Guam weather live forecast

Today's maximum temperature in Guam is expected to be 84°F. Select a day from the live weather forecast for Guam (Agana) for more weather parameters.

Monday
8th Dec
84

79

5

8
Tuesday
9th Dec
86

79

6

7
Wednesday
10th Dec
86

79

7

8
Thursday
11th Dec
86

79

7

8
Friday
12th Dec
86

79

5

9

5-day weather forecast updated at 04:00 on Sunday 7th December 2025 GMT

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The 5-day weather forecast for Guam, represented by Agana, (Agana) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Guam weather forecast by day

Below are the detailed weather forecasts for Guam for the next 5 days. The forecasts shown are for Agana and may not represent the whole of Guam. Browse more destinations in Guam to view more weather forecasts.

Guam weather for Monday 8th December 2025

Expect isolated thunderstorms in Guam with a maximum temperature of 84°F, moderate levels of heat & humidity, maximum UV of 8 (Very High) and 5 hours of bright sunshine. There are 0-2 mm of rainfall expected with 55% chance of some rain and a gentle breeze of 10 mph from the east.

84
°F maximum temperature
79
°F minimum temperature
isolated thunderstorms
5
hours of sunshine
8
UV index (Very High)
55
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
10
mph wind from E

Guam weather for Tuesday 9th December 2025

Expect scattered clouds in Guam with a maximum temperature of 86°F, moderate levels of heat & humidity, maximum UV of 7 (High) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 11 mph from the east.

86
°F maximum temperature
79
°F minimum temperature
scattered clouds
6
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
M
moderate heat & humidity
11
mph wind from E

Guam weather for Wednesday 10th December 2025

Expect isolated thunderstorms in Guam with a maximum temperature of 86°F, moderate levels of heat & humidity, maximum UV of 8 (Very High) and 7 hours of bright sunshine. There are 2-5 mm of rainfall expected with 51% chance of some rain and a gentle breeze of 12 mph from the east.

86
°F maximum temperature
79
°F minimum temperature
isolated thunderstorms
7
hours of sunshine
8
UV index (Very High)
51
% chance of some rain
<5
mm of rainfall expected
M
moderate heat & humidity
12
mph wind from E

Guam weather for Thursday 11th December 2025

Expect scattered clouds in Guam with a maximum temperature of 86°F, moderate levels of heat & humidity, maximum UV of 8 (Very High) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 12 mph from the east.

86
°F maximum temperature
79
°F minimum temperature
scattered clouds
7
hours of sunshine
8
UV index (Very High)
0
mm of rainfall expected
M
moderate heat & humidity
12
mph wind from E

Guam weather for Friday 12th December 2025

Expect isolated thunderstorms in Guam with a maximum temperature of 86°F, moderate levels of heat & humidity, maximum UV of 9 (Very High) and 5 hours of bright sunshine. There are 2-5 mm of rainfall expected with 59% chance of some rain and a gentle breeze of 11 mph from the east.