Weather in San Juan in September 2019

  • 30°C maximum daytime temperature in September in San Juan30
    30°C max day temperature
  • 8 hours of sunshine per day (64% of daylight hours) in September in San Juan8
    8 hours of sunshine per day
  • 18 days with some rainfall in September in San Juan18
    18 days with some rainfall
  • 23°C minimum night-time temperature in September in San Juan23
    23°C min night temperature
  • 12 hours of daylight per day in September in San Juan12
    12 hours of daylight per day
  • High heat & humidity in September in San JuanH
    High heat & humidity
  • 188 mm monthly rainfall in September in San Juan188
    188 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in San Juan11
    11+ (Extreme) UV index
  • 29°C sea temperature in September in San Juan29
    29°C sea temperature

Going to San Juan? Find the best month to visit San Juan based on the weather.

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Expect 30°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in San Juan in September. Check more long-term weather averages for San Juan in September before you book your next holiday to Puerto Rico in 2019/2020.

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More about San Juan

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

Guide to San Juan weather in September

The average maximum daytime temperature in San Juan in September is a hot 30°C (86°F) with high heat & humidity. The average night-time temperature is usually a warm 23°C (73°F). There are usually 8 hours of bright sunshine each day, which represents 64% of the 12 hours of daylight.

Expect 188mm (7.4 inches) of rainfall across the whole of September with 18 days with some rain falling. Maximum UV levels will be extreme (11+ UV index) at midday when the skies are clear.

The average sea temperature in and around San Juan in September is 29°C (84°F).

San Juan sunrise & sunset times for September 2019

Browse the sunrise & sunset times for San Juan in September 2019. Select a month to view San Juan sunrise & sunset times for the next twelve months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Sunday, 1st September 2019 06:10 18:39
Monday, 2nd September 2019 06:10 18:38
Tuesday, 3rd September 2019 06:10 18:37
Wednesday, 4th September 2019 06:10 18:36
Thursday, 5th September 2019 06:10 18:36
Friday, 6th September 2019 06:11 18:35
Saturday, 7th September 2019 06:11 18:34
Sunday, 8th September 2019 06:11 18:33
Monday, 9th September 2019 06:11 18:32
Tuesday, 10th September 2019 06:11 18:31
Wednesday, 11th September 2019 06:11 18:30
Thursday, 12th September 2019 06:12 18:30
Friday, 13th September 2019 06:12 18:29
Saturday, 14th September 2019 06:12 18:28
Sunday, 15th September 2019 06:12 18:27
Monday, 16th September 2019 06:12 18:26
Tuesday, 17th September 2019 06:12 18:25
Wednesday, 18th September 2019 06:13 18:24
Thursday, 19th September 2019 06:13 18:23
Friday, 20th September 2019 06:13 18:23
Saturday, 21st September 2019 06:13 18:22
Sunday, 22nd September 2019 06:13 18:21
Monday, 23rd September 2019 06:13 18:20
Tuesday, 24th September 2019 06:14 18:19
Wednesday, 25th September 2019 06:14 18:18
Thursday, 26th September 2019 06:14 18:17
Friday, 27th September 2019 06:14 18:16
Saturday, 28th September 2019 06:14 18:16
Sunday, 29th September 2019 06:14 18:15
Monday, 30th September 2019 06:15 18:14
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