840
FNMY50 PGUM 171635
FWFGUM

Fire Weather Planning Forecast for Guam
National Weather Service Tiyan GU
235 AM ChST Mon May 18 2026

.Discussion...
No rain fell at Guam International Airport yesterday, which
allowed the KBDI to rise to 250. 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.

GUZ001-181645-
Guam-
235 AM ChST Mon May 18 2026

                      Today        Tonight      Tue

Cloud Cover           Mcldy        Mcldy        Mcldy
Precip Type           Showers      Showers      Showers
Chance Rain (%)       20           40           20
Temp                  87           77           87
RH %                  72           99           73
20FtWnd-Val/AM(mph)   E 12                      E 11
20FtWnd-Rdg/PM(mph)   E 12         E 11         E 11
Mixing Hgt(ft-msl)    6435         190          6312
Transport Wnd (mph)   E 23         E  9         E 23

$$


.Forecast for Days 3 Through 7...

.TUESDAY NIGHT...Mostly cloudy with isolated showers. Lows in the
upper 70s. East winds 10 to 15 mph.
.WEDNESDAY...Mostly sunny with isolated showers. Highs in the
upper 80s. East winds 10 to 15 mph.
.WEDNESDAY NIGHT...Mostly cloudy with a slight chance of showers.
Lows in the upper 70s. East winds 10 to 15 mph.
.THURSDAY...Partly sunny with a slight chance of showers. Highs
in the upper 80s. East winds 10 to 15 mph.
.THURSDAY NIGHT...Partly cloudy with a slight chance of showers.
Lows in the upper 70s. East winds 10 to 15 mph.
.FRIDAY...Mostly sunny with a slight chance of showers. Highs in
the upper 80s. East winds 10 to 15 mph.
.FRIDAY NIGHT...Partly cloudy with a slight 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
10 to 15 mph.
.SUNDAY...Partly sunny with a slight chance of showers and
thunderstorms. Highs in the mid 80s. East winds 10 to 15 mph.


$$