Weather forecast for tomorrowAgat, GU

Weather forecast for tomorrow

Sunday Oct 18, 2026

  • 82°F
  • 79°F
Heavy Rain / Wind
Heavy Rain / Wind
  • Precip. probability: 100%
  • Precipitation: 4.69"
  • Wind: 77mphSE 140°
  • Humidity: 94%
  • UV index: 4
  • Sunrise: 6:12 am ChST
  • Sunset: 6:00 pm ChST
  • ▼
On Sunday, October 18, wind-driven rainfall is also anticipated, requiring rain gear and extra caution on the roads.
Extreme precipitation of 4.69" is expected for tomorrow. Modest temperature shifts from a high of a moderately hot 82.4°F to a low of a warm 78.8°F are predicted.
The maximum heat index, which represents the influence of relative humidity on air temperature, is evaluated at a tropical 93.2°F. Note that heat index values are valued for light wind and location in the shade.
Expect the maximum temperature to remain consistent with the typical October high of 84.4°F.
Sunrise will be at 6:12 am and sunset at 6:00 pm; tomorrow's daylight will last for 11h and 49min.

Hourly overview

Hourly temperatures

Warmest hour: 3 pm 93°C.
Coldest period: 12 am - 6 am 90°C.

Chance of precipitation

Highest chance: 12 am 73%.

Hourly weather forecast

  • 12 am
  • 81°F
  • Feels like:
    90°F
Showers / Wind
Showers / Wind
  • Precip. probability: 73%
  • Precipitation: 0.16"
  • Wind: 25mphSE 145°
  • Humidity: 91%
  • Pressure: 29.68"Hg
  • Visibility: 4mi
  • UV index: 0
  • ▼
  • 2 am
  • 81°F
  • Feels like:
    88°F
Showers / Wind
Showers / Wind
  • Precip. probability: 67%
  • Precipitation: 0.12"
  • Wind: 25mphSSE 148°
  • Humidity: 91%
  • Pressure: 29.68"Hg
  • Visibility: 7mi
  • UV index: 0
  • ▼
  • 4 am
  • 81°F
  • Feels like:
    88°F
Thunderstorms / Wind
Thunderstorms / Wind
  • Precip. probability: 62%
  • Precipitation: 0.08"
  • Wind: 24mphSSE 148°
  • Humidity: 92%
  • Pressure: 29.68"Hg
  • Visibility: 6mi
  • UV index: 0
  • ▼
  • 6 am
  • 81°F
  • Feels like:
    90°F
Showers / Wind
Showers / Wind
  • Precip. probability: 49%
  • Precipitation: 0.04"
  • Wind: 22mphSSE 150°
  • Humidity: 89%
  • Pressure: 29.71"Hg
  • Visibility: 7mi
  • UV index: 0
  • ▼
Sunrise: 6:12 am
  • 8 am
  • 81°F
  • Feels like:
    91°F
Showers / Wind
Showers / Wind
  • Precip. probability: 73%
  • Precipitation: 0.12"
  • Wind: 22mphSSE 152°
  • Humidity: 90%
  • Pressure: 29.77"Hg
  • Visibility: 7mi
  • UV index: 1
  • ▼
  • 10 am
  • 82°F
  • Feels like:
    93°F
Showers / Wind
Showers / Wind
  • Precip. probability: 62%
  • Precipitation: 0.04"
  • Wind: 22mphSSE 152°
  • Humidity: 87%
  • Pressure: 29.8"Hg
  • Visibility: 7mi
  • UV index: 4
  • ▼
  • 12 pm
  • 82°F
  • Feels like:
    91°F
Showers / Wind
Showers / Wind
  • Precip. probability: 62%
  • Precipitation: 0.08"
  • Wind: 23mphSSE 154°
  • Humidity: 88%
  • Pressure: 29.8"Hg
  • Visibility: 7mi
  • UV index: 6
  • ▼
  • 2 pm
  • 82°F
  • Feels like:
    91°F
Showers / Wind
Showers / Wind
  • Precip. probability: 62%
  • Precipitation: 0.08"
  • Wind: 22mphSSE 154°
  • Humidity: 88%
  • Pressure: 29.77"Hg
  • Visibility: 6mi
  • UV index: 4
  • ▼
  • 4 pm
  • 82°F
  • Feels like:
    91°F
Showers
Showers
  • Precip. probability: 54%
  • Precipitation: 0.04"
  • Wind: 18mphSSE 153°
  • Humidity: 88%
  • Pressure: 29.77"Hg
  • Visibility: 7mi
  • UV index: 1
  • ▼
  • 6 pm
  • 81°F
  • Feels like:
    91°F
Showers
Showers
  • Precip. probability: 44%
  • Precipitation: 0.04"
  • Wind: 17mphSSE 148°
  • Humidity: 88%
  • Pressure: 29.8"Hg
  • Visibility: 7mi
  • UV index: 0
  • ▼
Sunset: 6:00 pm
  • 8 pm
  • 81°F
  • Feels like:
    90°F
Cloudy
Cloudy
  • Precip. probability: 24%
  • Precipitation: 0"
  • Wind: 15mphSE 140°
  • Humidity: 88%
  • Pressure: 29.85"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 10 pm
  • 81°F
  • Feels like:
    90°F
Cloudy
Cloudy
  • Precip. probability: 23%
  • Precipitation: 0"
  • Wind: 13mphSE 134°
  • Humidity: 88%
  • Pressure: 29.85"Hg
  • Visibility: 9mi
  • UV index: 0
  • ▼
Tomorrow, a combination of primarily showery and occasionally overcast and thunderstorm-prone weather is expected.
Rainfall is anticipated from 12 am to 7 pm and at 9 pm. With moderate precipitation of 0.16", most rainfall is expected at 12 am.
The temperature difference throughout the day will be indistinguishable, with the lowest temperature of 80.6°F and the highest temperature of 82.4°F. The feels-like temperature variation will be indistinguishable, with the lowest temperature of 87.8°F and the highest temperature of 93.2°F.
Tomorrow, the forecasted high aligns resembling the average peak in October. The lowest temperature is expected to be also a couple of degrees lower than the average minimum in October, typically 82.6°F.
Updated: Oct 17, 2026 @ 13:50:13 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

On Sunday, windy and rainy conditions are expected, increasing the risk of water pooling on roads.

Yes, it will rain tomorrow. Weather alert - damaging precipitation of 4.69" is forecasted.

Tomorrow, the highest temperature in Agat will be 82.4°F, while the lowest temperature will be 78.8°F. The maximum heat index, which factors the actual air temperature with the relative humidity, is computed to be 93.2°F.
Tomorrow, the maximum temperature will be in line with the average highest temperature in October. The lowest temperature will be a couple of degrees lower than the average low of 82.6°F.

On Sunday, in Agat, sunrise will be at 6:12 am and sunset at 6:00 pm (ChST).

In Agat, the length of the day tomorrow will be 11h and 49min.