San Justo in Spring
In spring (September, October and November), San Justo sees average daytime highs around 21°C and overnight lows near 12°C, with 274 mm of rain over about 24 wet days across the season. It is the 3rd-warmest season and the wettest season of the year.
Over the season highs climb from about 17°C in early September to 26°C by late November. The sky is clear or mostly clear about 40% of the time across spring, and the air most often feels dry.
Spring is San Justo's 2nd-best season to visit on our travel score. For the whole year in context, see San Justo's year-round climate.
- Avg daytime high
- 21°C
- 3rd-warmest season
- Avg overnight low
- 12°C
- Rainfall
- 274 mm
- 24 wet days
- Avg wind
- 14 km/h
- Travel score
- 6.8
- 2nd-best season
- Months
- Sep · Oct · Nov
Temperature in San Justo in Spring
Over the season highs climb from about 17°C in early September to 26°C by late November.
A typical spring day in San Justo reaches about 21°C and drops to 12°C overnight. The warmest of the three months is November, the coolest September.
San Justo 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 | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 29° / 19° | 87 | 7.4 | 14.1 | 6.3 |
| Feb | 28° / 18° | 92 | 8.2 | 13.3 | 6.8 |
| Mar | 26° / 17° | 85 | 7.4 | 12.3 | 7.4 |
| Apr | 22° / 13° | 91 | 7.9 | 11.2 | 7.2 |
| May | 18° / 10° | 61 | 6.1 | 10.2 | 6.4 |
| Jun | 15° / 7° | 60 | 5.9 | 9.7 | 5.0 |
| Jul | 14° / 6° | 60 | 6.1 | 9.9 | 4.6 |
| Aug | 16° / 8° | 62 | 5.8 | 10.7 | 5.7 |
| Sep | 18° / 9° | 72 | 6.7 | 11.8 | 6.4 |
| Oct | 21° / 12° | 109 | 9.1 | 12.9 | 6.7 |
| Nov | 24° / 15° | 93 | 8.4 | 13.8 | 7.3 |
| Dec | 27° / 17° | 85 | 8.6 | 14.3 | 6.8 |
Cloud cover in Spring
The sky is clear or mostly clear about 40% of the time across spring.
Chance of precipitation in Spring
San Justo gets around 274 mm of rain over 24 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 14 km/h across spring.
Sunrise & sunset in Spring
Daylight runs from about 11 h 12 min in early September to 14 h 06 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 5.6 kWh/m².
Is spring a good time to visit San Justo?
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 a reasonable time to visit San Justo for sightseeing.
What to pack for San Justo in Spring
From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In spring, San Justo sees daytime highs around 21°C and nights near 12°C. Pack sun protection. Worth having: light clothes and rain gear. About 24 days see rain.
Sea temperature near San Justo in Spring
The nearest coast averages about 18°C across spring — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 18 km away) is warmest in January at about 25°C and coldest in July near 13°C.
It's comfortable for a long swim from Nov 9 to Apr 20 — about 5.4 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 25 | 25 | 23 | 21 | 17 | 14 | 13 | 13 | 15 | 18 | 21 | 23 |
| Comfort | Warm | Warm | Refreshing | Refreshing | Cool | Bracing | Bracing | Bracing | Cool | Cool | Refreshing | Refreshing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 25 | Warm |
| Feb | 25 | Warm |
| Mar | 23 | Refreshing |
| Apr | 21 | Refreshing |
| May | 17 | Cool |
| Jun | 14 | Bracing |
| Jul | 13 | Bracing |
| Aug | 13 | Bracing |
| Sep | 15 | Cool |
| Oct | 18 | Cool |
| Nov | 21 | Refreshing |
| Dec | 23 | Refreshing |
UV index in San Justo in Spring
Clear-sky midday UV across spring averages around 8 (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 Justo peaks around January 14 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 at about 3 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 13 | 11 | 10 | 6 | 3 | 3 | 3 | 4 | 6 | 8 | 11 | 12 |
| Level | Extreme | Extreme | Very high | High | Moderate | Moderate | Moderate | Moderate | High | Very high | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 13 | Extreme |
| Feb | 11 | Extreme |
| Mar | 10 | Very high |
| Apr | 6 | High |
| May | 3 | Moderate |
| Jun | 3 | Moderate |
| Jul | 3 | Moderate |
| Aug | 4 | Moderate |
| Sep | 6 | High |
| Oct | 8 | Very high |
| Nov | 11 | Extreme |
| Dec | 12 | Extreme |
Air quality in San Justo in Spring
Average fine-particle pollution (PM2.5) through the year — so you can see where spring falls, not just the annual average.
Air quality in San Justo is worst in June — around 25 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (December, 12 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 13 | 14 | 16 | 17 | 22 | 25 | 25 | 24 | 19 | 16 | 13 | 12 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 13 | Moderate |
| Feb | 14 | Moderate |
| Mar | 16 | Moderate |
| Apr | 17 | Moderate |
| May | 22 | Moderate |
| Jun | 25 | Moderate |
| Jul | 25 | Moderate |
| Aug | 24 | Moderate |
| Sep | 19 | Moderate |
| Oct | 16 | Moderate |
| Nov | 13 | Moderate |
| Dec | 12 | Moderate |
Where is San Justo?
San Justo sits at 34.7°S, 58.6°W, 29 m above sea level, in Argentina. The nearest listed city is Isidro Casanova, 3.0 km away.
Topography around San Justo
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of San Justo.
Within 3 km, the terrain around San Justo has only modest variations in elevation — a maximum elevation change of 28 m around an average of 28 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 53 m; within 80 km, only modest variations in elevation — a maximum elevation change of 138 m.
The land around San Justo is covered by artificial surfaces (89%) within 3 km, artificial surfaces (70%) within 16 km, and grassland (31%), cropland (24%) and water (20%) 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 Justo (-34.6811°, -58.5638°, elevation 29 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.