San Juan in September
Peak hurricane risk
By Daan · Last reviewed October 2026
The short answer
September is a reasonable month in San Juan — with trade-offs.
September is the peak of hurricane season; Hurricane Maria hit in September 2017. It is cheap and quiet if you can be flexible.
September in detail
What September actually feels like
- Weather
- 25–32°C
- Hot, humid and often wet.
- Crowds
- Low
- Quiet.
- Prices
- $
- Low-season rates.
+The cheapest rates.
–Peak storm season.
My tip for September
Only book refundable rates this month.
- Budget
- Quiet
How September compares
Against the other eleven months
7th of 12 overall in San Juan, 12th for weather, 1st for space, 1st for value. It is the emptiest month of the year; and it's also the best value.
See all twelve months for San JuanNot set on September?
Even stronger months in San Juan
Also good in September
Weather
Weather in San Juan in September
In September San Juan averages a high of 32°C (90°F) and a low of 25°C (77°F), with about 165 mm of rain or snow over 16 wet days. The warmest month is June (around 32°C) and the coolest is January (around 28°C); the wettest month is November.
- Average high
- 32°C
- 90°F
- Average low
- 25°C
- 77°F
- Precipitation
- 165 mm
- Wet days
- 16
Climate data: NOAA (Luis Muñoz Marín International Airport, 1991–2020). Temperatures are averages of daily highs and lows.
Quick answers
San Juan in September: the questions people ask
- Is September a good time to visit San Juan?
- September is a reasonable month in San Juan — with trade-offs. It ranks 7 of 12 months in San Juan overall (12 for weather, 1 for space, 1 for value). The main upside: The cheapest rates. The main downside: Peak storm season.
- What is the weather like in San Juan in September?
- Average highs are around 32°C and lows around 25°C. Expect about 165 mm of rain or snow over roughly 16 wet days. Hot, humid and often wet. For comparison, the warmest month is June (around 32°C) and the coolest is January (around 28°C).
- Is San Juan crowded in September?
- Crowds are low. Quiet. September is the quietest month of the year.
- How expensive is San Juan in September?
- Prices are at level 1 of 5 ($). Low-season rates. September is also the best-value month.
- When is the best time to visit San Juan?
- In the CrowdFreeViews month scores, April is the best month overall (September ranks 7 of 12). The quietest month is September and the best value is September.