San Isidro weather in October
In October, San Isidro sees average daytime highs of 20°C and overnight lows near 14°C, with 119 mm of rain across 9.8 wet days and about 12.9 hours of daylight. It is the 7th-warmest and 1st-wettest month of the year here.
Highs climb over the month, from about 19°C in the first days to 21°C by the end. The sky is clear or mostly clear about 39% of the time in October, and the air most often feels dry.
Daylight stretches from about 12 h 18 min at the start of October to 13 h 24 min by month's end. Set against the rest of the year, October is San Isidro's 9th-clearest and 2nd-windiest month. For the whole year in context, see San Isidro's year-round climate.
- Daytime high
- 20°
- 7th warmest
- Overnight low
- 14°
- 6th coldest
- Rainfall
- 119 mm
- 9.8 wet days
- Daylight
- 12 h 54 min
- 6:13 AM – 7:06 PM
- Cloud cover
- 54%
- 9th clearest
- Wind
- 17 km/h
- 2nd windiest
- Solar energy
- 5.54 kWh/m²
- Travel score
- 6.5
- out of 10
San Isidro is city in Buenos Aires Province, Argentina.
- Founded
- 1706
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in October
Highs climb over the month, from about 19°C in the first days to 21°C by the end.
A typical October day in San Isidro reaches about 20°C in the afternoon and slips back to 14°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 24°C. Set against its neighbours, October runs about 3°C warmer than September and about 3°C cooler than November.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 18 | 18 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 |
| Avg low (°C) | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 15 | 15 | 15 | 15 | 15 | 15 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 18 | 12 |
| 2 | 18 | 12 |
| 3 | 19 | 12 |
| 4 | 19 | 13 |
| 5 | 19 | 13 |
| 6 | 19 | 13 |
| 7 | 19 | 13 |
| 8 | 19 | 13 |
| 9 | 19 | 13 |
| 10 | 19 | 13 |
| 11 | 20 | 13 |
| 12 | 20 | 14 |
| 13 | 20 | 14 |
| 14 | 20 | 14 |
| 15 | 20 | 14 |
| 16 | 20 | 14 |
| 17 | 20 | 14 |
| 18 | 20 | 14 |
| 19 | 20 | 14 |
| 20 | 21 | 14 |
| 21 | 21 | 14 |
| 22 | 21 | 14 |
| 23 | 21 | 14 |
| 24 | 21 | 14 |
| 25 | 21 | 14 |
| 26 | 21 | 15 |
| 27 | 21 | 15 |
| 28 | 21 | 15 |
| 29 | 21 | 15 |
| 30 | 21 | 15 |
| 31 | 21 | 15 |
San Isidro weather by month
How October compares with the rest of the year at a glance. October is the 7th-warmest and 1st-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 27° / 20° | 83 | 6.9 | 14 | 7.2 |
| Feb | 26° / 20° | 99 | 8.1 | 13.3 | 7.1 |
| Mar | 25° / 18° | 96 | 7.6 | 12.3 | 7.5 |
| Apr | 21° / 15° | 102 | 8.1 | 11.2 | 7.0 |
| May | 17° / 12° | 72 | 6.8 | 10.2 | 6.1 |
| Jun | 15° / 9° | 74 | 7.7 | 9.7 | 4.6 |
| Jul | 14° / 8° | 74 | 7.1 | 9.9 | 4.2 |
| Aug | 15° / 9° | 71 | 6.6 | 10.7 | 5.2 |
| Sep | 17° / 11° | 80 | 7.1 | 11.8 | 6.0 |
| Oct | 20° / 14° | 119 | 9.8 | 12.9 | 6.5 |
| Nov | 23° / 16° | 95 | 8.2 | 13.8 | 7.3 |
| Dec | 26° / 19° | 87 | 8.1 | 14.3 | 7.3 |
Cloud cover in October
The sky is clear or mostly clear about 39% of the time in October.
Beyond those clear spells, partly cloudy skies cover about 13% of October, with mostly cloudy or overcast conditions the remaining 47%.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 51 | 51 | 51 | 50 | 50 | 50 | 50 | 50 | 51 | 50 | 51 | 51 | 52 | 52 | 52 | 52 | 52 | 53 | 53 | 53 | 54 | 54 | 54 | 54 | 54 | 55 | 55 | 55 | 56 | 56 | 57 |
| Cloudier (%) | 49 | 49 | 49 | 50 | 50 | 50 | 50 | 50 | 49 | 50 | 49 | 49 | 48 | 48 | 48 | 48 | 48 | 47 | 47 | 47 | 46 | 46 | 46 | 46 | 46 | 45 | 45 | 45 | 44 | 44 | 43 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 51 | 49 |
| 2 | 51 | 49 |
| 3 | 51 | 49 |
| 4 | 50 | 50 |
| 5 | 50 | 50 |
| 6 | 50 | 50 |
| 7 | 50 | 50 |
| 8 | 50 | 50 |
| 9 | 51 | 49 |
| 10 | 50 | 50 |
| 11 | 51 | 49 |
| 12 | 51 | 49 |
| 13 | 52 | 48 |
| 14 | 52 | 48 |
| 15 | 52 | 48 |
| 16 | 52 | 48 |
| 17 | 52 | 48 |
| 18 | 53 | 47 |
| 19 | 53 | 47 |
| 20 | 53 | 47 |
| 21 | 54 | 46 |
| 22 | 54 | 46 |
| 23 | 54 | 46 |
| 24 | 54 | 46 |
| 25 | 54 | 46 |
| 26 | 55 | 45 |
| 27 | 55 | 45 |
| 28 | 55 | 45 |
| 29 | 56 | 44 |
| 30 | 56 | 44 |
| 31 | 57 | 43 |
Chance of precipitation in October
San Isidro gets around 119 mm of rain over 9.8 wet days in October, the wettest month. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 30% and peaks near 31% on the wettest days.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 28 | 28 | 29 | 29 | 30 | 30 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 30 | 30 | 30 | 30 | 30 | 30 |
| Rain chance (%) | |
|---|---|
| 1 | 28 |
| 2 | 28 |
| 3 | 29 |
| 4 | 29 |
| 5 | 30 |
| 6 | 30 |
| 7 | 31 |
| 8 | 31 |
| 9 | 31 |
| 10 | 31 |
| 11 | 31 |
| 12 | 31 |
| 13 | 31 |
| 14 | 31 |
| 15 | 31 |
| 16 | 31 |
| 17 | 31 |
| 18 | 31 |
| 19 | 31 |
| 20 | 31 |
| 21 | 31 |
| 22 | 31 |
| 23 | 31 |
| 24 | 31 |
| 25 | 31 |
| 26 | 30 |
| 27 | 30 |
| 28 | 30 |
| 29 | 30 |
| 30 | 30 |
| 31 | 30 |
Humidity in October
Most of October feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, October lands in the dry band about 56% of days. It rarely turns muggy — the humid and sticky bands barely register.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 73 | 71 | 70 | 68 | 66 | 65 | 63 | 62 | 61 | 60 | 59 | 58 | 58 | 56 | 55 | 55 | 54 | 53 | 52 | 51 | 51 | 51 | 50 | 50 | 49 | 48 | 47 | 46 | 45 | 44 | 43 |
| Comfortable (%) | 22 | 23 | 24 | 25 | 25 | 26 | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 30 | 31 | 31 | 32 | 32 | 33 |
| Humid (%) | 5 | 6 | 6 | 7 | 8 | 8 | 9 | 10 | 11 | 11 | 12 | 13 | 13 | 14 | 15 | 15 | 16 | 16 | 17 | 18 | 18 | 18 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 20 | 20 |
| Muggy (%) | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 4 | 4 | 4 | 4 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | |
|---|---|---|---|---|
| 1 | 73 | 22 | 5 | 0 |
| 2 | 71 | 23 | 6 | 0 |
| 3 | 70 | 24 | 6 | 0 |
| 4 | 68 | 25 | 7 | 0 |
| 5 | 66 | 25 | 8 | 1 |
| 6 | 65 | 26 | 8 | 1 |
| 7 | 63 | 27 | 9 | 1 |
| 8 | 62 | 27 | 10 | 1 |
| 9 | 61 | 27 | 11 | 1 |
| 10 | 60 | 28 | 11 | 1 |
| 11 | 59 | 28 | 12 | 1 |
| 12 | 58 | 28 | 13 | 1 |
| 13 | 58 | 28 | 13 | 1 |
| 14 | 56 | 29 | 14 | 1 |
| 15 | 55 | 29 | 15 | 1 |
| 16 | 55 | 29 | 15 | 1 |
| 17 | 54 | 29 | 16 | 1 |
| 18 | 53 | 29 | 16 | 2 |
| 19 | 52 | 29 | 17 | 2 |
| 20 | 51 | 29 | 18 | 2 |
| 21 | 51 | 29 | 18 | 2 |
| 22 | 51 | 29 | 18 | 2 |
| 23 | 50 | 29 | 19 | 3 |
| 24 | 50 | 29 | 19 | 3 |
| 25 | 49 | 29 | 19 | 3 |
| 26 | 48 | 30 | 19 | 3 |
| 27 | 47 | 31 | 19 | 3 |
| 28 | 46 | 31 | 19 | 4 |
| 29 | 45 | 32 | 19 | 4 |
| 30 | 44 | 32 | 20 | 4 |
| 31 | 43 | 33 | 20 | 4 |
Wind in October
Winds average 17 km/h in October.
Across October, daily wind ranges from about 17 km/h on the calmest days to 17 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 |
| Feels | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 17 | light breeze |
| 2 | 17 | light breeze |
| 3 | 17 | light breeze |
| 4 | 17 | light breeze |
| 5 | 17 | light breeze |
| 6 | 17 | light breeze |
| 7 | 17 | light breeze |
| 8 | 17 | light breeze |
| 9 | 17 | light breeze |
| 10 | 17 | light breeze |
| 11 | 17 | light breeze |
| 12 | 17 | light breeze |
| 13 | 17 | light breeze |
| 14 | 17 | light breeze |
| 15 | 17 | light breeze |
| 16 | 17 | light breeze |
| 17 | 17 | light breeze |
| 18 | 17 | light breeze |
| 19 | 17 | light breeze |
| 20 | 17 | light breeze |
| 21 | 17 | light breeze |
| 22 | 17 | light breeze |
| 23 | 17 | light breeze |
| 24 | 17 | light breeze |
| 25 | 17 | light breeze |
| 26 | 17 | light breeze |
| 27 | 17 | light breeze |
| 28 | 17 | light breeze |
| 29 | 17 | light breeze |
| 30 | 17 | light breeze |
| 31 | 17 | light breeze |
Sunrise & sunset in October
Daylight runs from about 12 h 18 min at the start of October to 13 h 24 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 66 minutes over October. Sunrise moves from 6:33 AM to 5:56 AM, and sunset from 6:53 PM to 7:19 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 12.3 | 12.4 | 12.4 | 12.5 | 12.5 | 12.5 | 12.6 | 12.6 | 12.6 | 12.7 | 12.7 | 12.7 | 12.8 | 12.8 | 12.8 | 12.9 | 12.9 | 12.9 | 13.0 | 13.0 | 13.1 | 13.1 | 13.1 | 13.2 | 13.2 | 13.2 | 13.3 | 13.3 | 13.3 | 13.3 | 13.4 |
| Sunrise (AM) | 6:33 | 6:31 | 6:30 | 6:29 | 6:27 | 6:26 | 6:24 | 6:23 | 6:22 | 6:20 | 6:19 | 6:18 | 6:17 | 6:15 | 6:14 | 6:13 | 6:11 | 6:10 | 6:09 | 6:08 | 6:07 | 6:06 | 6:04 | 6:03 | 6:02 | 6:01 | 6:00 | 5:59 | 5:58 | 5:57 | 5:56 |
| Sunset (PM) | 6:53 | 6:54 | 6:55 | 6:56 | 6:56 | 6:57 | 6:58 | 6:59 | 7:00 | 7:00 | 7:01 | 7:02 | 7:03 | 7:04 | 7:05 | 7:06 | 7:06 | 7:07 | 7:08 | 7:09 | 7:10 | 7:11 | 7:12 | 7:13 | 7:13 | 7:14 | 7:15 | 7:16 | 7:17 | 7:18 | 7:19 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.3 | 6:33 | 6:53 |
| 2 | 12.4 | 6:31 | 6:54 |
| 3 | 12.4 | 6:30 | 6:55 |
| 4 | 12.5 | 6:29 | 6:56 |
| 5 | 12.5 | 6:27 | 6:56 |
| 6 | 12.5 | 6:26 | 6:57 |
| 7 | 12.6 | 6:24 | 6:58 |
| 8 | 12.6 | 6:23 | 6:59 |
| 9 | 12.6 | 6:22 | 7:00 |
| 10 | 12.7 | 6:20 | 7:00 |
| 11 | 12.7 | 6:19 | 7:01 |
| 12 | 12.7 | 6:18 | 7:02 |
| 13 | 12.8 | 6:17 | 7:03 |
| 14 | 12.8 | 6:15 | 7:04 |
| 15 | 12.8 | 6:14 | 7:05 |
| 16 | 12.9 | 6:13 | 7:06 |
| 17 | 12.9 | 6:11 | 7:06 |
| 18 | 12.9 | 6:10 | 7:07 |
| 19 | 13.0 | 6:09 | 7:08 |
| 20 | 13.0 | 6:08 | 7:09 |
| 21 | 13.1 | 6:07 | 7:10 |
| 22 | 13.1 | 6:06 | 7:11 |
| 23 | 13.1 | 6:04 | 7:12 |
| 24 | 13.2 | 6:03 | 7:13 |
| 25 | 13.2 | 6:02 | 7:13 |
| 26 | 13.2 | 6:01 | 7:14 |
| 27 | 13.3 | 6:00 | 7:15 |
| 28 | 13.3 | 5:59 | 7:16 |
| 29 | 13.3 | 5:58 | 7:17 |
| 30 | 13.3 | 5:57 | 7:18 |
| 31 | 13.4 | 5:56 | 7:19 |
Solar energy in October
Average shortwave solar energy reaching the ground each day in October, about 5.54 kWh/m².
For context, solar energy here swings from a low near 2.25 kWh/m² to a high of 7.45 kWh/m² in December across the year — October's 5.54 kWh/m² falls in the middle.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 5.0 | 5.0 | 5.0 | 5.1 | 5.1 | 5.1 | 5.2 | 5.2 | 5.3 | 5.3 | 5.4 | 5.4 | 5.5 | 5.5 | 5.5 | 5.6 | 5.6 | 5.7 | 5.7 | 5.8 | 5.8 | 5.9 | 5.9 | 6.0 | 6.0 | 6.0 | 6.1 | 6.1 | 6.2 | 6.2 | 6.2 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Intense | Intense | Intense | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 5.0 | Bright |
| 2 | 5.0 | Bright |
| 3 | 5.0 | Bright |
| 4 | 5.1 | Bright |
| 5 | 5.1 | Bright |
| 6 | 5.1 | Bright |
| 7 | 5.2 | Bright |
| 8 | 5.2 | Bright |
| 9 | 5.3 | Bright |
| 10 | 5.3 | Bright |
| 11 | 5.4 | Bright |
| 12 | 5.4 | Bright |
| 13 | 5.5 | Bright |
| 14 | 5.5 | Bright |
| 15 | 5.5 | Bright |
| 16 | 5.6 | Bright |
| 17 | 5.6 | Bright |
| 18 | 5.7 | Bright |
| 19 | 5.7 | Bright |
| 20 | 5.8 | Bright |
| 21 | 5.8 | Bright |
| 22 | 5.9 | Bright |
| 23 | 5.9 | Bright |
| 24 | 6.0 | Bright |
| 25 | 6.0 | Bright |
| 26 | 6.0 | Intense |
| 27 | 6.1 | Intense |
| 28 | 6.1 | Intense |
| 29 | 6.2 | Intense |
| 30 | 6.2 | Intense |
| 31 | 6.2 | Intense |
Is October a good time to visit San Isidro?
Our two travel scores rate October for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
October is a reasonable time to visit San Isidro for sightseeing.
What to pack for San Isidro in October
From October's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In October, San Isidro sees daytime highs around 20°C and nights near 14°C. Worth packing: rain gear and sun protection. About 10 days see rain.
Sea temperature near San Isidro in October
The nearest coast averages about 18°C in October — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 17 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 21 — 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 | 24 | 21 | 17 | 14 | 13 | 14 | 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 | 24 | Refreshing |
| Apr | 21 | Refreshing |
| May | 17 | Cool |
| Jun | 14 | Bracing |
| Jul | 13 | Bracing |
| Aug | 14 | Bracing |
| Sep | 15 | Cool |
| Oct | 18 | Cool |
| Nov | 21 | Refreshing |
| Dec | 23 | Refreshing |
UV index in San Isidro in October
Clear-sky midday UV in October peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in San Isidro peaks around January 15 at about 13 (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 11 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 13 | 11 | 10 | 6 | 4 | 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 | 4 | 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 Isidro in October
Average fine-particle pollution (PM2.5) through the year — so you can see where October falls, not just the annual average.
Air quality in San Isidro 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 Isidro?
San Isidro sits at 34.5°S, 58.5°W, 16 m above sea level, in Argentina. The nearest listed city is Tigre, 7.0 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 36 m around an average of 15 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 57 m; within 80 km, only modest variations in elevation — a maximum elevation change of 138 m.
The land around San Isidro is covered by artificial surfaces (50%) and trees (27%) within 3 km, artificial surfaces (33%) and water (31%) within 16 km, and grassland (24%), cropland (23%) and water (21%) 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 (-34.4697°, -58.5211°, elevation 16 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).