Weather in San Juan in September
It's a rainy period, but great for indoor activities, museums, and lower prices.
Climate Overview
September is a wet time to visit San Juan. San Juan has a Tropical climate with average yearly highs of 31°C, lows of 25°C, and approximately 27 rainy days per month.
31°C
25°C
27days
12.3h
Is September a good time to visit San Juan?
It's a rainy period, but great for indoor activities, museums, and lower prices.
Daylight
6:13 AM
6:29 PM
Weather by Month
| Month | High | Low | Rainy days | Condition |
|---|---|---|---|---|
| January | 27°C | 22°C | 26 | Excellent (best) |
| February | 28°C | 22°C | 15 | Excellent (best) |
| March | 27°C | 22°C | 25 | Excellent (best) |
| April | 30°C | 23°C | 18 | Excellent (best) |
| May | 33°C | 24°C | 12 | Good |
| June | 32°C | 25°C | 19 | Wet |
| July | 32°C | 25°C | 25 | Wet |
| August | 31°C | 25°C | 16 | Wet |
| September | 31°C | 25°C | 27 | Wet |
| October | 30°C | 24°C | 26 | Wet |
| November | 29°C | 23°C | 22 | Wet |
| December | 28°C | 22°C | 16 | Excellent (best) |
Weather data: Open-Meteo Archive (2020-2025) • Open-Meteo.com (CC BY 4.0) • Historical avg. 2020–2025
What to Pack for September
Humidity-wicking clothes, insect repellent, waterproof bag, and rain poncho.
Planning a trip to San Juan?
Common Questions
Is September a good time to visit San Juan? +
September is typically Wet for visiting San Juan, with average highs of 31°C and around 27 rainy days.
What should I pack for San Juan in September? +
With highs of 31°C and lows of 25°C in {month}, we recommend: Humidity-wicking clothes, insect repellent, waterproof bag, and rain poncho.
Does it rain a lot in San Juan in September? +
San Juan typically sees around 27 rainy days in September.
How many hours of daylight are there in San Juan in September? +
In September, San Juan gets approximately 12.3 hours of daylight per day.
Is September peak season in San Juan? +
No, September is not peak season in San Juan. Expect better value on accommodation and fewer tourists.
What is the best month to visit San Juan? +
The best months to visit San Juan are December, January, February, March, April, when the weather is optimal for sightseeing.
More San Juan Guides
Best Time to Visit
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Things to Do
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Itineraries
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Overview
Complete travel guide for San Juan: top things to do, itineraries, and typical costs.