Weather forecast for 10 daysMangilao, GU

Weather forecast for the weekend

Sunday Oct 18, 2026

  • 81°F
  • 77°F
Heavy Rain / Wind
Heavy Rain / Wind
  • Precip. probability: 100%
  • Precipitation: 0.91"
  • Wind: 63mphSE 137°
  • Humidity: 93%
  • UV index: 6
  • Sunrise: 6:11 am ChST
  • Sunset: 6:00 pm ChST
  • ▼
On Sunday, October 18, windy conditions with heavy showers are forecasted, requiring waterproof clothing and extra care.
Elevated precipitation of 0.91" is predicted for today. Temperatures will exhibit minor fluctuations, extending from a high of a moderately hot 80.6°F to a low of a warm 77°F.
The maximum heat index, which combines relative humidity and air temperature, is evaluated at a hot 87.8°F. Take into consideration that the heat index values are calculated for shade and light wind conditions.
Sunrise will be at 6:11 am and sunset at 6:00 pm; the daylight will last for 11h and 49min.

10-day overview

Daily temperatures

Maximum temperature: 84°C.
Coldest period: today - tomorrow 81°C.

Chance of precipitation

Highest chance: today 100%.

Long-term weather forecast

  • Sunday
  • Oct 18, 2026
  • 81°F
  • 77°F
Heavy Rain / Wind
Heavy Rain / Wind
  • Precip. probability: 100%
  • Precipitation: 0.91"
  • Wind: 63mphSE 137°
  • Humidity: 93%
  • UV index: 6
  • Sunrise: 6:11 am ChST
  • Sunset: 6:00 pm ChST
  • ▼
  • Monday
  • Oct 19, 2026
  • 81°F
  • 79°F
Showers / Wind
Showers / Wind
  • Precip. probability: 75%
  • Precipitation: 4.09"
  • Wind: 22mphSSE 149°
  • Humidity: 88%
  • UV index: 6
  • Sunrise: 6:11 am ChST
  • Sunset: 5:59 pm ChST
  • ▼
  • Tuesday
  • Oct 20, 2026
  • 84°F
  • 77°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 17%
  • Precipitation: 0.55"
  • Wind: 11mphESE 106°
  • Humidity: 83%
  • UV index: 10
  • Sunrise: 6:11 am ChST
  • Sunset: 5:59 pm ChST
  • ▼
  • Wednesday
  • Oct 21, 2026
  • 84°F
  • 77°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 14%
  • Precipitation: 0"
  • Wind: 12mphNE 55°
  • Humidity: 83%
  • UV index: 10
  • Sunrise: 6:12 am ChST
  • Sunset: 5:58 pm ChST
  • ▼
  • Thursday
  • Oct 22, 2026
  • 84°F
  • 77°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 23%
  • Precipitation: 0.08"
  • Wind: 13mphNE 56°
  • Humidity: 83%
  • UV index: 11
  • Sunrise: 6:12 am ChST
  • Sunset: 5:58 pm ChST
  • ▼
  • Friday
  • Oct 23, 2026
  • 82°F
  • 77°F
Showers
Showers
  • Precip. probability: 43%
  • Precipitation: 0.16"
  • Wind: 13mphENE 64°
  • Humidity: 84%
  • UV index: 11
  • Sunrise: 6:12 am ChST
  • Sunset: 5:57 pm ChST
  • ▼
  • Saturday
  • Oct 24, 2026
  • 82°F
  • 77°F
Showers
Showers
  • Precip. probability: 55%
  • Precipitation: 0.24"
  • Wind: 11mphENE 74°
  • Humidity: 83%
  • UV index: 11
  • Sunrise: 6:12 am ChST
  • Sunset: 5:57 pm ChST
  • ▼
  • Sunday
  • Oct 25, 2026
  • 82°F
  • 77°F
Few Showers
Few Showers
  • Precip. probability: 36%
  • Precipitation: 0.28"
  • Wind: 8mphE 81°
  • Humidity: 83%
  • UV index: 10
  • Sunrise: 6:12 am ChST
  • Sunset: 5:56 pm ChST
  • ▼
  • Monday
  • Oct 26, 2026
  • 82°F
  • 77°F
Showers
Showers
  • Precip. probability: 36%
  • Precipitation: 0.2"
  • Wind: 6mphENE 65°
  • Humidity: 82%
  • UV index: 11
  • Sunrise: 6:13 am ChST
  • Sunset: 5:56 pm ChST
  • ▼
  • Tuesday
  • Oct 27, 2026
  • 84°F
  • 77°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 18%
  • Precipitation: 0.12"
  • Wind: 6mphNE 45°
  • Humidity: 80%
  • UV index: 11
  • Sunrise: 6:13 am ChST
  • Sunset: 5:55 pm ChST
  • ▼
During the ten-day period, showery, cloud-filled and mostly clear weather is anticipated.
Rainfall is anticipated on Sunday through Tuesday, Thursday through next Tuesday.
The variation in maximum temperature will be negligible in the forecast period ahead. The maximum temperature will vary between 80.6°F and 84.2°F, while changes in the overnight low will be also barely noticeable, as the lowest temperatures will remain in the range of 77°F to 78.8°F.
Tuesday through Thursday and next Tuesday, with the highest temperature of 84.2°F, will be the hottest days; with a maximum temperature of 80.6°F, Sunday and Monday will be the coldest days.
Including the humidity's impact, the maximum feel-like temperature may increase greatly and range between a humid 87.8°F and a sweltering 95°F.
Updated: Oct 17, 2026 @ 16:51:30 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

Today, wind-driven rainfall is anticipated, requiring rain gear and extra caution on the roads.

Increased precipitation of 0.91" is anticipated with a high probability in Mangilao.

Today, the maximum temperature will be 80.6°F, while the minimum temperature will be 77°F. The maximum heat index, which combines air temperature and relative humidity, is evaluated at 87.8°F.

On Sunday, in Mangilao, sunrise will be at 6:11 am and sunset at 6:00 pm (ChST).

In Mangilao, today, there will be 11h and 49min of daylight.