Guam in September: where is it warmest?
In September, Hagåtña averages 31 °C by day.
All destinations in September, warmest first
Long-term averages for the month: daytime high, sea, sunshine and rainy days.
| Place | Score | Air | Sea | Sun | Rainy days |
|---|---|---|---|---|---|
| Hagåtña | 31 | 31° | 30° | 5 h | 28 |
Guam in September: quick answers
Guam in September: where is it warmest?
The warmest places in September are Hagåtña (31 °C).
Guam in September: where is the sea warmest?
The sea is warmest at Hagåtña (30 °C).
Guam in September: where is the weather best?
No destination has really good holiday weather in September; the best scores are in Hagåtña.
Guam month by month
Guam: weather & best time to visit
Climate averages 1996–2025 (sunshine partly WMO station normals 1991–2020), not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences