Zone Forecast Product
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
034 FPMY50 PGUM 290557 ZFPGUM Zone Forecast for Guam and the Northern Marianas National Weather Service Tiyan GU 357 PM ChST Tue Sep 29 2026 GUZ001-MPZ001>003-292000- Guam-Rota-Tinian-Saipan- 357 PM ChST Tue Sep 29 2026 .TONIGHT...Mostly cloudy with isolated showers. Northwest winds 10 to 15 mph. Lows around 78. Chance of showers 20 percent. .WEDNESDAY AND WEDNESDAY NIGHT...Mostly cloudy with scattered showers and isolated thunderstorms. West to northwest winds 10 to 15 mph. Highs near 88. Lows around 78. Chance of showers 40 percent. .THURSDAY AND THURSDAY NIGHT...Breezy. Mostly cloudy with scattered showers and isolated thunderstorms. West winds 15 to 25 mph. Highs near 88. Lows around 78. Chance of showers 40 percent. .FRIDAY...Breezy. Cloudy. Numerous showers and isolated thunderstorms. West winds 20 to 25 mph. Highs near 86. Chance of showers 60 percent. .FRIDAY NIGHT AND SATURDAY...Breezy. Cloudy with showers likely and a slight chance of thunderstorms. Lows in the upper 70s. Highs in the mid 80s. Chance of showers 60 percent. .SATURDAY NIGHT THROUGH TUESDAY...Breezy. Mostly cloudy with a 50 percent chance of showers and a slight chance of thunderstorms. Lows in the upper 70s. Highs in the upper 80s. $$