Weather in Puerto Rico in September 2018

  • 30°C maximum daytime temperature in September in Puerto Rico (San Juan)30
    30°C max day temperature
  • 8 hours of sunshine per day (64% of daylight hours) in September in Puerto Rico8
    8 hours of sunshine per day
  • 18 days with some rainfall in September in Puerto Rico (San Juan)18
    18 days with some rainfall
  • 23°C minimum night-time temperature in September in Puerto Rico (San Juan)23
    23°C min night temperature
  • 12 hours of daylight per day in September in Puerto Rico (San Juan)12
    12 hours of daylight per day
  • High heat & humidity in September in Puerto Rico (San Juan)H
    High heat & humidity
  • 188 mm monthly rainfall in September in Puerto Rico (San Juan)188
    188 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in Puerto Rico (San Juan)11
    11+ (Extreme) UV index
  • 29°C sea temperature in September in Puerto Rico (San Juan)29
    29°C sea temperature

Going to Puerto Rico? Find the best month to visit Puerto Rico based on the weather.

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

Expect 30°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Puerto Rico in September. Check more long-term weather averages for Puerto Rico in September before you book your next holiday to Puerto Rico in 2018. The September weather averages shown above are for San Juan.

  • Find cheap flights to Puerto Rico with Skyscanner
  • Search by departure airport to find best airline routes
  • Enter exact dates, months or find the cheapest month

More about Puerto Rico

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

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

Guide to Puerto Rico weather in September

The average maximum daytime temperature in Puerto Rico 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 Puerto Rico in September is 29°C (84°F).

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

Puerto Rico sunrise & sunset times for September 2018

Browse the sunrise & sunset times for Puerto Rico in September 2018. Select a month to view Puerto Rico sunrise & sunset times for the next twelve months. The Puerto Rico sunrise & sunset times shown below are for San Juan.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Saturday, 1st September 2018 06:10 18:39
Sunday, 2nd September 2018 06:10 18:38
Monday, 3rd September 2018 06:10 18:37
Tuesday, 4th September 2018 06:10 18:36
Wednesday, 5th September 2018 06:11 18:35
Thursday, 6th September 2018 06:11 18:34
Friday, 7th September 2018 06:11 18:34
Saturday, 8th September 2018 06:11 18:33
Sunday, 9th September 2018 06:11 18:32
Monday, 10th September 2018 06:11 18:31
Tuesday, 11th September 2018 06:12 18:30
Wednesday, 12th September 2018 06:12 18:29
Thursday, 13th September 2018 06:12 18:28
Friday, 14th September 2018 06:12 18:28
Saturday, 15th September 2018 06:12 18:27
Sunday, 16th September 2018 06:12 18:26
Monday, 17th September 2018 06:12 18:25
Tuesday, 18th September 2018 06:13 18:24
Wednesday, 19th September 2018 06:13 18:23
Thursday, 20th September 2018 06:13 18:22
Friday, 21st September 2018 06:13 18:21
Saturday, 22nd September 2018 06:13 18:21
Sunday, 23rd September 2018 06:13 18:20
Monday, 24th September 2018 06:14 18:19
Tuesday, 25th September 2018 06:14 18:18
Wednesday, 26th September 2018 06:14 18:17
Thursday, 27th September 2018 06:14 18:16
Friday, 28th September 2018 06:14 18:15
Saturday, 29th September 2018 06:15 18:15
Sunday, 30th September 2018 06:15 18:14
  • Save an extra 10% on worldwide car hire
  • Book with the exclusive Argus Car Hire discount code
  • Travel before 31st December 2018 (inclusive)
Show discount code ******vel

Expires at 23:59 on Tuesday 31st July 2018 · View all Argus Car Hire offers

Back to top

More Puerto Rico destinations

All destinations (A to Z)

Can't see your chosen destination? Use our A to Z search to find your required the holiday weather guide:

A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z  

Related posts

Popular travel offers

Top ^