


Zone Forecast Product
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
635 FPMY50 PGUM 301738 ZFPGUM Zone Forecast for Guam and the Northern Marianas National Weather Service Tiyan GU 338 AM ChST Sun Aug 31 2025 GUZ001-MPZ001>003-310915- Guam-Rota-Tinian-Saipan- 338 AM ChST Sun Aug 31 2025 .TODAY...Mostly cloudy with scattered showers and isolated thunderstorms. South winds 10 to 15 mph. Highs near 87. Chance of showers 40 percent. .TONIGHT...Mostly cloudy with isolated showers. Southeast winds around 10 mph in the evening becoming light. Lows around 80. Chance of showers 20 percent. .LABOR DAY...Partly sunny with scattered showers. Northeast winds 10 to 15 mph. Highs near 87. Chance of showers 30 percent. .MONDAY NIGHT AND TUESDAY...Breezy. Mostly cloudy. Scattered showers and isolated thunderstorms. East winds 15 to 20 mph. Lows around 80. Highs near 87. Chance of showers 40 percent. .TUESDAY NIGHT AND WEDNESDAY...Mostly cloudy with a 40 percent chance of showers and a slight chance of thunderstorms. Lows around 78. Highs in the mid 80s. .WEDNESDAY NIGHT AND THURSDAY...Mostly cloudy. A 30 percent chance of showers. Lows around 78. Highs in the upper 80s. .THURSDAY NIGHT AND FRIDAY...Mostly cloudy. A 20 percent chance of showers. Lows around 78. Highs in the upper 80s. .FRIDAY NIGHT AND SATURDAY...Mostly cloudy. A 30 percent chance of showers. Lows around 78. Highs in the upper 80s. $$