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Barranquitas Weather in September
September in Barranquitas brings very high temperatures, with daytime highs of 31°C (88°F) and nights around 24°C (75°F). It's also the wettest month of the year, so an umbrella is a must.
Rainfall in Barranquitas in September
The month is marked by heavy rainfall, often coming down in intense bursts. Make sure to have a poncho to stay dry. Typically, about 18 days will experience rainfall, with an average of 163 mm (6.4 in) for the month. This month brings frequent, heavy showers. Both the number of wet days and the rainfall totals are on the high side.
Temperature in Barranquitas in September
In September, expect very high temperatures in Barranquitas, with highs of 31°C (88°F) and lows of 24°C (75°F) at night. For most visitors, the main thing to prepare for is the heat during the day. At 24°C (75°F) overnight, it stays warm after dark. Light, breathable clothing and good airflow in your room make a noticeable difference.
Sunshine in Barranquitas in September
The city usually sees around 236 hours of sunlight, indicating many sunny days , a great month for sightseeing.September in Barranquitas 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.
Barranquitas Temperature in September
Min Temperature
24°C (75°F)
Max Temperature
31°C (88°F)
Chance of Rain
61%
Precipitation
163 mm (6.4 in)
Rainy days
18 days
Humidity
76% *
Sunshine
236 hours *
Percentage Sunshine
64% *
* Data from: San Juan, Puerto Rico (42 KM, 26 Miles).
Barranquitas Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Barranquitas - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Barranquitas typically stay consistent throughout September, with daily highs averaging around 31°C (88°F). Nights are warm, with lows around 25°C (77°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather records for Barranquitas in September
Browse day-by-day weather records for Barranquitas spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Barranquitas historical weather extremes in September
According to our 49 years of weather records for Barranquitas, the following extremes were recorded between 1976 and 2025.
- The hottest September day on record in Barranquitas reached 35°C (95°F) (September 29, 2011).
- Barranquitas experienced its chilliest September day on September 22, 2008, reaching only 25°C (77°F).
- The coldest night in September in Barranquitas was on September 28, 1981, with a minimum of 21°C (70°F).
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
pleasant
tolerable
unpleasant
poor
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 Barranquitas in September
Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.
What To Do in Barranquitas in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming8/10 -
Cycling7/10 -
Walking7/10 -
Camping6/10 -
Outdoor sports7/10
Barranquitas 3-Day Forecast
More climate data for Barranquitas
Temperature Rainfall Sunshine Humidity
See the full Barranquitas 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
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