Guam weather, town by town
57 places, each with its own live forecast and radar, and where a station sits close enough, measured weather records.
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Measured at the NOAA stations serving these towns, daily records 1945 to 2026. Station extremes, not official state records.
Guam Weather Facts
Guam has 57 places on myweatherrock (57 census-designated places), each with its own live forecast, hourly timeline, ten day outlook and radar. The hottest day in the station records is 96°F at Guam International Airport on April 18, 1971. The coldest night is 56°F at Guam Wsmo on January 29, 1977. The wettest day brought 21.69 inches of rain at Mangilao on May 26, 2023. The biggest single-day snow measured 0 inches at Guam Wsmo on September 1, 1956. Those are station measurements from NOAA's daily records, 1945 to 2026, not official state records. By area the largest place is Anao, about 6 square miles.
About Guam weather
The map on the Now tab shows every Guam town's current temperature from our own server, one dot per town. Tap any dot, or type a town above, for that town's full forecast.
What the weather is usually like
Across the 56 Guam towns with station normals, the warmest month is May, when the day usually reaches 88°F, and the coldest is February, when the night usually falls to 74°F. July is the wettest, with rain on about 26 days. May afternoons run from about 86°F in Anao to 89°F in Afame. February nights run from about 72°F in Adacao to 75°F in Afame.
Means of the 1991 to 2020 station normals serving these towns, as published by NOAA; each town's page carries its own.
Where these numbers come from
- Current conditions and forecast: NOAA forecast grids decoded on our own server, corrected against the nearest reporting station and our own radar. Open-Meteo is consulted only as a fallback when our server is silent.
- Records: computed by myweatherrock from NOAA GHCN-Daily station records at the stations serving these towns. Measurements, not estimates.
- Warnings and alerts: the National Weather Service, passed through unchanged.
Guam weather records
Measured at the NOAA stations serving these towns, daily records 1945 to 2026. Station extremes, not official state records.
Common questions about Guam weather
- What is the hottest temperature recorded at a Guam station?
- 96°F at Guam International Airport on April 18, 1971, in the NOAA daily station records myweatherrock holds (1945 to 2026).
- What is the coldest temperature recorded at a Guam station?
- 56°F at Guam Wsmo on January 29, 1977.
- What is the most rain a Guam station has measured in one day?
- 21.69 inches at Mangilao on May 26, 2023.
- What is the biggest one-day snowfall at a Guam station?
- 0 inches at Guam Wsmo on September 1, 1956.
- How many Guam towns have a weather page here?
- 57: 57 census-designated places. Each page carries current conditions, the hourly timeline, the ten day outlook, radar, and where a station sits close enough, measured records.
- Where does the Guam forecast come from?
- NOAA forecast grids (the National Weather Service digital forecast, the National Blend of Models, HRRR and GFS) decoded on our own server, corrected against the nearest reporting station and our own radar. Open-Meteo is consulted only as a fallback when our server is silent.
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