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Asan, Guam Weather Forecast
Asan, GU Weather Forecast Dated: 730 AM Mon Aug 31 2026 (Asan Time)
Expect a very warm period with more clouds than sun and frequent chances of rain over the next two weeks. generally humid conditions and no major pressure swings will dominate. A few thunderstorms possible.
Monday, August 31, 2026
Mid-Morning
83°F 28°C
Scattered Showers
Mid-Afternoon
84°F 29°C
Sunny
Early-Evening
83°F 28°C
Scattered Showers
Very warm with a mix of sun and clouds, steady humidity and steady pressure.
Tuesday, September 1, 2026
Mid-Morning
83°F 28°C
Sunny
Mid-Afternoon
84°F 29°C
Scattered Showers
Early-Evening
82°F 28°C
Scattered Showers
Very warm with a mix of sun and clouds, steady humidity and steady pressure. Isolated showers.
Wednesday, September 2, 2026
Mid-Morning
83°F 28°C
Sunny
Mid-Afternoon
84°F 29°C
Scattered Showers
Early-Evening
81°F 27°C
Light Showers
Very warm with a mix of sun and clouds, steady humidity and steady pressure. Isolated showers. Winds E at 10 mph 16 km/h.
Thursday, September 3, 2026
Mid-Morning
80°F 27°C
Light Showers
Mid-Afternoon
81°F 27°C
Light Showers
Early-Evening
81°F 27°C
Light Showers
Very warm with a mix of sun and clouds, steady humidity and steady pressure. Thunderstorms possible in the afternoon. Winds SW at 23 mph 38 km/h.
Friday, September 4, 2026
Mid-Morning
82°F 28°C
Scattered Showers
Mid-Afternoon
83°F 28°C
Scattered Showers
Early-Evening
82°F 28°C
Scattered Showers
Very warm with a mix of sun and clouds, steady humidity and steady pressure. A stray shower possible. Thunderstorms possible in the afternoon. Winds shifting from SW to WSW at 14 mph 23 km/h.
Saturday, September 5, 2026
Mid-Morning
82°F 28°C
Light Showers
Mid-Afternoon
83°F 28°C
Light Showers
Early-Evening
82°F 28°C
Scattered Showers
Very warm with a mix of sun and clouds, steady humidity and steady pressure. Thunderstorms possible in the afternoon. Winds WSW at 13 mph 20 km/h.
Sunday, September 6, 2026
Mid-Morning
81°F 27°C
Light Showers
Mid-Afternoon
82°F 28°C
Light Showers
Early-Evening
80°F 27°C
Light Showers
Very warm with a mix of sun and clouds, steady humidity and steady pressure. Thunderstorms possible in the afternoon. Winds SSW at 8 mph 13 km/h.
Monday, September 7, 2026
Mid-Morning
82°F 28°C
Overcast
Mid-Afternoon
81°F 27°C
Light Showers
Early-Evening
81°F 27°C
Light Showers
Very warm with a mix of sun and clouds, steady humidity and steady pressure. A stray shower or storm late in the day. Winds SSW at 10 mph 16 km/h.
Tuesday, September 8, 2026
Mid-Morning
82°F 28°C
Overcast
Mid-Afternoon
83°F 29°C
Scattered Showers
Early-Evening
82°F 28°C
Light Showers
Very warm with a mix of sun and clouds, steady humidity and steady pressure. Isolated showers. A stray shower or storm late in the day. Winds SSW at 12 mph 20 km/h.
Wednesday, September 9, 2026
Mid-Morning
83°F 28°C
Scattered Showers
Mid-Afternoon
83°F 29°C
Scattered Showers
Early-Evening
82°F 28°C
Overcast
Very warm with a mix of sun and clouds, steady humidity and steady pressure. A few spotty showers; otherwise dry. Winds SSW at 9 mph 14 km/h.
Thursday, September 10, 2026
Mid-Morning
82°F 28°C
Overcast
Mid-Afternoon
83°F 29°C
Overcast
Early-Evening
82°F 28°C
Overcast
Very warm with overcast skies, steady humidity and steady pressure. Winds shifting from SSW to W at 7 mph 11 km/h.
Friday, September 11, 2026
Mid-Morning
82°F 28°C
Overcast
Mid-Afternoon
84°F 29°C
Overcast
Early-Evening
83°F 28°C
Overcast
Very warm with overcast skies, steady humidity and steady pressure.
Saturday, September 12, 2026
Mid-Morning
82°F 28°C
Overcast
Mid-Afternoon
84°F 29°C
Overcast
Early-Evening
82°F 28°C
Scattered Showers
Very warm with overcast skies, steady humidity and steady pressure. Winds WSW at 12 mph 20 km/h.
Sunday, September 13, 2026
Mid-Morning
81°F 27°C
Scattered Showers
Mid-Afternoon
79°F 26°C
Light Showers
Early-Evening
81°F 27°C
Light Showers
Warm with a mix of sun and clouds, steady humidity and steady pressure. A stray shower or storm late in the day. Winds shifting from WSW to SW at 19 mph 30 km/h.
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