Maunabo Weather in September
September in Maunabo brings high temperatures, with highs of 30°C (86°F) and nights dropping to 26°C (79°F). It's the rainiest month of the year, so come prepared with waterproof gear.
Rainfall in Maunabo in September
This month is known for its intense rain, often falling heavily. Having a poncho will help you stay dry during the showers. Analyzing past climate data, one can expect approximately 18 days of rain, averaging 192 mm (7.6 in). This month brings frequent, heavy showers. Both the number of wet days and the rainfall totals are on the high side.
Temperature in Maunabo in September
September in Maunabo brings high temperatures, with highs of 30°C (86°F) and nights around 26°C (79°F). This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. Nights are warm at 26°C (79°F). It's worth making sure your accommodation has decent ventilation or air conditioning.
Sunshine in Maunabo in September
With approximately 236 hours of sunshine, the days are filled with clear skies. It makes it a perfect month for being outside.If you prefer dry days with pleasant temperatures, September may not be the ideal month to visit Maunabo. Our weather planner can help you explore destinations with more pleasant weather conditions.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Puerto Rico, check out our Maunabo's climate page.
Maunabo Temperature in September
Min Temperature
26°C (79°F)
Max Temperature
30°C (86°F)
Chance of Rain
59%
Precipitation
192 mm (7.6 in)
Rainy days
18 days
Humidity
76% *
Sunshine
236 hours *
Percentage Sunshine
64% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Maunabo typically stay consistent throughout September, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 26°C (79°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 for Maunabo in September
Browse day-by-day weather records for Maunabo spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Maunabo historical weather extremes in September
Based on weather observations in Maunabo between 1976 and 2025, these are the recorded extremes during September.
- The warmest day in September was on September 29, 2013, with a maximum of 34°C (93°F).
- The coldest September day was on September 22, 2008, with a maximum of 25°C (77°F).
- Maunabo registered its coldest September night on September 28, 1981, with temperatures dropping to 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
What to Wear in Maunabo 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. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Maunabo in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Puerto Rico, check out our Maunabo's climate page.
Temperature Rainfall Sunshine Humidity
See the full Maunabo climate overview or explore weather in Puerto Rico.
