138
FPMY50 PGUM 220513
ZFPGUM

Zone Forecast for Guam and the Northern Marianas
National Weather Service Tiyan GU
313 PM ChST Fri Aug 22 2025

GUZ001-MPZ001>003-222000-
Guam-Rota-Tinian-Saipan-
313 PM ChST Fri Aug 22 2025

.TONIGHT...Mostly cloudy with scattered showers and isolated
thunderstorms. East winds around 10 mph in the evening becoming
light. Lows around 77. Chance of showers 50 percent.
.SATURDAY...Partly sunny with scattered showers and isolated
thunderstorms. East winds 10 to 15 mph. Highs around 87. Chance of
showers 40 percent.
.SATURDAY NIGHT...Mostly cloudy with scattered showers and isolated
thunderstorms. East winds around 10 mph in the evening becoming
light. Lows around 77. Chance of showers 30 percent.
.SUNDAY THROUGH MONDAY...Mostly cloudy with scattered showers and
isolated thunderstorms. East winds 10 to 15 mph. Highs around 87.
Lows around 77. Chance of showers 30 percent.
.MONDAY NIGHT...Mostly cloudy with a 20 percent chance of showers
and thunderstorms. Lows in the upper 70s.
.TUESDAY THROUGH FRIDAY...Mostly cloudy with a chance of showers and
a slight chance of thunderstorms. Highs in the upper 80s. Lows in
the upper 70s. Chance of showers 30 percent.

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