When to go · Tumon
Tumon in May
Good month. Dry season ends; hot.
Key facts
- Verdict
- Good
- Temperature
- 31°C88°F / 25°C77°F
- average high / low
- Rain days
- 14
- Crowds
- High
- Guam overall
- Prices
- High
- Guam overall
Verdict
Dry season ends; hot.
Weather in May
- TumonHighs around 31 °C, lows around 25 °C, rain on about 14 daysHighs around 88 °F, lows around 77 °F, rain on about 14 days
- Guam, Guam · Tumon, Hagåtña, the south and the north plateauhot
Warm all year (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.Warm all year (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.
Dry season season
Calmest sea, best snorkel visibility, lowest rain.
Watch: Peak crowds and high prices in Jan–Feb.
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.
Golden Week (Japan) big impact
Late Apr – early May · Guam
Tumon's busiest week for Japanese visitors; book early.
Crowds and prices
- Crowds · Guam overall
- High
- Prices · Guam overall
- High
Guam overall: Hottest and still mostly dry; Golden Week early in the month. Mawar hit in May 2023, so check forecasts.
High-price month: see what to book ahead.
What to pack
- Light, breathable clothes, a sun hat and sunscreen
- A rain jacket or umbrella and shoes that dry fast