Jacó Weather in September
September in Jacó typically sees daytime highs of 28°C (82°F) and nighttime lows of 24°C (75°F). September falls within the rainy season, so heavy rainfall is to be expected.
Rainfall in Jacó in September
Jacó is in the rainy season in September, with rain on around 22 days and an average of 579 mm (23 in). With high rainfall totals spread across the month, individual showers can be very heavy. Waterproof gear is strongly recommended.
Temperature in Jacó in September
Expect highs of 28°C (82°F) in Jacó in September, with nights dropping to around 24°C (75°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. 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 Jacó in September
The month experiences a moderate amount of sunlight, with 159 hours of sunshine. This provides a nice balance between sunshine and rain.Our weather planner can help you find worldwide destinations with pleasant weather during this period. January and February typically offer the best weather for Jacó.
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 Jacó's climate page.
Jacó Temperature in September
Min Temperature
24°C (75°F)
Max Temperature
28°C (82°F)
Chance of Rain
74%
Precipitation
579 mm (23 in)
Rainy days
22 days
Sunshine
159 hours *
Percentage Sunshine
*
Daily Historical Temperatures
44-year average (1976-2025)
Based on our historical records, temperatures in Jacó 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 Jacó in September
Browse day-by-day weather records for Jacó spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Jacó historical weather extremes in September
Based on weather observations in Jacó between 1996 and 2025, these are the recorded extremes during September.
- Jacó recorded its highest September temperature of 33°C (91°F) on September 7, 2009.
- The lowest daytime temperature in September was 21°C (70°F), recorded on September 29, 2010.
- Nighttime temperatures dropped to 13°C (55°F) on September 29, 2010, marking the coldest September night on record.
- The heaviest September precipitation occurred on September 27, 2019, when 167 mm (6.6 in) of precipitation fell.
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
What to Wear in Jacó 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. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Jacó 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 Jacó's climate page.
See the full Jacó climate overview or explore weather in Costa Rica.
