Guam Island
January
Weather in Guam Island for January 2026
Your guide to Guam Island weather in January - trends and predictions
In general, the average temperature in Guam Island at the beginning of January is 28.3 °C. As the month progressed, temperatures tended to slightly increase, reaching an average of 28.6 °C by the end of January.
Guam Island experiences heavy rainfall in January, with over 20 rainy days and an average total precipitation 68.3 mm.
Temperatures
Rain 🌧️
9
Dry days
22
Rainy days
0
Snow days
29°/26°
Temperatures
28 km/h
Avg max wind
76 %
Avg humidity
Guam Island Weather January
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Temperatures trend during January in Guam Island
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January weather in Guam Island day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Jan. |  Patchy rain possible | 29° /26° | 0.5 mm | 6 | |
| 2 Jan. | Patchy rain possible | 29° /26° | 0.3 mm | 6 | |
| 3 Jan. | Patchy rain possible | 28° /26° | 2.4 mm | 6 | |
| 4 Jan. | Patchy rain possible | 28° /26° | 1.1 mm | 6 | |
| 5 Jan. |  Moderate rain at times | 28° /26° | 3.1 mm | 6 | |
| 6 Jan. | Moderate rain at times | 29° /27° | 2.5 mm | 6 | |
| 7 Jan. | Moderate or heavy rain shower | 27° /25° | 31.2 mm | 6 | |
| 8 Jan. | Patchy rain possible | 28° /25° | 0.2 mm | 6 | |
| 9 Jan. | Moderate rain at times | 28° /26° | 2.9 mm | 6 | |
| 10 Jan. |  Overcast | 29° /27° | 0.6 mm | 6 | |
| 11 Jan. | Patchy rain possible | 29° /26° | 0.9 mm | 6 | |
| 12 Jan. | Moderate rain at times | 29° /26° | 0.8 mm | 6 | |
| 13 Jan. | Patchy rain possible | 29° /26° | 1 mm | 6 | |
| 14 Jan. | Overcast | 29° /26° | 0 mm | 6 | |
| 15 Jan. |  Heavy rain at times | 29° /26° | 2.5 mm | 6 | |
| 16 Jan. | Patchy rain possible | 29° /26° | 0.3 mm | 6 | |
| 17 Jan. | Moderate rain at times | 28° /26° | 3.6 mm | 6 | |
| 18 Jan. | Overcast | 29° /26° | 0 mm | 6 | |
| 19 Jan. | Overcast | 29° /26° | 0 mm | 6 | |
| 20 Jan. | Patchy rain possible | 29° /26° | 0.3 mm | 6 | |
| 21 Jan. | Patchy rain possible | 28° /26° | 0.1 mm | 6 | |
| 22 Jan. | Patchy rain possible | 29° /26° | 0.1 mm | 6 | |
| 23 Jan. | Patchy rain possible | 29° /26° | 0.3 mm | 6 | |
| 24 Jan. |  Cloudy | 29° /26° | 0 mm | 6 | |
| 25 Jan. | Patchy rain possible | 29° /26° | 0.2 mm | 6 | |
| 26 Jan. | Patchy rain possible | 28° /25° | 1.1 mm | 6 | |
| 27 Jan. | Moderate rain at times | 28° /24° | 8.3 mm | 6 | |
| 28 Jan. | Patchy rain possible | 29° /25° | 2.3 mm | 6 | |
| 29 Jan. | Cloudy | 29° /26° | 0.6 mm | 6 | |
| 30 Jan. | Patchy rain possible | 29° /26° | 1 mm | 6 | |
| 31 Jan. | Patchy rain possible | 28° /26° | 0.1 mm | 6 | |
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Important Notice
Our weather forecast for Guam Island in January 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 January - FAQ
What are the expected maximum and minimum temperatures in Guam Island during January?
During January, 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 January?
Moderate rainfall is anticipated in Guam Island during January, with a total of 68.3 mm spread over approximately 22 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Guam Island during January?
The average wind speed in Guam Island during January is 28 km/h, suggesting breezy to windy conditions, depending on your activities.
January rainfall patterns in Guam Island
Explore the daily rainfall trends and prepare for Guam Islands January weather 💧
UV exposure in Guam Island during January
Stay informed about UV levels for safe outdoor activities throughout the month of January ☀️
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