Carrillo Weather in September
Carrillo in September sees high temperatures, with highs around 29°C (84°F) and overnight lows of 24°C (75°F). With the rainy season in full effect, expect around 429 mm (17 in) of rainfall and regular showers throughout the month.
Rainfall in Carrillo in September
Carrillo is in the rainy season in September, with rain on around 23 days and an average of 429 mm (17 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 Carrillo in September
Daytime temperatures in Carrillo reach 29°C (84°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 Carrillo in September
The city usually sees around 159 hours of sunlight, indicating a moderately sunny period (despite it being part of rainy season).Our weather planner can help you find worldwide destinations with pleasant weather during this period. January, February and March typically offer the best weather for Carrillo.
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 Carrillo's climate page.
Carrillo Temperature in September
Min Temperature
24°C (75°F)
Max Temperature
29°C (84°F)
Chance of Rain
76%
Precipitation
429 mm (17 in)
Rainy days
23 days
Sunshine
159 hours *
Percentage Sunshine
*
Historical weather for Carrillo in September
Browse day-by-day weather records for Carrillo spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Carrillo historical weather extremes in September
Based on 19 years of weather observations (2006-2025), these are the most extreme conditions recorded in Carrillo.
- On September 20, 2015, temperatures climbed to 30°C (86°F), marking the warmest September day on record.
- On September 24, 2010, Carrillo saw its coldest September day with temperatures maxing out at 25°C (77°F).
- The lowest overnight temperature recorded in September was 23°C (73°F) (September 21, 2006).
- The heaviest September precipitation occurred on September 14, 2019, when 84 mm (3.3 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
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tolerable
unpleasant
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What to Wear in Carrillo in September
Warm but pleasant conditions in Carrillo 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 Carrillo 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 Carrillo's climate page.
See the full Carrillo climate overview or explore weather in Costa Rica.
