San José in September
The weather in September
In September, San José averages daytime highs of 24° and night-time lows of 18° — warm weather by day. Expect around 386 mm of precipitation spread over about 29 wet days, with average cloud cover near 66%.
Temperatures are much the same as in August, and October brings little change.
September scores 52/100 — fair conditions for sightseeing — and ranks 7th of the twelve months for San José. For the most comfortable weather, consider January, February and December instead.
Around the middle of the month the sun rises at 05:27 and sets at 17:38 local time, giving 12 h 11 min of daylight. Days shorten by 15 minutes over the month.
Why 52/100?
How the score for September is builtComfort peaks for daytime highs between 18° and 25°C (64–77°F).
Around San José this month
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Costa Rica's best in September
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San José in September: quick answers
Is September a good time to visit San José?
September scores 52/100 for San José, which we rate as fair. Average highs are 24°C with 29 wet days.
How warm is San José in September?
Daytime highs average 24°C and night-time lows 18°C in September.
Does it rain a lot in San José in September?
San José receives about 386 mm of precipitation in September, falling on around 29 days.