


Zone Forecast Product
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
544 FPMY50 PGUM 130546 ZFPGUM Zone Forecast for Guam and the Northern Marianas National Weather Service Tiyan GU 346 PM ChST Sun Jul 13 2025 GUZ001-MPZ001>003-132100- Guam-Rota-Tinian-Saipan- 346 PM ChST Sun Jul 13 2025 .TONIGHT...Mostly cloudy with isolated showers. Southeast winds 10 to 15 mph. Lows around 78. Chance of showers 20 percent. .MONDAY AND MONDAY NIGHT...Partly cloudy with isolated showers. Southeast winds 10 to 15 mph. Highs around 87. LOws around 77. Chance of showers 20 percent. .TUESDAY AND TUESDAY NIGHT...Mostly cloudy. Isolated showers. Southeast winds 15 to 20 mph. Highs around 87. Lows around 78. Chance of showers 20 percent. .WEDNESDAY...Partly sunny with scattered showers. Southeast winds 10 to 15 mph. Highs around 86. Chance of showers 30 percent. .WEDNESDAY NIGHT THROUGH SUNDAY...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. $$