Nosara Weather in September
With daytime temperatures of 29°C (84°F) and nighttime lows of 24°C (75°F), September in Nosara 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 Nosara in September
As part of the rainy season, Nosara sees around 23 days of rain in September, with an average of 433 mm (17 in). Showers during the rainy season tend to be heavy and can come down intensely. An umbrella is often not enough, so a poncho or waterproof jacket is a better choice.
Temperature in Nosara in September
In September, Nosara sees high temperatures, with highs of 29°C (84°F). Nights drop to around 24°C (75°F). This kind of day-to-night contrast is typical for this time of year. At 24°C (75°F) overnight, it stays warm after dark. Light, breathable clothing and good airflow in your room make a noticeable difference.If you prefer dry days with pleasant temperatures, September may not be the ideal month to visit Nosara. Our weather planner can help you explore destinations with more pleasant weather conditions.
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 Nosara's climate page.
Nosara Temperature in September
Min Temperature
24°C (75°F)
Max Temperature
29°C (84°F)
Chance of Rain
76%
Precipitation
433 mm (17 in)
Rainy days
23 days
Daily Historical Temperatures
41-year average (1977-2025)
Based on our historical records, temperatures in Nosara typically stay consistent throughout September, with daily highs averaging around 29°C (84°F). Nights are warm, with lows around 23°C (73°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 Nosara in September
Browse day-by-day weather records for Nosara spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Nosara historical weather extremes in September
Based on weather observations in Nosara between 1999 and 2025, these are the recorded extremes during September.
- The warmest day in September was on September 23, 2023, with a maximum of 35°C (95°F).
- On September 26, 2010, Nosara saw its coldest September day with temperatures maxing out at 25°C (77°F).
- The lowest overnight temperature recorded in September was 20°C (68°F) (September 25, 2006).
- The heaviest September precipitation occurred on September 7, 2021, when 208 mm (8.2 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 Nosara 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.What To Do in Nosara 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 Nosara's climate page.
See the full Nosara climate overview or explore weather in Costa Rica.
