


Zone Forecast Product
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
146 FPMY50 PGUM 170528 ZFPGUM Zone Forecast for Guam and the Northern Marianas National Weather Service Tiyan GU 328 PM ChST Thu Jul 17 2025 GUZ001-MPZ001>003-172100- Guam-Rota-Tinian-Saipan- 328 PM ChST Thu Jul 17 2025 .TONIGHT...Mostly cloudy with isolated showers becoming scattered showers by midnight. Isolated thunderstorms. East winds 10 to 15 mph. Lows around 79. Chance of showers 40 percent. .FRIDAY...Partly sunny with scattered showers and thunderstorms. East winds 10 to 15 mph. Highs around 86. Chance of showers 30 percent. .FRIDAY NIGHT...Partly cloudy with isolated showers and thunderstorms. East winds 10 to 15 mph. Lows around 78. Chance of showers 20 percent. .SATURDAY THROUGH SUNDAY...Mostly cloudy with scattered showers and isolated thunderstorms. Southeast winds 10 to 15 mph. Highs around 86. Lows around 78. Chance of showers 50 percent. .SUNDAY NIGHT...Mostly cloudy with a 30 percent chance of showers and a slight chance of thunderstorms. Lows in the upper 70s. .MONDAY...Partly sunny with a 20 percent chance of showers and thunderstorms. Highs in the mid 80s. .MONDAY NIGHT...Mostly cloudy with a 30 percent chance of showers and a slight chance of thunderstorms. Lows in the upper 70s. .TUESDAY THROUGH WEDNESDAY...Mostly cloudy with a 20 percent chance of showers and thunderstorms. Highs in the mid 80s. Lows in the upper 70s. .WEDNESDAY NIGHT AND THURSDAY...Mostly cloudy with a 30 percent chance of showers and a slight chance of thunderstorms. Lows in the upper 70s. Highs in the mid 80s. $$