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Guam

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Travel Info
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Guam Weather and climate

Data source:Meteostat
Update date:2025-10

Guam year round climate
  • Spring (March–May): Average 79–82°F. The climate is dry and warm with very low rainfall and abundant sunshine, making it one of the most comfortable seasons. Common activities: Beach activities, snorkeling, diving, exploring island scenery. Recommended attire: Light, breathable short-sleeved shirts, shorts, swimwear, sun protection, sun hat.
  • Summer (June–August): Average 81–83°F. Temperatures reach their peak, and it is generally hot. Rainfall slightly increases but remains very low, humidity is higher, and the sun is intense. Common activities: Various water sports, beach volleyball, night market experiences, outdoor dining. Recommended attire: Extremely light, breathable cotton and linen clothing, short-sleeved shirts, shorts, swimwear, strong sunscreen.
  • Autumn (September–November): Average 80–82°F. Temperatures remain hot. September is the month with relatively higher rainfall, but overall figures are still very low. Humidity is high, and occasional short showers may occur. Common activities: Diving, golf, shopping, visiting cultural attractions. Recommended attire: Light, breathable clothing, light long-sleeved shirts (for indoor air conditioning), sandals, simple rain gear.
  • Winter (December–February): Average 78–81°F. Temperatures are slightly milder. This is the period with the lowest annual rainfall, and the weather is extremely dry and comfortable. Sunshine is abundant, making it the most popular tourist season. Common activities: Relaxing on the beach, exploring historical sites, participating in festive events, seasonal whale watching. Recommended attire: Short-sleeved shirts, shorts, light dresses, light jacket (for mornings and evenings), sun protection.
Guam climatological average

Annual average temperature: approx. 81.3°F / Annual rainfall: approx. 93 mm / Summer humidity: 70-85% / Rainiest month: September

Guam monthly average temperature and precipitation
Month
Air temperature (°F)
Precipitation (mm)
January
80.1°F
1.8
February
79°F
1.6
March
79.9°F
1.8
April
81.1°F
2.8
May
82.2°F
3.2
June
82.9°F
4.2
July
82°F
11.2
August
82.2°F
11.4
September
81.9°F
24.1
October
81°F
19
November
81.9°F
9
December
82°F
3.6
Guam weather for the next seven days
11/13
Thursday
Patchy rain nearby
83.7°F/81.1°F
11/14
Friday
Patchy rain nearby
84.3°F/80.6°F
11/15
Saturday
Patchy rain nearby
84.2°F/80.9°F
11/16
Sunday
Patchy rain nearby
84.1°F/81.7°F
11/17
Monday
Patchy rain nearby
84.2°F/81.6°F
11/18
Tuesday
Patchy rain nearby
84.2°F/81.3°F
11/19
Wednesday
Patchy rain nearby
83.7°F/80.5°F