easeweather.com
Guam Island
Dededo Village
Guam Island
Yigo Village More Locations
Guam weather

Weather in Guam Island for December 2025

Your guide to Guam Island weather in December - trends and predictions

    Temperatures

  • In general, the average temperature in Guam Island at the beginning of December is 29.1 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 28.4 °C by the end of December.

    • Rain 🌧️

  • Guam Island experiences heavy rainfall in December, with over 20 rainy days and an average total precipitation 110.7 mm.

Average dry days
6
Dry days
Average rainy days
25
Rainy days
Average snowy days
0
Snow days
Average temperatures
29°/26°
Temperatures
Average wind speed
29 km/h
Avg max wind
Average humidity
79 %
Avg humidity

Guam Island Weather December

Move between months or click on a day
November
January
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Moderate rain at times
30°
2
Patchy rain possible
30°
3
Moderate or heavy rain shower
28°
4
Moderate or heavy rain shower
29°
5
Overcast
30°
6
Moderate rain at times
29°
7
Moderate rain at times
28°
8
Patchy rain possible
30°
9
Cloudy
30°
10
Partly cloudy
29°
11
Patchy rain possible
28°
12
Patchy rain possible
29°
13
Moderate rain at times
29°
14
Moderate rain at times
29°
15
Moderate rain at times
29°
16
Moderate rain at times
29°
17
Patchy rain possible
29°
18
Moderate or heavy rain shower
28°
19
Heavy rain at times
28°
20
Heavy rain at times
28°
21
Patchy rain possible
28°
22
Moderate rain at times
29°
23
Patchy rain possible
29°
24
Moderate rain at times
28°
25
Moderate rain at times
28°
26
Patchy rain possible
28°
27
Patchy rain possible
29°
28
Patchy rain possible
29°
29
Moderate rain at times
28°
30
Cloudy
29°
31
Patchy rain possible
28°

Temperatures trend during December in Guam Island

See the weather trend as well as the moving average line

December weather in Guam Island day by day

Click on a date for more information
November January
Date Weather Temperatures Rain UV More
1 Dec. Moderate rain at times
Moderate rain at times
 30° /27° 1.7 mm 7
2 Dec. Patchy rain possible
Patchy rain possible
 30° /26° 3.1 mm 6
3 Dec. Moderate or heavy rain shower
Moderate or heavy rain shower
 28° /26° 15.8 mm 6
4 Dec. Moderate or heavy rain shower
Moderate or heavy rain shower
 29° /25° 20.1 mm 6
5 Dec. Overcast
Overcast
 30° /27° 0 mm 7
6 Dec. Moderate rain at times
Moderate rain at times
 29° /27° 4.5 mm 6
7 Dec. Moderate rain at times
Moderate rain at times
 28° /27° 1.9 mm 6
8 Dec. Patchy rain possible
Patchy rain possible
 30° /27° 0.2 mm 6
9 Dec. Cloudy
Cloudy
 30° /26° 0 mm 7
10 Dec. Partly cloudy
Partly cloudy
 29° /26° 0 mm 7
11 Dec. Patchy rain possible
Patchy rain possible
 28° /26° 2.6 mm 6
12 Dec. Patchy rain possible
Patchy rain possible
 29° /27° 0.2 mm 6
13 Dec. Moderate rain at times
Moderate rain at times
 29° /26° 2.1 mm 6
14 Dec. Moderate rain at times
Moderate rain at times
 29° /27° 2.1 mm 6
15 Dec. Moderate rain at times
Moderate rain at times
 29° /27° 2.7 mm 6
16 Dec. Moderate rain at times
Moderate rain at times
 29° /25° 7.2 mm 6
17 Dec. Patchy rain possible
Patchy rain possible
 29° /26° 2.1 mm 6
18 Dec. Moderate or heavy rain shower
Moderate or heavy rain shower
 28° /26° 10.4 mm 6
19 Dec. Heavy rain at times
Heavy rain at times
 28° /26° 7.8 mm 6
20 Dec. Heavy rain at times
Heavy rain at times
 28° /26° 3.7 mm 6
21 Dec. Patchy rain possible
Patchy rain possible
 28° /27° 3.2 mm 6
22 Dec. Moderate rain at times
Moderate rain at times
 29° /27° 5.3 mm 6
23 Dec. Patchy rain possible
Patchy rain possible
 29° /26° 1.5 mm 6
24 Dec. Moderate rain at times
Moderate rain at times
 28° /26° 1.6 mm 6
25 Dec. Moderate rain at times
Moderate rain at times
 28° /26° 4.5 mm 6
26 Dec. Patchy rain possible
Patchy rain possible
 28° /27° 0.9 mm 6
27 Dec. Patchy rain possible
Patchy rain possible
 29° /27° 0.8 mm 6
28 Dec. Patchy rain possible
Patchy rain possible
 29° /26° 1.2 mm 6
29 Dec. Moderate rain at times
Moderate rain at times
 28° /26° 3 mm 6
30 Dec. Cloudy
Cloudy
 29° /27° 0.1 mm 6
31 Dec. Patchy rain possible
Patchy rain possible
 28° /27° 0.4 mm 6
Next
Important Notice
Our weather forecast for Guam Island in December is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Guam Island forecast closer to your planned date for the most up-to-date weather information.
Change Month
‹
›

Guam Island in December - FAQ

What are the expected maximum and minimum temperatures in Guam Island during December?
During December, expect a variety of temperatures with highs around 29° and lows near 26°, suitable for diverse activities and preferences.
How much rainfall should be expected in Guam Island during December?
Significant rainfall exceeding 110.7 mm is expected in Guam Island during December, occurring over more than 25 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Guam Island during December?
The average wind speed in Guam Island during December is 29 km/h, suggesting breezy to windy conditions, depending on your activities.

December rainfall patterns in Guam Island

Explore the daily rainfall trends and prepare for Guam Islands December weather 💧

UV exposure in Guam Island during December

Stay informed about UV levels for safe outdoor activities throughout the month of December ☀️

Quick links

More Guam Island weather pages
You are here
Location coordinates Where is Guam Island?

Get accurate weather forecasts for Guam Island, located at latitude 13.431 and longitude 144.753. Stay updated with localized weather information tailored for Guam Island.

Found a mistake?
We appreciate your attention to details. Tell us here.