Costa Rica weather in September

Check the Weather in Costa Rica in September before you book your next holiday. This gives the best indication of the weather in September and includes figures for temperature, sunshine and rainfall. The Costa Rica september weather guide shown below is for San Jose.

  • 24°C maximum daytime temperature in September in Costa Rica (San Jose)24
    24°C max day temperature
  • 6 hours of sunshine per day (49% of daylight hours) in September in Costa Rica6
    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

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

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