La Fortuna weather in September 2025

Expect 29°C daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in La Fortuna in September. Check more long-term weather averages for La Fortuna in September before you book your next holiday to Costa Rica in 2025/2026.

  • 29°C maximum daytime temperature in September in La Fortuna29
    29°C max day temperature
  • 5 hours of sunshine per day
  • 23 days with some rainfall in September in La Fortuna23
    23 days with some rainfall
  • 22°C minimum night-time temperature in September in La Fortuna22
    22°C min night temperature
  • 12 hours of daylight per day in September in La Fortuna12
    12 hours of daylight per day
  • High heat & humidity in September in La FortunaH
    High heat & humidity
  • 413 mm monthly rainfall in September in La Fortuna413
    413 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in La Fortuna11
    11+ (Extreme) UV index

More about La Fortuna

La Fortuna by month

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The September weather guide for Costa Rica (La Fortuna) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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How hot is it in La Fortuna in September?

Daytime temperatures usually reach 29°C in La Fortuna in September with high heat and humidity, falling to 22°C at night.

How sunny is it in La Fortuna in September?

There are normally 5 hours of bright sunshine each day in La Fortuna in September - that's 44% of daylight hours.

Does it rain in La Fortuna in September?

There are usually 23 days with some rain in La Fortuna in September and the average monthly rainfall is 413mm.

La Fortuna September sunrise & sunset times

Browse the sunrise and sunset times for La Fortuna in September 2025. Select a month to view La Fortuna sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:29 17:48
Monday, 15th September 2025 05:28 17:39
Tuesday, 30th September 2025 05:27 17:29

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