San Isidro in Spring
In spring (September, October and November), San Isidro sees average daytime highs around 23°C and overnight lows near 11°C, with 194 mm of precipitation over about 28 wet days across the season. It is the 2nd-warmest season and the 3rd-wettest season.
Over the season highs climb from about 20°C in early September to 25°C by late November. The sky is clear or mostly clear about 51% of the time across spring, and the air most often feels dry.
Spring is San Isidro's best season of the year to visit on our travel score. For the whole year in context, see San Isidro's year-round climate.
- Avg daytime high
- 23°C
- 2nd-warmest season
- Avg overnight low
- 11°C
- Precipitation
- 194 mm
- 28 wet days
- Avg wind
- 8 km/h
- Travel score
- 7.1
- best season of the year
- Months
- Sep · Oct · Nov
Temperature in San Isidro in Spring
Over the season highs climb from about 20°C in early September to 25°C by late November.
A typical spring day in San Isidro reaches about 23°C and drops to 11°C overnight. The warmest of the three months is November, the coolest September.
San Isidro weather by month
How the three spring months (September, October and November) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 26° / 17° | 167 | 16.7 | 0 | 13.6 | 5.7 |
| Feb | 25° / 16° | 117 | 13.7 | 0 | 13 | 6.1 |
| Mar | 23° / 15° | 109 | 13.2 | 0 | 12.2 | 6.4 |
| Apr | 21° / 11° | 65 | 9.7 | 0.2 | 11.3 | 6.6 |
| May | 18° / 7° | 37 | 6.9 | 0.2 | 10.6 | 6.5 |
| Jun | 17° / 4° | 20 | 4.1 | 0.4 | 10.2 | 6.3 |
| Jul | 16° / 2° | 15 | 3.3 | 0.9 | 10.4 | 6.5 |
| Aug | 19° / 5° | 17 | 3.3 | 0.4 | 11 | 7.6 |
| Sep | 21° / 8° | 32 | 5.4 | 0.4 | 11.8 | 7.6 |
| Oct | 23° / 11° | 65 | 10 | 0 | 12.7 | 7.2 |
| Nov | 24° / 14° | 98 | 12.9 | 0 | 13.4 | 6.6 |
| Dec | 26° / 16° | 129 | 15.4 | 0 | 13.8 | 6.0 |
Cloud cover in Spring
The sky is clear or mostly clear about 51% of the time across spring.
Chance of precipitation in Spring
San Isidro gets around 194 mm of rain and snow over 28 wet days across spring. The line is the day-by-day chance of measurable precipitation.
Humidity in Spring
Most of spring feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Spring
Winds average 8 km/h across spring.
Sunrise & sunset in Spring
Daylight runs from about 11 h 24 min in early September to 13 h 42 min by late November. The lit band spans sunrise to sunset each day.
Solar energy in Spring
Average shortwave solar energy reaching the ground each day across spring, about 6.0 kWh/m².
Hazard calendar for San Isidro
In spring, San Isidro overlaps its rainy season season. The full year is below, with each hazard's peak months called out.
San Isidro's rainy season runs November–March, when most of the year's rain falls.
Is spring a good time to visit San Isidro?
Our two travel scores rate spring for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
spring is one of the better times to visit San Isidro for general sightseeing.
What to pack for San Isidro in Spring
From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In spring, San Isidro sees daytime highs around 23°C and nights near 11°C. Pack sun protection. Worth having: light clothes, a warm layer and rain gear. About 28 days see rain.
UV index in San Isidro in Spring
Clear-sky midday UV across spring averages around 11 (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 Isidro peaks around January 18 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 4 (moderate).
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) | 15 | 14 | 12 | 7 | 5 | 4 | 4 | 6 | 8 | 12 | 13 | 14 |
| Level | Extreme | Extreme | Extreme | Very high | High | Moderate | Moderate | High | Very high | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 15 | Extreme |
| Feb | 14 | Extreme |
| Mar | 12 | Extreme |
| Apr | 7 | Very high |
| May | 5 | High |
| Jun | 4 | Moderate |
| Jul | 4 | Moderate |
| Aug | 6 | High |
| Sep | 8 | Very high |
| Oct | 12 | Extreme |
| Nov | 13 | Extreme |
| Dec | 14 | Extreme |
Where is San Isidro?
San Isidro sits at 28.5°S, 65.7°W, 518 m above sea level, in Argentina. The nearest listed city is Catamarca, 6.0 km away.
Topography around San Isidro
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of San Isidro.
Within 3 km, the terrain around San Isidro has only modest variations in elevation — a maximum elevation change of 134 m around an average of 522 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,541 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,232 m.
The land around San Isidro is covered by artificial surfaces (33%), trees (24%) and shrubs (21%) within 3 km, trees (40%) and shrubs (38%) within 16 km, and shrubs (44%) and trees (24%) within 80 km.
Argentina travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type C / I
- 220 V · 50 Hz
- Prices
- ≈ 46% of US
- price level, 2025
- GDP per capita
- $14,898
- 2025
- Happiness
- 6.4 / 10
- World Happiness, 2025
- Homicide rate
- 4.5
- per 100k, 2023
- Road deaths
- 14.1
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- High
- EF EPI 575
- 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 Isidro (-28.4578°, -65.725°, elevation 518 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.