


Zone Forecast Product
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
066 FPMY50 PGUM 031720 ZFPGUM Zone Forecast for Guam and the Northern Marianas National Weather Service Tiyan GU 320 AM ChST Mon Aug 4 2025 GUZ001-MPZ001>003-040900- Guam-Rota-Tinian-Saipan- 320 AM ChST Mon Aug 4 2025 .TODAY...Partly sunny with isolated showers. East winds 10 to 15 mph. Highs around 87. Chance of showers 20 percent. .TONIGHT...Mostly cloudy with isolated showers. Southeast winds 10 to 15 mph. Lows around 78. Chance of showers 20 percent. .TUESDAY AND TUESDAY NIGHT...Mostly cloudy. Scattered showers and isolated thunderstorms. Southeast winds around 10 mph. Highs around 85. Lows around 78. Chance of showers 30 percent. .WEDNESDAY...Partly sunny with scattered showers and isolated thunderstorms. South winds 10 to 15 mph. Highs around 86. Chance of showers 30 percent. .WEDNESDAY NIGHT...Mostly cloudy with a 30 percent chance of showers and a slight chance of thunderstorms. Lows in the upper 70s. .THURSDAY...Partly sunny with a 20 percent chance of showers and thunderstorms. Highs in the mid 80s. .THURSDAY NIGHT AND FRIDAY...Mostly cloudy. A 20 percent chance of showers and thunderstorms. Lows in the upper 70s. Highs in the upper 80s. .FRIDAY NIGHT AND SATURDAY...Partly cloudy with a 20 percent chance of showers. Lows in the upper 70s. Highs in the mid 80s. .SATURDAY NIGHT...Mostly cloudy with a 20 percent chance of showers. Lows in the upper 70s. .SUNDAY...Partly sunny with a chance of showers and a slight chance of thunderstorms. Highs in the mid 80s. Chance of showers 30 percent. $$