


Zone Forecast Product
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
252 FPMY50 PGUM 100500 ZFPGUM Zone Forecast for Guam and the Northern Marianas National Weather Service Tiyan GU 300 PM ChST Wed Sep 10 2025 GUZ001-MPZ001>003-102030- Guam-Rota-Tinian-Saipan- 300 PM ChST Wed Sep 10 2025 .TONIGHT...Partly cloudy with isolated showers and thunderstorms. East winds 10 to 15 mph. Lows around 79. Chance of showers 20 percent. .THURSDAY...Partly sunny with isolated showers and thunderstorms. East winds 10 to 15 mph. Highs around 87. Chance of showers 20 percent. .THURSDAY NIGHT...Partly cloudy with isolated showers and thunderstorms. Light and variable winds. Lows around 79. Chance of showers 20 percent. .FRIDAY THROUGH SATURDAY...Mostly cloudy with isolated showers and thunderstorms. Southeast winds around 10 mph. Highs around 87. Lows around 79. Chance of showers 20 percent. .SATURDAY NIGHT...Mostly cloudy with a 20 percent chance of showers. Lows in the upper 70s. .SUNDAY...Partly cloudy with a 20 percent chance of showers. Highs in the upper 80s. .SUNDAY NIGHT AND MONDAY...Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows in the upper 70s. Highs in the upper 80s. .MONDAY NIGHT...Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows in the upper 70s. .TUESDAY...Partly cloudy with a 20 percent chance of showers and thunderstorms. Highs in the upper 80s. .TUESDAY NIGHT...Mostly cloudy with a 40 percent chance of showers and a slight chance of thunderstorms. Lows in the upper 70s. .WEDNESDAY...Partly sunny with a 20 percent chance of showers and thunderstorms. Highs in the upper 80s. $$