Weather in San Juan in August 2018

  • 30°C maximum daytime temperature in August in San Juan30
    30°C max day temperature
  • 9 hours of sunshine per day (68% of daylight hours) in August in San Juan9
    9 hours of sunshine per day
  • 20 days with some rainfall in August in San Juan20
    20 days with some rainfall
  • 24°C minimum night-time temperature in August in San Juan24
    24°C min night temperature
  • 13 hours of daylight per day in August in San Juan13
    13 hours of daylight per day
  • High heat & humidity in August in San JuanH
    High heat & humidity
  • 195 mm monthly rainfall in August in San Juan195
    195 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in August in San Juan11
    11+ (Extreme) UV index
  • 28°C sea temperature in August in San Juan28
    28°C sea temperature

Expect 30°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in San Juan in August. Check more long-term weather averages for San Juan in August before you book your next holiday to Puerto Rico in 2018.

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Guide to San Juan weather in August

The average maximum daytime temperature in San Juan in August is a hot 30°C (86°F) with high heat & humidity. The average night-time temperature is usually a warm 24°C (75°F). There are usually 9 hours of bright sunshine each day, which represents 68% of the 13 hours of daylight.

Expect 195mm (7.7 inches) of rainfall across the whole of August with 20 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 August is 28°C (82°F).

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

San Juan sunrise & sunset times for August 2018

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


Date Sunrise times Sunset times
Wednesday, 1st August 2018 06:02 18:59
Thursday, 2nd August 2018 06:02 18:59
Friday, 3rd August 2018 06:03 18:58
Saturday, 4th August 2018 06:03 18:58
Sunday, 5th August 2018 06:03 18:57
Monday, 6th August 2018 06:04 18:57
Tuesday, 7th August 2018 06:04 18:56
Wednesday, 8th August 2018 06:04 18:56
Thursday, 9th August 2018 06:05 18:55
Friday, 10th August 2018 06:05 18:54
Saturday, 11th August 2018 06:05 18:54
Sunday, 12th August 2018 06:05 18:53
Monday, 13th August 2018 06:06 18:53
Tuesday, 14th August 2018 06:06 18:52
Wednesday, 15th August 2018 06:06 18:51
Thursday, 16th August 2018 06:06 18:51
Friday, 17th August 2018 06:07 18:50
Saturday, 18th August 2018 06:07 18:49
Sunday, 19th August 2018 06:07 18:49
Monday, 20th August 2018 06:07 18:48
Tuesday, 21st August 2018 06:08 18:47
Wednesday, 22nd August 2018 06:08 18:46
Thursday, 23rd August 2018 06:08 18:46
Friday, 24th August 2018 06:08 18:45
Saturday, 25th August 2018 06:08 18:44
Sunday, 26th August 2018 06:09 18:43
Monday, 27th August 2018 06:09 18:43
Tuesday, 28th August 2018 06:09 18:42
Wednesday, 29th August 2018 06:09 18:41
Thursday, 30th August 2018 06:09 18:40
Friday, 31st August 2018 06:10 18:39
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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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