Potrero Weather in September
With daytime temperatures of 30°C (86°F) and nighttime lows of 25°C (77°F), September in Potrero brings high temperatures during the day. Do keep in mind that September is part of the rainy season, with frequent and often heavy rainfall.
Rainfall in Potrero in September
As part of the rainy season, Potrero sees around 23 days of rain in September, with an average of 285 mm (11 in). Rainy season showers tend to be fairly substantial. A good rain jacket or umbrella is worth having with you most days.
Temperature in Potrero in September
In September, Potrero sees high temperatures, with highs of 30°C (86°F). Nights drop to around 25°C (77°F). Overall, the month follows a fairly predictable daily temperature pattern. At 25°C (77°F) overnight, it stays warm after dark. Light, breathable clothing and good airflow in your room make a noticeable difference.
Sunshine in Potrero in September
With about 158 hours of sunshine, the area enjoys a nice balance of sun and rainy moments, creating a pleasant environment.September in Potrero 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 Potrero's climate page.
Potrero Temperature in September
Min Temperature
25°C (77°F)
Max Temperature
30°C (86°F)
Chance of Rain
78%
Precipitation
285 mm (11 in)
Rainy days
23 days
Humidity
86% *
Sunshine
158 hours *
Percentage Sunshine
*
Daily Historical Temperatures
41-year average (1977-2025)
Based on our historical records, temperatures in Potrero typically stay consistent throughout September, with daily highs averaging around 30°C (86°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 Potrero in September
Browse day-by-day weather records for Potrero spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Potrero historical weather extremes in September
According to our 26 years of weather records for Potrero, the following extremes were recorded between 1999 and 2025.
- The warmest day in September was on September 7, 2009, with a maximum of 35°C (95°F).
- The coldest September day was on September 22, 2005, with a maximum of 25°C (77°F).
- The lowest overnight temperature recorded in September was 20°C (68°F) (September 25, 2006).
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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tolerable
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What to Wear in Potrero in September
Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Potrero 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 Potrero's climate page.
Temperature Rainfall Sunshine Humidity
See the full Potrero climate overview or explore weather in Costa Rica.
