372
FPMY50 PGUM 191747
ZFPGUM

Zone Forecast for Guam and the Northern Marianas
National Weather Service Tiyan GU
347 AM ChST Sun Sep 20 2026

GUZ001-MPZ001-200915-
Guam-Rota-
347 AM ChST Sun Sep 20 2026

.TODAY...Mostly cloudy with scattered showers and isolated
thunderstorms. Light and variable winds becoming southwest 5 to 10
mph in the afternoon. Highs around 87. Chance of showers 50 percent.
.TONIGHT...Mostly cloudy with scattered showers and isolated
thunderstorms. Locally heavy showers possible. Light and variable
winds. Lows around 77. Chance of showers 50 percent.
.MONDAY THROUGH TUESDAY...Mostly cloudy with scattered showers and
isolated thunderstorms. South winds 10 to 15 mph. Highs around 86.
Lows around 78. Chance of showers 50 percent.
.TUESDAY NIGHT THROUGH WEDNESDAY NIGHT...Mostly cloudy with a 50
percent chance of showers and a slight chance of thunderstorms. Lows
in the upper 70s. Highs in the mid 80s.
.THURSDAY THROUGH SATURDAY...Mostly cloudy with a 50 percent chance
of showers. Highs in the upper 80s. Lows in the upper 70s.

$$

MPZ002-003-200915-
Tinian-Saipan-
347 AM ChST Sun Sep 20 2026

.TODAY...Partly sunny with scattered showers and isolated
thunderstorms. Light and variable winds. Highs around 88. Chance of
showers 30 percent.
.TONIGHT...Mostly cloudy with scattered showers and isolated
thunderstorms. Locally heavy rainfall possible. Light and variable
winds becoming east around 10 mph after midnight. Lows around 76.
Chance of showers 50 percent.
.MONDAY...Partly sunny with scattered showers and isolated
thunderstorms. Southeast winds 10 to 15 mph. Highs around 87. Chance
of showers 40 percent.
.MONDAY NIGHT...Partly cloudy with scattered showers and isolated
thunderstorms. Southeast winds 10 to 15 mph. Lows around 80. Chance
of showers 30 percent.
.TUESDAY...Mostly cloudy with scattered showers and isolated
thunderstorms. Southeast winds 10 to 15 mph. Highs around 87. Chance
of showers 40 percent.
.TUESDAY NIGHT AND WEDNESDAY...Mostly cloudy. A 40 percent chance of
showers and a slight chance of thunderstorms. Lows around 80. Highs
in the upper 80s.
.WEDNESDAY NIGHT AND THURSDAY...Mostly cloudy. A 50 percent chance
of showers. Lows in the lower 80s. Highs in the mid 80s.
.THURSDAY NIGHT THROUGH SATURDAY...Mostly cloudy with a 40 percent
chance of showers. Lows in the lower 80s. Highs in the upper 80s.

$$