Guam weather in December 2019

  • 30°C maximum daytime temperature in December in Guam (Agana)30
    30°C max day temperature
  • 5 hours of sunshine per day (41% of daylight hours) in December in Guam5
    5 hours of sunshine per day
  • 23 days with some rainfall in December in Guam (Agana)23
    23 days with some rainfall
  • 24°C minimum night-time temperature in December in Guam (Agana)24
    24°C min night temperature
  • 11 hours of daylight per day in December in Guam (Agana)11
    11 hours of daylight per day
  • High heat & humidity in December in Guam (Agana)H
    High heat & humidity
  • 150 mm monthly rainfall in December in Guam (Agana)150
    150 mm of monthly rainfall
  • UV (maximum) index 9 (Very High) in December in Guam (Agana)9
    9 (Very High) UV index
  • 28°C sea temperature in December in Guam (Agana)28
    28°C sea temperature

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Expect 30°C daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in Guam in December. Check more long-term weather averages for Guam in December before you book your next holiday to Guam in 2019/2020. The December weather averages shown above are for Agana.

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More about Guam

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

The December 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 December

The average maximum daytime temperature in Guam in December 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 5 hours of bright sunshine each day, which represents 41% of the 11 hours of daylight.

Expect 150mm (5.9 inches) of rainfall across the whole of December with 23 days with some rain falling. Maximum UV levels will be very high (9 UV index) at midday when the skies are clear.

The average sea temperature in and around Guam in December is 28°C (82°F).

The weather in Guam in December is represented by Agana.

Guam sunrise & sunset times for December 2019

Browse the sunrise & sunset times for Guam in December 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
Sunday, 1st December 2019 06:28 17:52
Monday, 2nd December 2019 06:28 17:52
Tuesday, 3rd December 2019 06:29 17:52
Wednesday, 4th December 2019 06:29 17:52
Thursday, 5th December 2019 06:30 17:53
Friday, 6th December 2019 06:31 17:53
Saturday, 7th December 2019 06:31 17:53
Sunday, 8th December 2019 06:32 17:53
Monday, 9th December 2019 06:32 17:54
Tuesday, 10th December 2019 06:33 17:54
Wednesday, 11th December 2019 06:33 17:55
Thursday, 12th December 2019 06:34 17:55
Friday, 13th December 2019 06:34 17:55
Saturday, 14th December 2019 06:35 17:56
Sunday, 15th December 2019 06:36 17:56
Monday, 16th December 2019 06:36 17:56
Tuesday, 17th December 2019 06:37 17:57
Wednesday, 18th December 2019 06:37 17:57
Thursday, 19th December 2019 06:38 17:58
Friday, 20th December 2019 06:38 17:58
Saturday, 21st December 2019 06:39 17:59
Sunday, 22nd December 2019 06:39 17:59
Monday, 23rd December 2019 06:40 18:00
Tuesday, 24th December 2019 06:40 18:00
Wednesday, 25th December 2019 06:41 18:01
Thursday, 26th December 2019 06:41 18:01
Friday, 27th December 2019 06:42 18:02
Saturday, 28th December 2019 06:42 18:02
Sunday, 29th December 2019 06:42 18:03
Monday, 30th December 2019 06:43 18:04
Tuesday, 31st December 2019 06:43 18:04
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