FPMY60 PGUM 182215 SFTGUM GUZ001-MPZ003-190700- Tabular State Forecast for Guam National Weather Service Tiyan GU 815 AM ChST Tue May 19 2026 ROWS INCLUDE... Daily predominant daytime weather 6AM-6PM Forecast temperatures...early morning low/daytime high Probability of precipitation nighttime 6PM-6AM/daytime 6AM-6PM - indicates temperatures below zero MM indicates missing data FCST FCST FCST FCST FCST FCST FCST Today Wed Thu Fri Sat Sun Mon May 19 May 20 May 21 May 22 May 23 May 24 May 25 ...GUAM... Tiyan Ptcldy Ptcldy Ptcldy Ptsunny Ptsunny Ptsunny Ptsunny /87 76/88 78/87 78/88 78/87 78/86 81/84 /20 20/20 20/20 20/20 20/30 30/30 30/30 ...NORTHERN MARIANA ISLANDS... Saipan Airport Ptsunny Ptcldy Ptcldy Ptcldy Ptcldy Ptsunny Ptsunny /87 77/88 76/87 76/88 76/88 76/86 80/84 /20 20/20 20/20 20/20 20/20 20/30 30/20 $$