


Zone Forecast Product
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
319 FPMY50 PGUM 010639 AAA ZFPGUM Zone Forecast for Guam and the Northern Marianas...UPDATED National Weather Service Tiyan GU 439 PM ChST Mon Sep 1 2025 GUZ001-MPZ001>003-012015- Guam-Rota-Tinian-Saipan- 439 PM ChST Mon Sep 1 2025 Updated to increase the chance of showers to 50 percent for tonight. .REST OF TONIGHT...Mostly cloudy with scattered showers and isolated thunderstorms. Light and variable winds becoming northeast 10 to 15 mph. Lows around 79. Chance of showers 50 percent. .TUESDAY...Mostly cloudy with scattered showers and isolated thunderstorms. East winds 10 to 15 mph. Highs around 87. Chance of showers 40 percent. .TUESDAY NIGHT...Mostly cloudy with scattered showers and isolated thunderstorms. Southeast winds 10 to 15 mph. Lows around 77. Chance of showers 50 percent. .WEDNESDAY...Partly sunny with scattered showers and isolated thunderstorms. Southeast winds 10 to 15 mph. Highs around 86. Chance of showers 30 percent. .WEDNESDAY NIGHT AND THURSDAY...Mostly cloudy. Isolated showers. East winds around 10 mph. Lows around 79. Highs around 87. Chance of showers 20 percent. .THURSDAY NIGHT THROUGH MONDAY...Mostly cloudy with a 20 percent chance of showers. Lows in the upper 70s. Highs in the upper 80s. $$