


Zone Forecast Product
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
090 FPMY50 PGUM 141718 ZFPGUM Zone Forecast for Guam and the Northern Marianas National Weather Service Tiyan GU 318 AM ChST Tue Jul 15 2025 GUZ001-MPZ001>003-151130- Guam-Rota-Tinian-Saipan- 318 AM ChST Tue Jul 15 2025 .TODAY...Partly sunny with isolated showers. Southeast winds 10 to 15 mph. Highs around 87. Chance of showers 20 percent. .TONIGHT...Mostly cloudy with scattered showers. Southeast winds 5 to 15 mph. Lows around 79. Chance of showers 30 percent. .WEDNESDAY AND WEDNESDAY NIGHT...Mostly cloudy. Scattered showers and isolated thunderstorms. East winds 5 to 15 mph. Highs around 87. Lows around 79. Chance of showers 30 percent. .THURSDAY...Partly sunny with isolated showers and thunderstorms. East winds 15 to 20 mph. Highs around 87. Chance of showers 20 percent. .THURSDAY NIGHT THROUGH 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 MONDAY...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. $$