Guam weather averages for holidays in 2017/2018

Check Guam weather averages before you book your next holiday in 2017/2018. Today's maximum temperature in Guam is expected to be 32°C, while the average maximum temperature in September is 31°C. The holiday weather guide shown below is for Agana.

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Guam weather averages

Check Guam weather averages before you book your next holiday. The warmest months in Guam are April, May, June, July, August, September, October and November with an average maximum temperature of 31°C. The sunniest months are March, April, May and June with on average 7 hours of bright sunshine per day. The month with the least number of days with some rain is June with 17 days. The sea is at its warmest in Guam in June, July, August, September, October and November with an average sea temperature of 29°C. The Guam weather averages shown below are for Agana.

Maximum daytime temperature (°C)

Hours of sunshine (daily)

  • Jan
  • Feb
  • Mar
  • Apr
  • May
  • Jun
  • Jul
  • Aug
  • Sep
  • Oct
  • Nov
  • Dec

Days with some rainfall

Sea temperature (°C)

More weather parameters

Metric (°C / mm)  |  Imperial (°F / inches)

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Guam weather today

Here is the weather in Guam today, Monday 25th September 2017. Expect isolated thunderstorms in Guam with a maximum temperature of 32°C, high levels of heat & humidity and 6 hours of bright sunshine. There are 5-10 mm of rainfall expected with 66% chance of some rain and a moderate breeze of 28 kph from the east. The weather forecast shown below is for Agana.

  • 32
    °C maximum temperature
  • 26
    °C minimum temperature
  • isolated thunderstorms
  • 6
    hours of sunshine
  • 66
    % chance of some rain
  • <10
    mm of rainfall expected
  • H
    high heat & humidity
  • 28
    kph wind from E

5-day weather forecast

Metric (°C / mm)  |  Imperial (°F / inches)

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Tropical cyclone risk: Guam typhoon season

% of month affected by tropical cyclones
1%
<1%
<1%
1%
2%
2%
5%
7%
8%
8%
5%
2%
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

The Guam tropical cyclone risk chart above shows the typhoon season for Agana, Guam.

More about tropical cyclones

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Guam holiday weather averages by month

Check Guam holiday weather averages for a particular month by selecting from the list below. Monthly weather guides include figures for temperature, rainfall, sunshine hours and sea temperature plus daily sunrise & sunset times.

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Compare Guam weather with the USA

Below the Guam weather chart shows maximum daytime temperature for Guam (Agana) and the USA (Washington). For more weather parameters or to change the destinations shown visit the comparison weather tool.

Maximum daytime temperature (°C)

Guam (Agana)
USA (Washington)
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Metric (°C / mm)  |  Imperial (°F / inches)

Compare more Guam weather >>

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