St. John the Baptist Cathedral, San JuanReport this photo · linked, not stored
San Juan in September
The weather in September
In September, San Juan averages daytime highs of 23° and night-time lows of 7° — mild weather by day. Expect around 8 mm of precipitation spread over about 1 wet day, with average cloud cover near 20%.
Days are 2.5° warmer than in August on average, and October is warmer again by about 3.9°.
September scores 98/100 — excellent conditions for sightseeing — and ranks 1st of the twelve months for San Juan.
Around the middle of the month the sun rises at 07:34 and sets at 19:27 local time, giving 11 h 53 min of daylight. Days lengthen by 55 minutes over the month.
Why 98/100?
How the score for September is builtComfort peaks for daytime highs between 18° and 25°C (64–77°F).
Around San Juan this month
Rawson
Argentina's best in September
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Godoy Cruz
San Juan in September: quick answers
Is September a good time to visit San Juan?
September scores 98/100 for San Juan, which we rate as excellent. Average highs are 23°C with 1 wet days.
How warm is San Juan in September?
Daytime highs average 23°C and night-time lows 7°C in September.
Does it rain a lot in San Juan in September?
San Juan receives about 8 mm of precipitation in September, falling on around 1 days.