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Playa Hermosa Weather in September
September in Playa Hermosa brings high temperatures, with daytime highs of 28°C (82°F) and nights around 24°C (75°F). It's part of the rainy season, with 611 mm (24 in) of rainfall on average, so an umbrella or poncho is a good idea.
Rainfall in Playa Hermosa in September
Playa Hermosa is in the rainy season in September, with rain on around 22 days and an average of 611 mm (24 in). Rain during the rainy season here tends to be intense rather than just persistent drizzle. Expect significant downpours, often in the late afternoon.
Temperature in Playa Hermosa in September
Daytime temperatures in Playa Hermosa reach 28°C (82°F) in September, dropping to 24°C (75°F) at night. This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. With overnight lows of 24°C (75°F), evenings and nights remain warm. Light clothing and an open window or fan can help you sleep comfortably.
Sunshine in Playa Hermosa in September
You can expect a moderate amount of sunlight, with approximately 147 hours. Even though this month is part of the wet season, you can still see the sun occasionally.September in Playa Hermosa 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.
Playa Hermosa Temperature in September
Min Temperature
24°C (75°F)
Max Temperature
28°C (82°F)
Chance of Rain
74%
Precipitation
611 mm (24 in)
Rainy days
22 days
Humidity
86% *
Sunshine
147 hours *
Percentage Sunshine
*
* Data from: Santamaria, Costa Rica (49 KM, 30 Miles).
Playa Hermosa Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Playa Hermosa - and find the best time to visit.
Daily Historical Temperatures
44-year average (1976-2025)
Based on our historical records, temperatures in Playa Hermosa typically stay consistent throughout September, with daily highs averaging around 28°C (82°F). Nights are pleasant, with lows around 19°C (66°F).
Average temperatures in September
Daily Historical Precipitation
44-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 Playa Hermosa in September
Browse day-by-day weather records for Playa Hermosa spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Playa Hermosa historical weather extremes in September
Based on 30 years of weather observations in Playa Hermosa between 1996 and 2026, these are the recorded extremes.
- On September 7, 2009, temperatures climbed to 33°C (91°F), marking the warmest September day on record.
- The lowest daytime temperature in September was 21°C (70°F), recorded on September 29, 2010.
- The lowest overnight temperature recorded in September was 13°C (55°F) (September 29, 2010).
- The wettest day in September Playa Hermosa was on September 27, 2019 with 167 mm (6.6 in) of precipitation.
Best Places in Costa Rica in September
Find out more about the weather in Costa Rica and which places have the best travel conditions in this month. See all of Costa Rica 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 Playa Hermosa 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. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.
Playa Hermosa 3-Day Forecast
More climate data for Playa Hermosa
Temperature Rainfall Sunshine Humidity
See the full Playa Hermosa climate overview or explore weather in Costa Rica.
Popular in September
Where to go in September - average daytime high across popular destinations.
Tamarindo
30°C (86°F) Cahuita29°C (84°F) Santa Teresa29°C (84°F) Herradura28°C (82°F) Puerto Viejo de Talamanca29°C (84°F) Fortuna29°C (84°F) Jacó28°C (82°F) San José24°C (75°F) Bucket list
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