When to go · Guam
Guam in September
Mixed month. Heavy showers and typhoon risk; low prices outside Chuseok.
Key facts
- Verdict
- Mixed
- Crowds
- Low
- Guam
- Prices
- Low
- Guam
Verdict
Heavy showers and typhoon risk; low prices outside Chuseok.
Is another month better than September?
September is rated mixed. These months rate higher:
Weather in September
- Guam · Tumon, Hagåtña, the south and the north plateaustorm or typhoon risk
Warm all year (26–31 °C (79–88 °F)). Dry trade-wind season January–May; rainy season July–November, when most typhoons pass. Guam lies in the zone where tropical storms form, so a storm is possible in any month.Warm all year (79–88 °F (26–31 °C)). Dry trade-wind season January–May; rainy season July–November, when most typhoons pass. Guam lies in the zone where tropical storms form, so a storm is possible in any month.
- Tumon31 °C (88 °F) / 25 °C (77 °F), 23 rain days88 °F (31 °C) / 77 °F (25 °C), 23 rain days
- Dededo32 °C (90 °F) / 26 °C (79 °F), 7 rain days90 °F (32 °C) / 79 °F (26 °C), 7 rain days
- Hagåtña31 °C (88 °F) / 25 °C (77 °F), 6 rain days88 °F (31 °C) / 77 °F (25 °C), 6 rain days
- Mangilao31 °C (88 °F) / 25 °C (77 °F), 22 rain days88 °F (31 °C) / 77 °F (25 °C), 22 rain days
- Talofofo31 °C (88 °F) / 25 °C (77 °F), 18 rain days88 °F (31 °C) / 77 °F (25 °C), 18 rain days
- Tamuning32 °C (90 °F) / 27 °C (81 °F), 7 rain days90 °F (32 °C) / 81 °F (27 °C), 7 rain days
Festivals and holidays
Dates as our data lists them. Moving holidays (lunar and Islamic calendars, Easter) shift every year: check the date for your year before you build a trip on it.
Chuseok (Korea)
Sep–Oct (lunar)
Short surge of Korean visitors; Tumon hotels fill.
Village fiestas
Weekends all year
Each village honours its patron saint with Mass, procession and open-house food; visitors are often welcomed.
Typhoon season check
Jul–Nov · Tumon
Storms can close beaches, roads and flights.
Crowds and prices
- Crowds · Guam
- Low
- Prices · Guam
- Low
Compare two months
Weather, crowds and prices for any two months in Guam, side by side.
Verdict
Sep: Mixed
Jan: Great (better)
Crowds
Sep: Low
Jan: High
Prices
Sep: Low
Jan: High
Festivals listed
Sep: 3
Jan: 4
September: Heavy showers and typhoon risk; low prices outside Chuseok.
January: Dry and breezy; Japanese and Korean winter holidays keep Tumon busy.
Guam: figures are long-term averages from this guide, not a forecast.
What to pack
- A rain jacket or umbrella and shoes that dry fast
- A spare day in the plan: storms can cancel flights and ferries
Where to go in September
Better another month
Guam
Warm all year (26–31 °C (79–88 °F)). Dry trade-wind season January–May; rainy season July–November, when most typhoons pass. Guam lies in the zone where tropical storms form, so a storm is possible in any month.Warm all year (79–88 °F (26–31 °C)). Dry trade-wind season January–May; rainy season July–November, when most typhoons pass. Guam lies in the zone where tropical storms form, so a storm is possible in any month.