Discover the San Blas Islands
The San Blas Islands are among the most beautiful islands in the Caribbean and perhaps even in the world. These tropical pearls are located in the north of Panama.
Isla Grande Weather in September
Isla Grande in September averages 29°C (84°F) during the day and 25°C (77°F) at night. September is part of the rainy season, so frequent rainfall is typical.
Rainfall in Isla Grande in September
As part of the rainy season, Isla Grande sees around 19 days of rain in September, with an average of 274 mm (11 in). Rainfall this month is frequent and tends to be fairly heavy when it does fall. Packing waterproofs is a good idea.
Temperature in Isla Grande in September
Temperatures in Isla Grande in September top out at 29°C (84°F) and drop to 25°C (77°F) overnight. Overall, the month follows a fairly predictable daily temperature pattern. At 25°C (77°F) overnight, it stays warm after dark. Light, breathable clothing and good airflow in your room make a noticeable difference.
Sunshine in Isla Grande in September
The area experiences a moderate amount of sunshine, with approximately 117 hours of sunlight expected. Even though this month is part of the rainy season, you could still see the sun every now and then.September in Isla Grande 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.
Isla Grande Temperature in September
Min Temperature
25°C (77°F)
Max Temperature
29°C (84°F)
Chance of Rain
64%
Precipitation
274 mm (11 in)
Rainy days
19 days
Humidity
81% *
Sunshine
117 hours *
Percentage Sunshine
*
* Data from: Tocumen, Panama (68 KM, 42 Miles).
Isla Grande Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Isla Grande - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Isla Grande typically stay consistent throughout September, with daily highs averaging around 29°C (84°F). Nights are warm, with lows around 24°C (75°F).
Average temperatures in September
Historical weather records for Isla Grande in September
Browse day-by-day weather records for Isla Grande spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Isla Grande historical weather extremes in September
The extremes listed below come from historical weather data collected in Isla Grande from 1976 through 2026.
- The warmest day in September was on September 23, 2004, with a maximum of 34°C (93°F).
- Isla Grande experienced its chilliest September day on September 23, 2003, reaching only 24°C (75°F).
- The coldest night in September in Isla Grande was on September 10, 2019, with a minimum of 20°C (68°F).
Best Places in Panama in September
Find out more about the weather in Panama and which places have the best travel conditions in this month. See all of Panama 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 Isla Grande 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! Sunglasses could come in handy during the sunnier parts of your trip.
What To Do in Isla Grande in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming7/10 -
Cycling7/10 -
Walking7/10 -
Camping6/10 -
Outdoor sports7/10
Isla Grande 3-Day Forecast
More climate data for Isla Grande
Temperature Rainfall Sunshine Humidity
See the full Isla Grande climate overview or explore weather in Panama.
Popular in September
Where to go in September - average daytime high across popular destinations.
Pedasí
30°C (86°F) Santa Catalina29°C (84°F) Playa Blanca30°C (86°F) Bastimentos30°C (86°F) Panama City30°C (86°F) Bocas del Toro30°C (86°F) Contadora29°C (84°F) Boquete26°C (79°F) Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
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