Guam weather in August 2019

  • 31°C maximum daytime temperature in August in Guam (Agana)31
    31°C max day temperature
  • 5 hours of sunshine per day
  • 20 days with some rainfall in August in Guam (Agana)20
    20 days with some rainfall
  • 25°C minimum night-time temperature in August in Guam (Agana)25
    25°C min night temperature
  • 13 hours of daylight per day in August in Guam (Agana)13
    13 hours of daylight per day
  • Very high heat & humidity in August in Guam (Agana)VH
    Very High heat & humidity
  • 363 mm monthly rainfall in August in Guam (Agana)363
    363 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in August in Guam (Agana)11
    11+ (Extreme) UV index
  • 29°C sea temperature in August in Guam (Agana)29
    29°C sea temperature

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Expect 31°C daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in Guam in August. Check more long-term weather averages for Guam in August before you book your next holiday to Guam in 2019/2020. The August weather averages shown above are for Agana.

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More about Guam

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The August weather guide for Guam, represented by Agana, 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.

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

Guide to Guam weather in August

The average maximum daytime temperature in Guam in August is a hot 31°C (88°F) with very high heat & humidity. The average night-time temperature is usually a warm 25°C (77°F). There are usually 5 hours of bright sunshine each day, which represents 37% of the 13 hours of daylight.

Expect 363mm (14.3 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 Guam in August is 29°C (84°F).

The weather in Guam in August is represented by Agana.

Guam sunrise & sunset times for August 2019

Browse the sunrise & sunset times for Guam in August 2019. Select a month to view Guam sunrise & sunset times for the next twelve months. The Guam sunrise & sunset times shown below are for Agana.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st August 2019 06:06 18:49
Friday, 2nd August 2019 06:06 18:49
Saturday, 3rd August 2019 06:06 18:48
Sunday, 4th August 2019 06:06 18:48
Monday, 5th August 2019 06:07 18:47
Tuesday, 6th August 2019 06:07 18:47
Wednesday, 7th August 2019 06:07 18:47
Thursday, 8th August 2019 06:07 18:46
Friday, 9th August 2019 06:07 18:46
Saturday, 10th August 2019 06:07 18:45
Sunday, 11th August 2019 06:08 18:45
Monday, 12th August 2019 06:08 18:44
Tuesday, 13th August 2019 06:08 18:44
Wednesday, 14th August 2019 06:08 18:43
Thursday, 15th August 2019 06:08 18:43
Friday, 16th August 2019 06:08 18:42
Saturday, 17th August 2019 06:08 18:42
Sunday, 18th August 2019 06:09 18:41
Monday, 19th August 2019 06:09 18:41
Tuesday, 20th August 2019 06:09 18:40
Wednesday, 21st August 2019 06:09 18:40
Thursday, 22nd August 2019 06:09 18:39
Friday, 23rd August 2019 06:09 18:38
Saturday, 24th August 2019 06:09 18:38
Sunday, 25th August 2019 06:09 18:37
Monday, 26th August 2019 06:09 18:37
Tuesday, 27th August 2019 06:09 18:36
Wednesday, 28th August 2019 06:09 18:35
Thursday, 29th August 2019 06:09 18:35
Friday, 30th August 2019 06:09 18:34
Saturday, 31st August 2019 06:10 18:33
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