Weather in San Juan in September 2017

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 2017.

Key weather averages for San Juan in September

  • 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

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

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

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Expires at 23:59 on Saturday 30th September 2017 · View all Thomas Cook Airlines offers

More about San Juan

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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).

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

San Juan sunrise & sunset times for September 2017

Browse the sunrise & sunset times for San Juan in September 2017. Select a month to view San Juan sunrise & sunset times for the next twelve months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st September 2017 06:10 18:38
Saturday, 2nd September 2017 06:10 18:38
Sunday, 3rd September 2017 06:10 18:37
Monday, 4th September 2017 06:10 18:36
Tuesday, 5th September 2017 06:11 18:35
Wednesday, 6th September 2017 06:11 18:34
Thursday, 7th September 2017 06:11 18:33
Friday, 8th September 2017 06:11 18:33
Saturday, 9th September 2017 06:11 18:32
Sunday, 10th September 2017 06:11 18:31
Monday, 11th September 2017 06:12 18:30
Tuesday, 12th September 2017 06:12 18:29
Wednesday, 13th September 2017 06:12 18:28
Thursday, 14th September 2017 06:12 18:27
Friday, 15th September 2017 06:12 18:26
Saturday, 16th September 2017 06:12 18:26
Sunday, 17th September 2017 06:13 18:25
Monday, 18th September 2017 06:13 18:24
Tuesday, 19th September 2017 06:13 18:23
Wednesday, 20th September 2017 06:13 18:22
Thursday, 21st September 2017 06:13 18:21
Friday, 22nd September 2017 06:13 18:20
Saturday, 23rd September 2017 06:13 18:19
Sunday, 24th September 2017 06:14 18:19
Monday, 25th September 2017 06:14 18:18
Tuesday, 26th September 2017 06:14 18:17
Wednesday, 27th September 2017 06:14 18:16
Thursday, 28th September 2017 06:14 18:15
Friday, 29th September 2017 06:15 18:14
Saturday, 30th September 2017 06:15 18:13
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Expires at 23:59 on Saturday 30th September 2017 · View all Thomas Cook Airlines offers

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San Juan weather by month

Check San Juan 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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