Manuel Antonio National Park Weather in September
September in Manuel Antonio National Park brings high temperatures, with daytime highs of 28°C (82°F) and nights around 23°C (73°F). It's part of the rainy season, with 835 mm (33 in) of rainfall on average, so an umbrella or poncho is a good idea.
Rainfall in Manuel Antonio National Park in September
Manuel Antonio National Park is in the rainy season in September, with rain on around 22 days and an average of 835 mm (33 in). The rain this month falls heavily when it arrives, so waterproofs are worth keeping handy.
Temperature in Manuel Antonio National Park in September
Manuel Antonio National Park in September gets highs of 28°C (82°F) during the day and drops to 23°C (73°F) at night. This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. With lows around 23°C (73°F), the nights are warm enough that a sheet is usually all you need for bedding.
Sunshine in Manuel Antonio National Park in September
The area enjoys a moderate level of sunlight, with around 153 hours. It's a good balance between sunny and rainy days.Our weather planner can help you find worldwide destinations with pleasant weather during this period. February and March typically offer the best weather for Manuel Antonio National Park .
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 Manuel Antonio National Park 's climate page.
Manuel Antonio National Park Temperature in September
Min Temperature
23°C (73°F)
Max Temperature
28°C (82°F)
Chance of Rain
73%
Precipitation
835 mm (33 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 Manuel Antonio National Park 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 Manuel Antonio National Park in September
Browse day-by-day weather records for Manuel Antonio National Park spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Manuel Antonio National Park historical weather extremes in September
Our historical data for Manuel Antonio National Park spans 1996 to 2025, revealing these weather extremes.
- On September 7, 2009, temperatures climbed to 33°C (91°F), marking the warmest September day on record.
- Manuel Antonio National Park experienced its chilliest September day on September 29, 2010, reaching only 21°C (70°F).
- The coldest night in September in Manuel Antonio National Park was on September 29, 2010, with a minimum of 13°C (55°F).
- Peak precipitation in September occurred on September 27, 2019, when 166 mm (6.5 in) of precipitation was measured.
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 →
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What to Wear in Manuel Antonio National Park in September
Warm but pleasant conditions in Manuel Antonio National Park 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. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Manuel Antonio National Park 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 Manuel Antonio National Park 's climate page.
Temperature Rainfall Sunshine Humidity
See the full Manuel Antonio National Park climate overview or explore weather in Costa Rica.
