Guam
Guam in September
Where it is warm, dry and good for swimming in Guam in September — compared across the country’s main destinations.
Quick answers
- Where is it warmest in Guam in September?
- Tamuning-Tumon-Harmon Village is the warmest of the 16 destinations compared, with highs of 30°C (87°F) in September; Yigo Village is the coolest at 30°C (85°F).
- Can you swim in the sea in Guam in September?
- Yes, in places: the warmest water is at Talofofo Village (29°C (85°F)), and 11 of the coastal destinations have a sea of 21 °C or more.
Warmest
30°
Tamuning-Tumon-Harmon Village
Coolest
30°
Yigo Village
Driest
315 mm
Talofofo Village
Warmest sea
29°
Talofofo Village
Tamuning-Tumon-Harmon Village is the warm end of Guam in September (30°C (87°F)); Yigo Village the cool end (30°C (85°F)). On average it is about as warm as August. Rain is frequent in most destinations. Best bets this month: Hagåtña, Tamuning-Tumon-Harmon Village, and Tamuning.
Weather in September by city
| Place | Day | Night | Rain | Sea | Score |
|---|---|---|---|---|---|
| Hagåtña | 30° | 24° | 317 mm | — | 64 |
| Tamuning-Tumon-Harmon Village | 30° | 24° | 319 mm | — | 64 |
| Tamuning | 30° | 24° | 319 mm | — | 64 |
| Talofofo Village | 30° | 24° | 315 mm | 29° | 64 |
| Dededo Village | 30° | 24° | 320 mm | 29° | 64 |
| Yigo Village | 30° | 24° | 320 mm | 29° | 64 |
| Mangilao Village | 30° | 24° | 316 mm | 29° | 64 |
| Barrigada | 30° | 24° | 318 mm | 29° | 64 |
| Santa Rita | 30° | 24° | 316 mm | 29° | 64 |
| Mongmong-Toto-Maite Village | 30° | 24° | 317 mm | 29° | 64 |
| Chalan Pago-Ordot Village | 30° | 24° | 316 mm | 29° | 64 |
| Yona Village | 30° | 24° | 315 mm | 29° | 64 |
| Apotgan | 30° | 24° | 319 mm | — | 64 |
| Agana Heights Village | 30° | 24° | 317 mm | — | 64 |
| Adacao | 30° | 24° | 318 mm | 29° | 64 |
| Agat Village | 30° | 24° | 316 mm | 29° | 64 |
Frequently asked questions
What is the weather like in Guam in September?
Average daytime highs range from 30° in Yigo Village to 30° in Tamuning-Tumon-Harmon Village.
Can you swim in Guam in September?
Yes — the sea is warmest around Talofofo Village at about 29°.