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Naguabo Weather in September
September in Naguabo brings very high temperatures around 30°C (86°F) during the day, dropping to 26°C (79°F) at night, with the most rainfall of the year.
Rainfall in Naguabo in September
With the year's heaviest rain occurring this month, it's best to be equipped with a poncho to handle the frequent downpours. Typically, you can expect about 18 days of rain this month, with 192 mm (7.6 in) on average. Expect frequent rainfall this month, and not just light drizzle. When it rains, it tends to come down hard.
Temperature in Naguabo in September
Naguabo in September gets highs of 30°C (86°F) during the day and drops to 26°C (79°F) at night. If you're spending a lot of time outdoors, it helps to plan around the warmer part of the day. Nights are warm at 26°C (79°F). It's worth making sure your accommodation has decent ventilation or air conditioning. On average, it is the warmest month of the year.
Sunshine in Naguabo in September
The city usually sees around 236 hours of sunlight, indicating many sunny days , a great month for sightseeing.If you're looking for dry conditions and comfortable temperatures, September may not be the ideal month to visit Naguabo. Our weather planner can help you explore destinations with more pleasant weather conditions.
Naguabo Temperature in September
Min Temperature
26°C (79°F)
Max Temperature
30°C (86°F)
Chance of Rain
61%
Precipitation
192 mm (7.6 in)
Rainy days
18 days
Humidity
76% *
Sunshine
236 hours *
Percentage Sunshine
64% *
* Data from: San Juan, Puerto Rico (37 KM, 23 Miles).
Naguabo Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Naguabo - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Naguabo typically stay consistent throughout September, with daily highs averaging around 30°C (86°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 Naguabo in September
Browse day-by-day weather records for Naguabo spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Naguabo historical weather extremes in September
Based on 49 years of weather observations in Naguabo between 1976 and 2025, these are the recorded extremes.
- On September 9, 2002, temperatures climbed to 34°C (93°F), marking the warmest September day on record.
- On September 26, 1997, Naguabo saw its coldest September day with temperatures maxing out at 25°C (77°F).
- The coldest night in September in Naguabo 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 Naguabo in September
Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Also bring a poncho, it will rain a lot! Waterproof everything you can. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.
What To Do in Naguabo 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 -
Camping7/10 -
Outdoor sports7/10
Naguabo 3-Day Forecast
More climate data for Naguabo
Temperature Rainfall Sunshine Humidity
See the full Naguabo 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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