio sees average daytime highs around 23°C and overnight lows near 15°C, with 50 mm of rain over about 12 wet days across the season. It is the 2nd-warmest season and the 2nd-wettest season.
Across fall, daytime highs hold fairly steady around 23°C. The sky is clear or mostly clear about 42% of the time across fall, and the air most often feels dry.
Fall is San Antonio's 3rd-best season to visit on our travel score. For the whole year in context, see San Antonio's year-round climate.
- Avg daytime high
- 23°C
- 2nd-warmest season
- Avg overnight low
- 15°C
- Rainfall
- 50 mm
- 12 wet days
- Avg wind
- 6 km/h
- Travel score
- 7.9
- 3rd-best season
- Months
- Mar · Apr · May
Temperature in San Antonio in Fall
Across fall, daytime highs hold fairly steady around 23°C.
A typical fall day in San Antonio reaches about 23°C and drops to 15°C overnight. The warmest of the three months is May, the coolest May.
San Antonio weather by month
How the three fall months (March, April and May) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 22° / 15° | 52 | 12 | 12.9 | 6.0 |
| Feb | 22° / 15° | 63 | 13.2 | 12.6 | 5.6 |
| Mar | 22° / 15° | 41 | 10.2 | 12.1 | 6.3 |
| Apr | 23° / 15° | 9 | 2.1 | 11.6 | 8.2 |
| May | 23° / 14° | 1 | 0.2 | 11.2 | 9.1 |
| Jun | 22° / 13° | 0 | 0.1 | 11 | 9.0 |
| Jul | 22° / 13° | 0 | 0.2 | 11.1 | 9.0 |
| Aug | 22° / 13° | 1 | 0.3 | 11.4 | 9.1 |
| Sep | 23° / 14° | 1 | 0.2 | 11.9 | 9.2 |
| Oct | 23° / 15° | 1 | 0.2 | 12.4 | 8.8 |
| Nov | 23° / 15° | 2 | 0.6 | 12.8 | 8.5 |
| Dec | 23° / 15° | 13 | 3.3 | 13 | 7.6 |
Cloud cover in Fall
The sky is clear or mostly clear about 42% of the time across fall.
Chance of precipitation in Fall
San Antonio gets around 50 mm of rain over 12 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 6 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 12 h 24 min in early March to 11 h 06 min by late May. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 6.0 kWh/m².
Is fall a good time to visit San Antonio?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is one of the better times to visit San Antonio for general sightseeing.
What to pack for San Antonio in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, San Antonio sees daytime highs around 23°C and nights near 15°C. Pack sun protection. Worth having: light clothes and rain gear. About 12 days see rain.
Sea temperature near San Antonio in Fall
The nearest coast averages about 20°C across fall — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 51 km away) is warmest in February at about 22°C and coldest in August near 17°C.
It's comfortable for a long swim from Dec 3 to Apr 19 — about 4.5 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 22 | 22 | 21 | 20 | 19 | 18 | 17 | 17 | 17 | 18 | 19 | 21 |
| Comfort | Refreshing | Refreshing | Refreshing | Refreshing | Cool | Cool | Cool | Cool | Cool | Cool | Cool | Refreshing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 22 | Refreshing |
| Feb | 22 | Refreshing |
| Mar | 21 | Refreshing |
| Apr | 20 | Refreshing |
| May | 19 | Cool |
| Jun | 18 | Cool |
| Jul | 17 | Cool |
| Aug | 17 | Cool |
| Sep | 17 | Cool |
| Oct | 18 | Cool |
| Nov | 19 | Cool |
| Dec | 21 | Refreshing |
UV index in San Antonio in Fall
Clear-sky midday UV across fall averages around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in San Antonio peaks around February 8 at about 18 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 9 (very high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 18 | 18 | 15 | 13 | 10 | 9 | 9 | 11 | 13 | 16 | 15 | 16 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high | Extreme | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 18 | Extreme |
| Feb | 18 | Extreme |
| Mar | 15 | Extreme |
| Apr | 13 | Extreme |
| May | 10 | Extreme |
| Jun | 9 | Very high |
| Jul | 9 | Very high |
| Aug | 11 | Extreme |
| Sep | 13 | Extreme |
| Oct | 16 | Extreme |
| Nov | 15 | Extreme |
| Dec | 16 | Extreme |
Where is San Antonio?
San Antonio sits at 17.2°S, 70.9°W, 1,455 m above sea level, in Peru. The nearest listed city is Moquegua, 2.0 km away.
Topography around San Antonio
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of San Antonio.
Within 3 km, the terrain around San Antonio has significant variations in elevation — a maximum elevation change of 466 m around an average of 1,486 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,183 m; within 80 km, extreme variations in elevation — a maximum elevation change of 5,786 m.
The land around San Antonio is covered by bare terrain (64%) within 3 km, bare terrain (90%) within 16 km, and bare terrain (76%) within 80 km.
Peru travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type A / B / C
- 220 V · 60 Hz
- Prices
- ≈ 51% of US
- price level, 2025
- GDP per capita
- $9,684
- 2025
- Happiness
- 6.0 / 10
- World Happiness, 2025
- Safe drinking water
- 49%
- of population, 2024
- Homicide rate
- 8.6
- per 100k, 2021
- Road deaths
- 13.6
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Moderate
- EF EPI 519
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for San Antonio (-17.2172°, -70.9259°, elevation 1,455 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.