Best year time to visit Guam

General weather information about Guam

Average annual temperature is 14.8 °C

Absolute maximum temperature: 34.2 °C

Absolute minimum temperature: -11.4 °C

Number of sunny days: 168 days

Number of rainy days: 184 days

Number of snow days: 13 days

Look at detailed online map of Guam

* Weather data for Guam South Korea is based on climate observations for 2026 year

Guam air temperature forecast for each month

JanFebMarAprMayJunJulAugSepOctNovDec
Absolute maximum temperature (°C)16.213.724.826.229.633.432.134.230.323.926.219.3
Average daytime temperature (°C)6.69.117.019.423.428.329.030.927.521.314.08.5
Average temperature (°C)1.83.210.013.718.423.026.026.923.516.29.75.0
Average night temperature (°C)-2.5-1.34.88.814.119.123.623.520.211.95.51.4
Absolute minimum temperature (°C)-11.4-4.8-3.81.97.314.520.818.415.48.4-2.2-9.3

Guam monthly weather indicators

JanFebMarAprMayJunJulAugSepOctNovDec
Daylight maximum duration (h)10.011.012.013.014.014.014.013.012.011.010.09.0
Daylight mean duration (h)10.110.912.013.114.014.514.213.412.411.310.49.9
Daylight minimum duration (h)9.010.011.012.013.014.013.012.011.010.010.09.0
Sunshine mean duration (h)7.17.28.57.47.48.66.410.07.98.56.95.5
Precipitation (mm)25304587167165460213130166763
Sunny days191923131316247211912
Rainy days788171814292723101112
Snow days510000000007

Guam - weather forecast by months

Guam weather in januaryGuam weather in februaryGuam weather in marchGuam weather in aprilGuam weather in mayGuam weather in juneGuam weather in julyGuam weather in augustGuam weather in septemberGuam weather in octoberGuam weather in novemberGuam weather in december

Best time to visit Guam:

The best time to visit Guam during the most sunny months:

  • August — 10.0(h)

The largest precipitation sum in Guam is at

  • May — 167(mm)
  • June — 165(mm)
  • July — 460(mm)
  • August — 213(mm)

    • Weather forecast in the closest to Guam admin centers

    Weather forecast in the closest towns to Guam

    Explore Guam

    See also
    MapTrains schedule
    Plan your trip
    AccommodationExperiencesBlog

    Frequently asked questions

    When is the best time to visit Guam?
    The historical weather data above shows the warmest, sunniest and driest months to help you choose the best time to visit Guam.
    What is the weather like in Guam?
    See average temperature, rainfall and daylight hours for Guam by month in the table above.
    How many sunny days does Guam have?
    The monthly weather statistics above show sunshine and rainfall patterns for Guam throughout the year.