Luquillo Weather in September
September in Luquillo brings very high temperatures, with daytime highs of 30°C (86°F) and nights around 26°C (79°F). It's also the wettest month of the year, so an umbrella is a must.
Rainfall in Luquillo in September
The month is marked by heavy rainfall, often coming down in intense bursts. Make sure to have a poncho to stay dry. Looking at the last 30 years, the data shows about 18 days with rain, averaging 166 mm (6.5 in) for the month. Wet weather is a regular and significant part of this month. Frequent days of rain combined with high totals means proper waterproofs are worth packing.
Temperature in Luquillo in September
If you're visiting Luquillo in September, expect highs of 30°C (86°F) and overnight lows around 26°C (79°F). If you're spending a lot of time outdoors, it helps to plan around the warmer part of the day. With lows around 26°C (79°F), the nights are warm enough that a sheet is usually all you need for bedding.While these temperatures are typical, some days might be even hotter. Always be prepared for the unexpected spikes in warmth. Dressing in lightweight and breathable outfits will help you stay cool. Don't forget to stay hydrated and wear sun protection to handle the heat better.
Sunshine in Luquillo in September
The city usually sees around 236 hours of sunlight, indicating many sunny days — a great month for sightseeing.September in Luquillo 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.
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 Luquillo's climate page.
Luquillo Temperature in September
Min Temperature
26°C (79°F)
Max Temperature
30°C (86°F)
Chance of Rain
61%
Precipitation
166 mm (6.5 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 Luquillo 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 for Luquillo in September
Browse day-by-day weather records for Luquillo spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Luquillo historical weather extremes in September
Based on 49 years of weather observations (1976-2025), these are the most extreme conditions recorded in Luquillo.
- The hottest September day on record in Luquillo reached 34°C (93°F) (September 24, 2017).
- Luquillo experienced its chilliest September day on September 26, 1997, reaching only 25°C (77°F).
- The lowest overnight temperature recorded in September was 21°C (70°F) (September 28, 1981).
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
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tolerable
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What to Wear in Luquillo in September
Warm but pleasant conditions in Luquillo 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. It's going to pour! Pack a good poncho and prepare for very wet conditions. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Luquillo 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 Luquillo's climate page.
Temperature Rainfall Sunshine Humidity
See the full Luquillo climate overview or explore weather in Puerto Rico.
