FPMY50 PGUM 081732 ZFPMY Zone Forecast for the Mariana Islands National Weather Service Tiyan GU 332 AM ChST Tue Apr 9 2019 GUZ001>004-090800- Guam-Rota-Tinian-Saipan- 332 AM ChST Tue Apr 9 2019 .TODAY...Mostly sunny. Northeast winds 10 to 15 mph. Highs around 89. .TONIGHT THROUGH THURSDAY...Partly cloudy with a slight chance of light showers. East winds 5 to 10 mph. Lows around 77. Highs around 89. .THURSDAY NIGHT THROUGH MONDAY...Partly cloudy with a slight chance of light showers. Lows in the upper 70s. Highs in the upper 80s. $$