


Zone Forecast Product
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
101 FPMY50 PGUM 170540 ZFPGUM Zone Forecast for Guam and the Northern Marianas National Weather Service Tiyan GU 340 PM ChST Fri Oct 17 2025 GUZ001-MPZ001>003-172000- Guam-Rota-Tinian-Saipan- 340 PM ChST Fri Oct 17 2025 .TONIGHT...Mostly cloudy with scattered showers. East winds 10 to 15 mph. Lows around 78. Chance of showers 30 percent. .SATURDAY...Breezy. Mostly cloudy with scattered showers and isolated thunderstorms. East winds 15 to 25 mph. Highs near 87. Chance of showers 40 percent. .SATURDAY NIGHT AND SUNDAY...Partly cloudy with isolated showers. East winds 10 to 20 mph. Lows around 77. Highs near 87. Chance of showers 20 percent. .SUNDAY NIGHT AND MONDAY...Mostly cloudy. Scattered showers. East winds 10 to 15 mph. Lows around 77. Highs near 86. Chance of showers 40 percent. .MONDAY NIGHT THROUGH FRIDAY...Mostly cloudy with a 30 percent chance of showers and a slight chance of thunderstorms. Lows in the upper 70s. Highs in the upper 80s. $$