San Juan Weather in October
October is one of the perfect months to visit San Juan, with daytime temperatures of 27°C (81°F) and lows of 12°C (54°F) at night. Some rainfall is typical for this time of year.
Rainfall in San Juan in October
Past climate data indicates that roughly 2 days will see rain, totalling around 32 mm (1.3 in) for the month. When rain does fall this month, it tends to come down hard. The low number of rain days makes each shower more significant.
Temperature in San Juan in October
The perfect temperature in San Juan in October makes it a solid month to visit, with 27°C (81°F) during the day and 12°C (54°F) at night. This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. With overnight lows of 12°C (54°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.
Sunshine in San Juan in October
There are approximately 305 hours of sunshine this month, resulting in mostly clear days.If your ideal day consists of dry skies and pleasant temperatures, March, April, May, June, July, August, September and October typically offer the best circumstances for San Juan.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Argentina, check out our San Juan's climate page.
San Juan Temperature in October
Min Temperature
12°C (54°F)
Max Temperature
27°C (81°F)
Chance of Rain
7%
Precipitation
32 mm (1.3 in)
Rainy days
2 days
Humidity
38%
Sunshine
305 hours
Percentage Sunshine
76%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in San Juan typically rise from around 25°C (77°F) at the start of October to approximately 29°C (84°F) by the end. Nights are cool, with lows typically ranging from 10°C (50°F) to 15°C (59°F).
Average temperatures in October
Historical weather for San Juan in October
Browse day-by-day weather records for San Juan spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
San Juan historical weather extremes in October
The extremes listed below come from historical weather data collected in San Juan from 1976 through 2025.
- The warmest day in October was on October 29, 2009, with a maximum of 41°C (106°F).
- The coldest night in October in San Juan was on October 6, 1981, with a minimum of 0°C (32°F).
Best Places in Argentina in October
Find out more about the weather in Argentina and which places have the best travel conditions in this month. See all of Argentina in October →
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What to Wear in San Juan in October
Warm temperatures in October make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Pack a light rain jacket or compact umbrella for occasional showers. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in San Juan in October
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Argentina, check out our San Juan's climate page.
Temperature Rainfall Sunshine Humidity
See the full San Juan climate overview or explore weather in Argentina.
