FPMY60 PGUM 191640 SFTGUM GUZ001-MPZ003-200700- Tabular State Forecast for Guam National Weather Service Tiyan GU 240 AM ChST Wed May 20 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 Thu Fri Sat Sun Mon Tue May 20 May 21 May 22 May 23 May 24 May 25 May 26 ...GUAM... Tiyan Ptcldy Ptcldy Ptsunny Ptsunny Ptsunny Shwrs Shwrs /88 78/87 78/88 78/87 78/86 81/84 81/86 /20 20/20 30/30 30/30 30/30 50/50 40/50 ...NORTHERN MARIANA ISLANDS... Saipan Airport Ptcldy Ptcldy Ptsunny Ptsunny Ptsunny Shwrs Ptsunny /88 76/87 76/88 76/88 76/86 80/84 80/85 /20 20/20 30/30 30/30 30/40 50/50 40/30 $$