826 FPMY50 PGUM 051737 ZFPGUM Zone Forecast for Guam and the Northern Marianas National Weather Service Tiyan GU 337 AM ChST Sat Jun 6 2026 GUZ001-MPZ001>003-060830- Guam-Rota-Tinian-Saipan- 337 AM ChST Sat Jun 6 2026 .TODAY...Mostly sunny in the morning then becoming partly cloudy. Isolated showers. East winds 10 to 15 mph. Highs around 87. Chance of showers 20 percent. .TONIGHT...Partly cloudy with isolated showers. East winds around 10 mph. Lows around 79. Chance of showers 20 percent. .SUNDAY THROUGH MONDAY...Partly cloudy with isolated showers. East winds 10 to 15 mph. Highs around 87. Lows around 79. Chance of showers 20 percent. .MONDAY NIGHT THROUGH FRIDAY...Partly cloudy with a 20 percent chance of showers. Lows in the upper 70s. Highs in the upper 80s. $$