Guam Weather in October
October in Guam brings high temperatures around 30°C (86°F) during the day, dropping to 26°C (79°F) at night, and as part of the rainy season, heavy rainfall is common.
Rainfall in Guam in October
As part of the rainy season, Guam sees around 22 days of rain in October, with an average of 291 mm (11 in). Rain during the rainy season is significant rather than just light drizzle. Expect proper showers on most rainy days.
Temperature in Guam in October
In October, Guam gets high temperatures, with highs of 30°C (86°F). Nights cool to around 26°C (79°F). The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. At 26°C (79°F) overnight, the heat doesn't let up much after dark. If you're staying somewhere without air conditioning, a cold shower before bed and keeping the air moving can help.
Sunshine in Guam in October
The area experiences a moderate amount of sunshine, with approximately 133 hours of sunlight expected. Even though this month is part of the rainy season, you could still see the sun every now and then.October in Guam has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Micronesia, check out our Guam's climate page.
Guam Temperature in October
Min Temperature
26°C (79°F)
Max Temperature
30°C (86°F)
Chance of Rain
73%
Precipitation
291 mm (11 in)
Rainy days
22 days
Sunshine
133 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Guam typically stay consistent throughout October, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 25°C (77°F).
Average temperatures in October
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in October
Historical weather for Guam in October
Browse day-by-day weather records for Guam spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Guam historical weather extremes in October
Our historical data for Guam spans 1976 to 2025, revealing these weather extremes.
- The warmest day in October was on October 13, 1976, with a maximum of 34°C (93°F).
- The coldest October day was on October 19, 1994, with a maximum of 26°C (79°F).
- Guam registered its coldest October night on October 19, 1994, with temperatures dropping to 21°C (70°F).
Best Places in Micronesia in October
Find out more about the weather in Micronesia and which places have the best travel conditions in this month. See all of Micronesia in October →
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What to Wear in Guam in October
Warm but pleasant conditions in Guam in October. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. It's going to pour! Pack a good poncho and prepare for very wet conditions. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Guam in October
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Micronesia, check out our Guam's climate page.
See the full Guam climate overview or explore weather in Micronesia.
