Rincon Weather in September
Thinking of visiting Rincon in September? Expect very high temperatures reaching 30°C (86°F) during the day, dropping to 27°C (81°F) at night, and be prepared for the wettest month of the year.
Rainfall in Rincon in September
With this being the wettest month, keeping an umbrella on hand might save you from getting wet from a sudden shower. Typically, you can expect about 17 days of rain this month, with 111 mm (4.4 in) on average. This month brings frequent, heavy showers. Both the number of wet days and the rainfall totals are on the high side.
Temperature in Rincon in September
Expect highs of 30°C (86°F) in Rincon in September, with nights dropping to around 27°C (81°F). If you're spending a lot of time outdoors, it helps to plan around the warmer part of the day. With overnight lows of 27°C (81°F), nights stay very warm. Air conditioning makes a real difference if you're sensitive to heat. A cold shower before bed can also help you get to sleep more comfortably.September in Rincon has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.
Rincon Temperature in September
Min Temperature
Max Temperature
Chance of Rain
Precipitation
Rainy days
Rincon Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Rincon - and find the best time to visit.
Daily Historical Temperatures
47-year average (1977-2025)
Based on our historical records, temperatures in Rincon typically stay consistent throughout September, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 24°C (75°F).
Average temperatures in September
Historical weather records for Rincon in September
Browse day-by-day weather records for Rincon spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Rincon historical weather extremes in September
Our historical data for Rincon spans 1999 to 2025, revealing these weather extremes.
- The hottest September day on record in Rincon reached 37°C (99°F) (September 26, 2012).
- On September 18, 2004, Rincon saw its coldest September day with temperatures maxing out at 26°C (79°F).
- Nighttime temperatures dropped to 21°C (70°F) on September 30, 2014, marking the coldest September night on record.
Best Places in Puerto Rico in September
Find out more about the weather in Puerto Rico and which places have the best travel conditions in this month. See all of Puerto Rico in September →
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Rincon in September
Warm but pleasant conditions in Rincon in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Expect heavy rainfall, so bring good rain protection and waterproof bags.
What To Do in Rincon in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
-
Cycling7/10 -
Walking7/10 -
Camping7/10 -
Outdoor sports7/10
Rincon 3-Day Forecast
See the full Rincon climate overview or explore weather in Puerto Rico.
Popular in September
Where to go in September - average daytime high across popular destinations.
San Juan
31°C (88°F) Fajardo30°C (86°F) Luquillo30°C (86°F) Aguada
30°C (86°F) Rincon
30°C (86°F) Rio Grande31°C (88°F) Culebra30°C (86°F) Vieques30°C (86°F) 
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
The 5 most beautiful lakes in Canada
Explore Canada's stunning lakes: Lake Louise, Lake Superior, Maligne Lake, Emerald Lake, and Lake Okanagan, each offering unique beauty and activities.
Yosemite National Park is definitely worth a visit
Vast forests, blue lakes, towering sequoias, and majestic waterfalls hint at the beauty of Yosemite National Park—a true natural masterpiece.
The 10 most alternative cities in the United States
Discover the top 10 fun and alternative U.S. cities rich in art, culture, and adventure. From Portland's hippy charm to Sedona's stunning landscapes.
Lake Atitlan: the most beautiful lake in the world
At Lake Atitlan you will be enchanted by beautiful volcanoes, amazing sunsets and the serene tranquility. Mix this with the vibrant Mayan community and you'll understand why Atitlan has something magical.