


Zone Forecast Product
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
419 FPMY50 PGUM 121759 ZFPGUM Zone Forecast for Guam and the Northern Marianas National Weather Service Tiyan GU 359 AM ChST Sun Jul 13 2025 GUZ001-MPZ001>003-130815- Guam-Rota-Tinian-Saipan- 359 AM ChST Sun Jul 13 2025 .TODAY...Partly sunny. Scattered showers and isolated thunderstorms. Southeast winds 10 to 15 mph. Highs near 86. Chance of showers 30 percent. .TONIGHT...Mostly cloudy with isolated showers and thunderstorms. Southeast winds 10 to 15 mph. Lows around 79. Chance of showers 20 percent. .MONDAY...Partly sunny with isolated showers and thunderstorms. Southeast winds 10 to 15 mph. Highs near 86. Chance of showers 20 percent. .MONDAY NIGHT...Mostly cloudy with scattered showers and isolated thunderstorms. Southeast winds 10 to 15 mph. Lows around 79. Chance of showers 30 percent. .TUESDAY...Partly sunny with scattered showers. Southeast winds 10 to 15 mph. Highs near 86. Chance of showers 30 percent. .TUESDAY NIGHT AND WEDNESDAY...Mostly cloudy. A 20 percent chance of showers and thunderstorms. Lows in the upper 70s. Highs in the mid 80s. .WEDNESDAY NIGHT THROUGH SATURDAY...Mostly cloudy with a chance of showers and a slight chance of thunderstorms. Lows in the upper 70s. Highs in the mid 80s. Chance of showers 40 percent. $$