San Juan weather in August 2019

  • 30°C maximum daytime temperature in August in San Juan30
    30°C max day temperature
  • 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
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The August weather guide for San Juan, Puerto Rico shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

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

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).

San Juan sunrise & sunset times for August 2019

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st August 2019 06:02 18:59
Friday, 16th August 2019 06:06 18:51
Saturday, 31st August 2019 06:10 18:40
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