Puerto Manzanillo Weather in September
Puerto Manzanillo in September averages 29°C (84°F) during the day and 25°C (77°F) at night. September is part of the rainy season, so frequent rainfall is typical.
Rainfall in Puerto Manzanillo in September
As part of the rainy season, Puerto Manzanillo sees around 21 days of rain in September, with an average of 310 mm (12 in). With rain on many days and solid totals, showers are frequent and often moderately heavy. Waterproof gear is a sensible idea.
Temperature in Puerto Manzanillo in September
September in Puerto Manzanillo brings typical temperatures with highs around 29°C (84°F) and lows of 25°C (77°F). Overall, the month follows a fairly predictable daily temperature pattern. Nights are warm at 25°C (77°F). It's worth making sure your accommodation has decent ventilation or air conditioning.
Sunshine in Puerto Manzanillo in September
The area experiences a moderate amount of sunshine, with approximately 156 hours of sunlight expected. Even though this month is part of the rainy season, you could still see the sun every now and then.September in Puerto Manzanillo has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations 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 Puerto Manzanillo's climate page.
Puerto Manzanillo Temperature in September
Min Temperature
25°C (77°F)
Max Temperature
29°C (84°F)
Chance of Rain
71%
Precipitation
310 mm (12 in)
Rainy days
21 days
Humidity
85% *
Sunshine
156 hours *
Percentage Sunshine
*
Daily Historical Temperatures
41-year average (1977-2025)
Based on our historical records, temperatures in Puerto Manzanillo typically stay consistent throughout September, with daily highs averaging around 29°C (84°F). Nights are warm, with lows around 24°C (75°F).
Average temperatures in September
Daily Historical Precipitation
41-year average (1977-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Puerto Manzanillo in September
Browse day-by-day weather records for Puerto Manzanillo spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Puerto Manzanillo historical weather extremes in September
Our historical data for Puerto Manzanillo spans 2002 to 2025, revealing these weather extremes.
- The warmest day in September was on September 2, 2008, with a maximum of 35°C (95°F).
- The lowest daytime temperature in September was 26°C (79°F), recorded on September 6, 2005.
- Puerto Manzanillo registered its coldest September night on September 27, 2020, with temperatures dropping to 18°C (64°F).
- The heaviest September precipitation occurred on September 10, 2015, when 95 mm (3.7 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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What to Wear in Puerto Manzanillo in September
Warm but pleasant conditions in Puerto Manzanillo 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 Puerto Manzanillo 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 Puerto Manzanillo's climate page.
Temperature Rainfall Sunshine Humidity
See the full Puerto Manzanillo climate overview or explore weather in Costa Rica.
