


Zone Forecast Product
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
477 FPMY50 PGUM 091701 ZFPGUM Zone Forecast for Guam and the Northern Marianas National Weather Service Tiyan GU 301 AM ChST Fri Oct 10 2025 GUZ001-MPZ001>003-100700- Guam-Rota-Tinian-Saipan- 301 AM ChST Fri Oct 10 2025 .TODAY...Partly sunny with scattered showers and isolated thunderstorms. East winds around 10 mph in the morning becoming light. Highs around 86. Chance of showers 30 percent. .TONIGHT AND SATURDAY...Partly cloudy with isolated showers and thunderstorms. Light and variable winds. Lows around 77. Highs around 88. Chance of showers 20 percent. .SATURDAY NIGHT AND SUNDAY...Partly cloudy with isolated showers. East winds 10 to 15 mph. Lows around 77. Highs around 88. Chance of showers 20 percent. .SUNDAY NIGHT AND COLUMBUS DAY...Partly cloudy with a 20 percent chance of showers. Lows in the upper 70s. Highs in the upper 80s. .MONDAY NIGHT...Mostly cloudy with a 20 percent chance of showers. Lows in the upper 70s. .TUESDAY THROUGH WEDNESDAY NIGHT...Mostly cloudy with a 30 percent chance of showers and a slight chance of thunderstorms. Highs in the upper 80s. Lows in the upper 70s. .THURSDAY...Partly sunny with a 20 percent chance of showers. Highs in the upper 80s. $$