


Zone Forecast Product
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
656 FPMY50 PGUM 160542 ZFPGUM Zone Forecast for Guam and the Northern Marianas National Weather Service Tiyan GU 342 PM ChST Wed Jul 16 2025 GUZ001-MPZ001>003-162045- Guam-Rota-Tinian-Saipan- 342 PM ChST Wed Jul 16 2025 .TONIGHT...Mostly cloudy with scattered showers and isolated thunderstorms. East winds 10 to 15 mph. Lows around 78. Chance of showers 30 percent. .THURSDAY...Partly cloudy with isolated showers and thunderstorms. East winds 10 to 15 mph. Highs around 87. Chance of showers 20 percent. .THURSDAY NIGHT...Mostly cloudy with scattered showers and isolated thunderstorms. East winds 10 to 15 mph. Lows around 77. Chance of showers 30 percent. .FRIDAY THROUGH SATURDAY...Mostly cloudy with scattered showers and isolated thunderstorms. East winds 10 to 15 mph. Highs around 86. Lows around 77. Chance of showers 40 percent. .SATURDAY NIGHT...Mostly cloudy with a 40 percent chance of showers and a slight chance of thunderstorms. Lows in the upper 70s. Highs in the mid 80s. .SUNDAY THROUGH WEDNESDAY...Mostly cloudy with a 30 percent chance of showers and a slight chance of thunderstorms. Highs in the mid 80s. Lows in the upper 70s. $$