Esterillos Este Weather in September
September in Esterillos Este averages 28°C (82°F) during the day and 24°C (75°F) at night. September is part of the rainy season, with around 719 mm (28 in) of rainfall and frequent showers.
Rainfall in Esterillos Este in September
Esterillos Este is in the rainy season in September, with rain on around 22 days and an average of 719 mm (28 in). With high rainfall totals spread across the month, individual showers can be very heavy. Waterproof gear is strongly recommended.
Temperature in Esterillos Este in September
Daytime temperatures in Esterillos Este reach 28°C (82°F) in September, dropping to 24°C (75°F) at night. The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. Nights are warm at 24°C (75°F). It's worth making sure your accommodation has decent ventilation or air conditioning.
Sunshine in Esterillos Este in September
You can expect a moderate amount of sunlight, with approximately 153 hours. Even though this month is part of the wet season, you can still see the sun occasionally.September in Esterillos Este 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.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Costa Rica, check out our Esterillos Este's climate page.
Esterillos Este Temperature in September
Min Temperature
24°C (75°F)
Max Temperature
28°C (82°F)
Chance of Rain
73%
Precipitation
719 mm (28 in)
Rainy days
22 days
Humidity
83% *
Sunshine
153 hours *
Percentage Sunshine
*
Daily Historical Temperatures
44-year average (1976-2025)
Based on our historical records, temperatures in Esterillos Este 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 for Esterillos Este in September
Browse day-by-day weather records for Esterillos Este spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Esterillos Este historical weather extremes in September
Based on 29 years of weather observations (1996-2025), these are the most extreme conditions recorded in Esterillos Este.
- Esterillos Este recorded its highest September temperature of 33°C (91°F) on September 7, 2009.
- The coldest September day was on September 29, 2010, with a maximum of 21°C (70°F).
- The lowest overnight temperature recorded in September was 13°C (55°F) (September 29, 2010).
- The wettest September day on record brought 167 mm (6.6 in) of precipitation to Esterillos Este (September 27, 2019).
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
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tolerable
unpleasant
poor
What to Wear in Esterillos Este in September
Warm but pleasant conditions in Esterillos Este 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. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.What To Do in Esterillos Este 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 Costa Rica, check out our Esterillos Este's climate page.
Temperature Rainfall Sunshine Humidity
See the full Esterillos Este climate overview or explore weather in Costa Rica.
