Guam weather in January 2020

  • 30°C maximum daytime temperature in January in Guam (Agana)30
    30°C max day temperature
  • 6 hours of sunshine per day
  • 23 days with some rainfall in January in Guam (Agana)23
    23 days with some rainfall
  • 24°C minimum night-time temperature in January in Guam (Agana)24
    24°C min night temperature
  • 11 hours of daylight per day in January in Guam (Agana)11
    11 hours of daylight per day
  • High heat & humidity in January in Guam (Agana)H
    High heat & humidity
  • 130 mm monthly rainfall in January in Guam (Agana)130
    130 mm of monthly rainfall
  • UV (maximum) index 10 (Very High) in January in Guam (Agana)10
    10 (Very High) UV index
  • 28°C sea temperature in January in Guam (Agana)28
    28°C sea temperature

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Expect 30°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Guam in January. Check more long-term weather averages for Guam in January before you book your next holiday to Guam in 2020/2021. The January 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 January 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 January

The average maximum daytime temperature in Guam in January 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 6 hours of bright sunshine each day, which represents 50% of the 11 hours of daylight.

Expect 130mm (5.1 inches) of rainfall across the whole of January with 23 days with some rain falling. Maximum UV levels will be very high (10 UV index) at midday when the skies are clear.

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

The weather in Guam in January is represented by Agana.

Guam sunrise & sunset times for January 2020

Browse the sunrise & sunset times for Guam in January 2020. Select a month to view Guam sunrise & sunset times for the next twelve months. The Guam sunrise & sunset times shown below are for Agana.


Date Sunrise times Sunset times
Wednesday, 1st January 2020 06:44 18:05
Thursday, 2nd January 2020 06:44 18:05
Friday, 3rd January 2020 06:44 18:06
Saturday, 4th January 2020 06:45 18:06
Sunday, 5th January 2020 06:45 18:07
Monday, 6th January 2020 06:46 18:07
Tuesday, 7th January 2020 06:46 18:08
Wednesday, 8th January 2020 06:46 18:09
Thursday, 9th January 2020 06:46 18:09
Friday, 10th January 2020 06:47 18:10
Saturday, 11th January 2020 06:47 18:10
Sunday, 12th January 2020 06:47 18:11
Monday, 13th January 2020 06:47 18:11
Tuesday, 14th January 2020 06:48 18:12
Wednesday, 15th January 2020 06:48 18:13
Thursday, 16th January 2020 06:48 18:13
Friday, 17th January 2020 06:48 18:14
Saturday, 18th January 2020 06:48 18:14
Sunday, 19th January 2020 06:48 18:15
Monday, 20th January 2020 06:48 18:15
Tuesday, 21st January 2020 06:48 18:16
Wednesday, 22nd January 2020 06:49 18:16
Thursday, 23rd January 2020 06:49 18:17
Friday, 24th January 2020 06:49 18:17
Saturday, 25th January 2020 06:49 18:18
Sunday, 26th January 2020 06:49 18:18
Monday, 27th January 2020 06:48 18:19
Tuesday, 28th January 2020 06:48 18:19
Wednesday, 29th January 2020 06:48 18:20
Thursday, 30th January 2020 06:48 18:20
Friday, 31st January 2020 06:48 18:21
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