Weather forecast for tomorrowUmatac, GU

Weather forecast for tomorrow

Monday Oct 19, 2026

  • 82°F
  • 79°F
Showers / Wind
Showers / Wind
  • Precip. probability: 65%
  • Precipitation: 0.51"
  • Wind: 24mphSSE 149°
  • Humidity: 88%
  • UV index: 6
  • Sunrise: 6:12 am ChST
  • Sunset: 6:00 pm ChST
  • ▼
On Monday, in Umatac, showers and windy weather are also anticipated, particularly in the late afternoon.
The likelihood of rainfall for tomorrow is high, and precipitation will be moderate. A modest fluctuation in temperature is expected, achieving a maximum of a temperate 82.4°F and dipping to a minimum of a moderately hot 78.8°F.
The maximum heat index, which modifies the air temperature to account for humidity, is assessed at a humid 91.4°F. Note that heat index values are valued for light wind and location in the shade.
The forecasted daily high is projected to match October's typical maximum 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 48min.

Hourly overview

Hourly temperatures

Warmest period: 9 am - 3 pm 90°C.
Coldest hour: 3 am 86°C.

Chance of precipitation

Highest chance: 12 am 97%.

Hourly weather forecast

  • 12 am
  • 81°F
  • Feels like:
    88°F
Rain / Wind
Rain / Wind
  • Precip. probability: 97%
  • Precipitation: 0.16"
  • Wind: 27mphSE 144°
  • Humidity: 89%
  • Pressure: 29.68"Hg
  • Visibility: 5mi
  • UV index: 0
  • ▼
  • 2 am
  • 79°F
  • Feels like:
    86°F
Showers / Wind
Showers / Wind
  • Precip. probability: 68%
  • Precipitation: 0.12"
  • Wind: 26mphSSE 147°
  • Humidity: 91%
  • Pressure: 29.68"Hg
  • Visibility: 7mi
  • UV index: 0
  • ▼
  • 4 am
  • 79°F
  • Feels like:
    86°F
Scattered Thunderstorms / Wind
Scattered Thunderstorms / Wind
  • Precip. probability: 55%
  • Precipitation: 0.08"
  • Wind: 24mphSSE 148°
  • Humidity: 93%
  • Pressure: 29.71"Hg
  • Visibility: 7mi
  • UV index: 0
  • ▼
  • 6 am
  • 79°F
  • Feels like:
    88°F
Showers / Wind
Showers / Wind
  • Precip. probability: 47%
  • Precipitation: 0.04"
  • Wind: 24mphSSE 149°
  • Humidity: 91%
  • Pressure: 29.74"Hg
  • Visibility: 7mi
  • UV index: 0
  • ▼
Sunrise: 6:12 am
  • 8 am
  • 81°F
  • Feels like:
    90°F
Showers / Wind
Showers / Wind
  • Precip. probability: 65%
  • Precipitation: 0.04"
  • Wind: 24mphSSE 149°
  • Humidity: 89%
  • Pressure: 29.8"Hg
  • Visibility: 7mi
  • UV index: 1
  • ▼
  • 10 am
  • 82°F
  • Feels like:
    91°F
Showers / Wind
Showers / Wind
  • Precip. probability: 62%
  • Precipitation: 0.04"
  • Wind: 24mphSSE 150°
  • Humidity: 87%
  • Pressure: 29.8"Hg
  • Visibility: 7mi
  • UV index: 4
  • ▼
  • 12 pm
  • 81°F
  • Feels like:
    90°F
Showers / Wind
Showers / Wind
  • Precip. probability: 64%
  • Precipitation: 0.08"
  • Wind: 24mphSSE 152°
  • Humidity: 87%
  • Pressure: 29.8"Hg
  • Visibility: 7mi
  • UV index: 6
  • ▼
  • 2 pm
  • 81°F
  • Feels like:
    90°F
Showers / Wind
Showers / Wind
  • Precip. probability: 62%
  • Precipitation: 0.08"
  • Wind: 23mphSSE 150°
  • Humidity: 88%
  • Pressure: 29.77"Hg
  • Visibility: 7mi
  • UV index: 4
  • ▼
  • 4 pm
  • 81°F
  • Feels like:
    90°F
Showers
Showers
  • Precip. probability: 62%
  • Precipitation: 0.04"
  • Wind: 19mphSSE 150°
  • Humidity: 88%
  • Pressure: 29.77"Hg
  • Visibility: 7mi
  • UV index: 1
  • ▼
  • 6 pm
  • 81°F
  • Feels like:
    88°F
Showers
Showers
  • Precip. probability: 54%
  • Precipitation: 0.04"
  • Wind: 17mphSE 143°
  • Humidity: 89%
  • Pressure: 29.8"Hg
  • Visibility: 7mi
  • UV index: 0
  • ▼
Sunset: 6:00 pm
  • 8 pm
  • 81°F
  • Feels like:
    88°F
Cloudy
Cloudy
  • Precip. probability: 24%
  • Precipitation: 0"
  • Wind: 16mphSE 136°
  • Humidity: 88%
  • Pressure: 29.85"Hg
  • Visibility: 9mi
  • UV index: 0
  • ▼
  • 10 pm
  • 81°F
  • Feels like:
    88°F
Cloudy
Cloudy
  • Precip. probability: 22%
  • Precipitation: 0"
  • Wind: 14mphSE 134°
  • Humidity: 90%
  • Pressure: 29.85"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Tomorrow, a combination of primarily rainy and occasionally cloudy and storm-filled weather is forecasted.
Rainfall is anticipated from 12 am to 7 pm. With moderate precipitation of 0.16", most rainfall is expected at 12 am.
The temperature difference will be indistinguishable, with the lowest temperature of 78.8°F and the highest temperature of 82.4°F. The feels-like temperature difference will be indistinguishable, with the lowest temperature of 86°F and the highest temperature of 91.4°F. The warmest part of the day will be around 10 am.
The high temperature is expected to be consistent with October's usual value of 84.4°F. The minimum temperature will be also slightly cooler than October's average low of 82.6°F.
Updated: Oct 17, 2026 @ 18:57:06 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

On Monday, brief showers and gusty winds are expected in the evening.

Moderate precipitation of 0.51" is predicted. The likelihood of rainfall is 65%.

Tomorrow, the maximum temperature will be 82.4°F, while the minimum temperature will be 78.8°F. The maximum heat index, which calculates the temperature value influenced by the moisture in the air, is evaluated at 91.4°F.
The maximum temperature will be in line with the average highest temperature of 84.4°F in October. The lowest temperature will be relatively lower than the average low of 82.6°F.

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

In Umatac, the length of the day tomorrow will be 11h and 48min.