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Voykit

When to go · Tumon

Tumon in May

Good month. Dry season ends; hot.

Key facts

Verdict
Good
Temperature
31°C (88°F) / 25°C (77°F)
average high / low
Rain days
14
Crowds
High
Guam overall
Prices
High
Guam overall

Verdict

GoodVoykit month rating for Tumon

Dry season ends; hot.

All twelve months in one grid — weather, crowds and prices, with gaps left as unknown.

Is another month better than May?

May is rated good. These months rate higher:

Weather in May

Long-term averages
  • TumonHighs around 31 °C (88 °F), lows around 25 °C (77 °F), rain on about 14 days
  • Guam, Guam · Tumon, Hagåtña, the south and the north plateauhot

    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.

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.

Compare two months

Weather, crowds and prices for any two months in Tumon, side by side.

  • Verdict

    May: Good

    Jan: Great (better)

  • Daytime high

    May: 31 °C (88 °F)

    Jan: 30 °C (86 °F)

  • Night low

    May: 25 °C (77 °F)

    Jan: 24 °C (75 °F)

  • Rain days

    May: 14 (better)

    Jan: 15

  • Crowds

    May: High

    Jan: High

  • Prices

    May: High

    Jan: High

  • Festivals listed

    May: 1

    Jan: 3

May: Dry season ends; hot.

January: Dry season; comfortable and busy.

Tumon: figures are long-term averages from this guide, not a forecast.

What to pack

  • Light, breathable clothes, a sun hat and sunscreen
  • A rain jacket or umbrella and shoes that dry fast

Build the full packing list for your trip →

Across Guam in May →