FNMY50 PGUM 191627 FWFGUM Fire Weather Planning Forecast for Guam National Weather Service Tiyan GU 227 AM ChST Wed May 20 2026 .Discussion... 0.29 inches of rain fell at Guam International Airport yesterday, which allowed the KBDI to rise to 281. This remains in the low category for fire danger. Breezy and dry weather is in store for the next couple of days, likely allowing the KBDI to continue to increase. GUZ001-201630- Guam- 227 AM ChST Wed May 20 2026 Today Tonight Thu Cloud Cover Pcldy Pcldy Pcldy Precip Type Showers Showers Showers Chance Rain (%) 20 20 20 Temp 87 78 87 RH % 71 97 72 20FtWnd-Val/AM(mph) E 12 E 12 20FtWnd-Rdg/PM(mph) E 13 E 12 E 12 Mixing Hgt(ft-msl) 6325 225 6383 Transport Wnd (mph) E 24 E 12 E 23 $$ .Forecast for Days 3 Through 7... .THURSDAY NIGHT...Mostly cloudy with scattered showers. Lows in the upper 70s. East winds 10 to 15 mph. .FRIDAY...Partly sunny with scattered showers. Highs in the upper 80s. East winds 10 to 15 mph. .FRIDAY NIGHT...Mostly cloudy with chance of showers. Lows in the upper 70s. East winds 10 to 15 mph. .SATURDAY...Partly sunny with chance of showers. Highs in the mid 80s. East winds 10 to 15 mph. .SATURDAY NIGHT...Mostly cloudy with chance of showers and a slight chance of thunderstorms. Lows in the upper 70s. East winds 5 to 15 mph. .SUNDAY...Partly sunny with chance of showers and a slight chance of thunderstorms. Highs in the mid 80s. East winds 5 to 10 mph. .SUNDAY NIGHT...Mostly cloudy with chance of showers and a slight chance of thunderstorms. Lows in the lower 80s. East winds 5 to 10 mph. .MONDAY...Mostly cloudy with chance of showers and a slight chance of thunderstorms. Highs in the lower 80s. East winds 10 to 15 mph. .MONDAY NIGHT...Mostly cloudy with chance of showers and a slight chance of thunderstorms. Lows in the lower 80s. East winds 5 to 15 mph. .TUESDAY...Mostly cloudy with chance of showers and a slight chance of thunderstorms. Highs in the mid 80s. Southeast winds 10 to 15 mph. $$