519
FPMY50 PGUM 171731
ZFPGUM

Zone Forecast for Guam and the Northern Marianas
National Weather Service Tiyan GU
331 AM ChST Fri Jul 18 2025

GUZ001-MPZ001>003-180900-
Guam-Rota-Tinian-Saipan-
331 AM ChST Fri Jul 18 2025

.TODAY...Mostly cloudy with scattered showers becoming partly cloudy
with isolated showers in the afternoon. Isolated thunderstorms. East
winds 10 to 15 mph. Highs around 86. Chance of showers 40 percent.
.TONIGHT...Partly cloudy with isolated showers. Scattered showers
developing across Guam around midnight. Isolated thunderstorms.
Northeast winds 10 to 15 mph. Lows around 77. Chance of showers 20
percent for the CNMI; 30 percent for Guam.
.SATURDAY THROUGH SUNDAY...Mostly cloudy with scattered showers and
isolated thunderstorms. Southeast winds 10 to 15 mph. Highs around
86. Lows around 78. Chance of showers 50 percent.
.SUNDAY NIGHT...Mostly cloudy with a 30 percent chance of showers
and a slight chance of thunderstorms. Lows in the upper 70s.
.MONDAY...Partly sunny with a 20 percent chance of showers and
thunderstorms. Highs in the mid 80s.
.MONDAY NIGHT...Mostly cloudy with a 30 percent chance of showers
and a slight chance of thunderstorms. Lows in the upper 70s.
.TUESDAY THROUGH WEDNESDAY...Mostly cloudy with a 20 percent chance
of showers and thunderstorms. Highs in the mid 80s. Lows in the
upper 70s.
.WEDNESDAY NIGHT AND THURSDAY...Mostly cloudy with a 30 percent
chance of showers and a slight chance of thunderstorms. Lows in the
upper 70s. Highs in the mid 80s.

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