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Hatillo Weather in September
In Hatillo, September brings very high daytime temperatures around 31°C (88°F), with nights cooling to 25°C (77°F). It is the wettest month of the year, so expect more rainfall than usual.
Rainfall in Hatillo in September
It records the year's peak rainfall, often coming down quite heavily. We recommend bringing a poncho, which will keep you dry. Expect around 17 days of rain based on historical data, with 167 mm (6.6 in) average. Rain falls regularly this month and can be quite heavy when it does. Showers can be substantial, so waterproof gear is a good idea.
Temperature in Hatillo in September
Daytime highs in Hatillo in September reach 31°C (88°F), with nights around 25°C (77°F). For most visitors, the main thing to prepare for is the heat during the day. Nights are warm at 25°C (77°F). It's worth making sure your accommodation has decent ventilation or air conditioning.September in Hatillo has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options in the world.
Hatillo Temperature in September
Min Temperature
25°C (77°F)
Max Temperature
31°C (88°F)
Chance of Rain
58%
Precipitation
167 mm (6.6 in)
Rainy days
17 days
Hatillo Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Hatillo - and find the best time to visit.
Daily Historical Temperatures
48-year average (1977-2025)
Based on our historical records, temperatures in Hatillo typically stay consistent throughout September, with daily highs averaging around 31°C (88°F). Nights are warm, with lows around 24°C (75°F).
Average temperatures in September
Historical weather records for Hatillo in September
Browse day-by-day weather records for Hatillo spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Hatillo historical weather extremes in September
Based on 26 years of weather observations in Hatillo between 1999 and 2025, these are the recorded extremes.
- The warmest day in September was on September 3, 2010, with a maximum of 35°C (95°F).
- The lowest daytime temperature in September was 26°C (79°F), recorded on September 18, 2022.
- The coldest night in September in Hatillo was on September 3, 2024, 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 Hatillo 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.
What To Do in Hatillo in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling7/10 -
Walking7/10 -
Camping6/10 -
Outdoor sports7/10
Hatillo 3-Day Forecast
More climate data for Hatillo
See the full Hatillo 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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