Costa Rica weather in September 2023

  • 24°C maximum daytime temperature in September in Costa Rica (San Jose)24
    24°C max day temperature
  • 6 hours of sunshine per day
  • 24 days with some rainfall in September in Costa Rica (San Jose)24
    24 days with some rainfall
  • 17°C minimum night-time temperature in September in Costa Rica (San Jose)17
    17°C min night temperature
  • 12 hours of daylight per day in September in Costa Rica (San Jose)12
    12 hours of daylight per day
  • Low heat & humidity in September in Costa Rica (San Jose)L
    Low heat & humidity
  • 372 mm monthly rainfall in September in Costa Rica (San Jose)372
    372 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in Costa Rica (San Jose)11
    11+ (Extreme) UV index

Below are average maximum temperatures at popular destinations in Costa Rica in September. Select a destination to see more weather parameters.

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Recommended for Costa Rica

The September weather guide for Costa Rica (San Jose) 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.

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

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More about Costa Rica

How hot is it in Costa Rica in September?

Daytime temperatures usually reach 24°C in San Jose, Costa Rica in September, falling to 17°C at night.

How sunny is it in Costa Rica in September?

There are normally 6 hours of bright sunshine each day in San Jose, Costa Rica in September - that's 49% of daylight hours.

Does it rain in Costa Rica in September?

There are usually 24 days with some rain in San Jose, Costa Rica in September and the average monthly rainfall is 372mm.

Costa Rica September sunrise & sunset times

Browse the sunrise and sunset times for Costa Rica in September 2023. Select a month to view Costa Rica sunrise and sunset times for the next 12 months. The Costa Rica sunrise and sunset times shown below are for San Jose.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st September 2023 05:27 17:45
Friday, 15th September 2023 05:26 17:37
Saturday, 30th September 2023 05:25 17:27

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