Weather in San Jose in September 2018

Expect 24°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in San Jose in September. Check more long-term weather averages for San Jose in September before you book your next holiday to Costa Rica in 2018.

Key weather averages for San Jose in September

  • 24°C maximum daytime temperature in September in San Jose24
    24°C max day temperature
  • 6 hours of sunshine per day (49% of daylight hours) in September in San Jose6
    6 hours of sunshine per day
  • 24 days with some rainfall in September in San Jose24
    24 days with some rainfall
  • 17°C minimum night-time temperature in September in San Jose17
    17°C min night temperature
  • 12 hours of daylight per day in September in San Jose12
    12 hours of daylight per day
  • Low heat & humidity in September in San JoseL
    Low heat & humidity
  • 372 mm monthly rainfall in September in San Jose372
    372 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in San Jose11
    11+ (Extreme) UV index

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec All months

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

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More about San Jose

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Guide to San Jose weather in September

The average maximum daytime temperature in San Jose in September is a warm 24°C (75°F) with low heat & humidity. The average night-time temperature is usually a comfortable 17°C (63°F). There are usually 6 hours of bright sunshine each day, which represents 49% of the 12 hours of daylight.

Expect 372mm (14.6 inches) of rainfall across the whole of September with 24 days with some rain falling. Maximum UV levels will be extreme (11+ UV index) at midday when the skies are clear.

The weather in San Jose in September is represented by San Jose.

San Jose sunrise & sunset times for September 2018

Browse the sunrise & sunset times for San Jose in September 2018. Select a month to view San Jose sunrise & sunset times for the next twelve months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Saturday, 1st September 2018 05:27 17:45
Sunday, 2nd September 2018 05:27 17:45
Monday, 3rd September 2018 05:27 17:44
Tuesday, 4th September 2018 05:27 17:43
Wednesday, 5th September 2018 05:27 17:43
Thursday, 6th September 2018 05:27 17:42
Friday, 7th September 2018 05:27 17:42
Saturday, 8th September 2018 05:27 17:41
Sunday, 9th September 2018 05:27 17:40
Monday, 10th September 2018 05:26 17:40
Tuesday, 11th September 2018 05:26 17:39
Wednesday, 12th September 2018 05:26 17:39
Thursday, 13th September 2018 05:26 17:38
Friday, 14th September 2018 05:26 17:37
Saturday, 15th September 2018 05:26 17:37
Sunday, 16th September 2018 05:26 17:36
Monday, 17th September 2018 05:26 17:35
Tuesday, 18th September 2018 05:26 17:35
Wednesday, 19th September 2018 05:26 17:34
Thursday, 20th September 2018 05:26 17:34
Friday, 21st September 2018 05:26 17:33
Saturday, 22nd September 2018 05:25 17:32
Sunday, 23rd September 2018 05:25 17:32
Monday, 24th September 2018 05:25 17:31
Tuesday, 25th September 2018 05:25 17:30
Wednesday, 26th September 2018 05:25 17:30
Thursday, 27th September 2018 05:25 17:29
Friday, 28th September 2018 05:25 17:29
Saturday, 29th September 2018 05:25 17:28
Sunday, 30th September 2018 05:25 17:27
  • Book online & save up to 9% on holidays to Costa Rica
  • FREE kids places & low deposits also available
  • Say Hello to TUI - the new name in holidays

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San Jose weather by month

Check San Jose weather for a particular month by selecting from the list below. Monthly weather guides include figures for temperature, rainfall, sunshine hours and sea temperature plus daily sunrise & sunset times.

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