Guam
August
Weather in Guam for August 2025
Your guide to Guam weather in August - trends and predictions
In general, the average temperature in Guam at the beginning of August is 29 °C. As the month progressed, temperatures tended to slightly increase, reaching an average of 29.1 °C by the end of August.
Guam experiences an exceptionally high level of rainfall in August, with more than 24 rainy days on average.
Is August a good time to visit Guam? check out the best time to travel to Guam page.
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0
Dry days
31
Rainy days
0
Snow days
28°/27°
Temperatures
22 km/h
Avg max wind
80 %
Avg humidity
Guam in August average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  30° | 2  28° | 3 29° | ||||
| 4 29° | 5 29° | 6 29° | 7 29° | 8 29° | 9 29° | 10 28° |
| 11 28° | 12 28° | 13 29° | 14 29° | 15 29° | 16 29° | 17 29° |
| 18  29° | 19 29° | 20 29° | 21 29° | 22 29° | 23 29° | 24 29° |
| 25 30° | 26 29° | 27 29° | 28 29° | 29 29° | 30 29° | 31  29° |
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Temperatures trend during August in Guam
See the weather trend as well as the moving average line
August weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Aug. | Moderate rain at times | 30° /27° | 4.1 mm | 7 | |
| 2 Aug. | Patchy rain possible | 28° /26° | 26 mm | 6 | |
| 3 Aug. | Moderate or heavy rain shower | 29° /26° | 6.2 mm | 6 | |
| 4 Aug. | Patchy rain possible | 29° /26° | 16.4 mm | 6 | |
| 5 Aug. | Moderate or heavy rain shower | 29° /26° | 7.7 mm | 6 | |
| 6 Aug. | Patchy rain possible | 29° /26° | 5.4 mm | 6 | |
| 7 Aug. | Patchy rain possible | 29° /26° | 4.5 mm | 7 | |
| 8 Aug. | Moderate or heavy rain shower | 29° /26° | 14.1 mm | 7 | |
| 9 Aug. | Moderate or heavy rain shower | 29° /26° | 24.8 mm | 6 | |
| 10 Aug. | Moderate or heavy rain shower | 28° /26° | 28.8 mm | 6 | |
| 11 Aug. | Moderate or heavy rain shower | 28° /26° | 30.7 mm | 6 | |
| 12 Aug. | Moderate or heavy rain shower | 28° /26° | 30.2 mm | 6 | |
| 13 Aug. | Moderate or heavy rain shower | 29° /26° | 29.3 mm | 7 | |
| 14 Aug. | Moderate or heavy rain shower | 29° /26° | 15.6 mm | 6 | |
| 15 Aug. | Patchy rain possible | 29° /26° | 7.1 mm | 6 | |
| 16 Aug. | Moderate or heavy rain shower | 29° /26° | 8.7 mm | 6 | |
| 17 Aug. | Moderate or heavy rain shower | 29° /25° | 4.6 mm | 6 | |
| 18 Aug. | Heavy rain at times | 29° /26° | 8.7 mm | 6 | |
| 19 Aug. | Moderate rain at times | 29° /27° | 12.4 mm | 6 | |
| 20 Aug. | Moderate or heavy rain shower | 29° /27° | 8.3 mm | 6 | |
| 21 Aug. | Moderate or heavy rain shower | 29° /26° | 9.5 mm | 6 | |
| 22 Aug. | Moderate or heavy rain shower | 29° /26° | 17.1 mm | 6 | |
| 23 Aug. | Moderate or heavy rain shower | 29° /27° | 8.1 mm | 6 | |
| 24 Aug. | Moderate rain at times | 29° /27° | 3.1 mm | 7 | |
| 25 Aug. | Moderate or heavy rain shower | 30° /27° | 11.2 mm | 6 | |
| 26 Aug. | Light rain shower | 29° /27° | 15.1 mm | 6 | |
| 27 Aug. | Moderate or heavy rain shower | 29° /27° | 26.7 mm | 6 | |
| 28 Aug. | Moderate or heavy rain shower | 29° /27° | 30.3 mm | 7 | |
| 29 Aug. | Moderate or heavy rain shower | 29° /27° | 21.7 mm | 7 | |
| 30 Aug. | Moderate or heavy rain shower | 29° /26° | 13.7 mm | 6 | |
| 31 Aug. | Torrential rain shower | 29° /26° | 31.6 mm | 6 | |
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Important Notice
Our weather forecast for Guam in August 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 forecast closer to your planned date for the most up-to-date weather information.
Guam in August - FAQ
What are the expected maximum and minimum temperatures in Guam during August?
During August, expect a variety of temperatures with highs around 28° and lows near 27°, suitable for diverse activities and preferences.
How much rainfall should be expected in Guam during August?
Significant rainfall exceeding 716.2 mm is expected in Guam during August, occurring over more than 31 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Guam during August?
The average wind speed in Guam during August is 22 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Guam in August?
As you prepare for your trip to Guam in August, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Guam, during August, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Lightweight Clothing: T-shirts, blouses, shorts, skirts
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- Sunglasses: For sun protection
- Sun Hats: Wide-brimmed hats for sun protection in warm weather
- Umbrellas/Raincoats: For rainy days
- Personal Items
- Sunscreen: High SPF for sunny destinations
- Lip Balm with SPF: To protect against chapped lips
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