Weather forecast for 10 daysDecker, MT

Weather forecast for the weekend

Saturday Oct 17, 2026

  • 81°F
  • 37°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 6mphN 9°
  • Humidity: 21%
  • UV index: 3
  • Sunrise: 7:26 am MDT
  • Sunset: 6:19 pm MDT
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Today, bright conditions and mild breezes are expected.
A notable disparity in temperature is predicted, reaching up to a maximum of a temperate 80.6°F and falling to a minimum of a cold 37.4°F.
The day's peak of 80.6°F reflects September's seasonal pattern more than October's.
Sunrise was at 7:26 am and sunset will be at 6:19 pm; the daylight will last for 10h and 53min.

Sunday Oct 18, 2026

  • 68°F
  • 37°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 9mphNE 47°
  • Humidity: 39%
  • UV index: 3
  • Sunrise: 7:27 am MDT
  • Sunset: 6:17 pm MDT
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Tomorrow, on Sunday, sunshine will dominate, with only occasional cloud cover.
Temperature changes will be considerable, from a high of a pleasant 68°F to a low of a wintry 37.4°F.
A high of 68°F is expected, which resembles September's climate average of 74.1°F more than October's 56.8°F.
Sunrise will be at 7:27 am and sunset at 6:17 pm; tomorrow's daylight will last for 10h and 50min.

10-day overview

Daily temperatures

Warmest day: today 81°C.
Coldest day: Saturday 24.10. 54°C.

Chance of precipitation

Highest chance: Friday 62%.

Long-term weather forecast

  • Saturday
  • Oct 17, 2026
  • 81°F
  • 37°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 6mphN 9°
  • Humidity: 21%
  • UV index: 3
  • Sunrise: 7:26 am MDT
  • Sunset: 6:19 pm MDT
  • ▼
  • Sunday
  • Oct 18, 2026
  • 68°F
  • 37°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 9mphNE 47°
  • Humidity: 39%
  • UV index: 3
  • Sunrise: 7:27 am MDT
  • Sunset: 6:17 pm MDT
  • ▼
  • Monday
  • Oct 19, 2026
  • 72°F
  • 37°F
Sunny
Sunny
  • Precip. probability: 4%
  • Precipitation: 0"
  • Wind: 6mphNE 46°
  • Humidity: 43%
  • UV index: 3
  • Sunrise: 7:28 am MDT
  • Sunset: 6:15 pm MDT
  • ▼
  • Tuesday
  • Oct 20, 2026
  • 73°F
  • 36°F
Sunny
Sunny
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 7mphNW 320°
  • Humidity: 38%
  • UV index: 3
  • Sunrise: 7:30 am MDT
  • Sunset: 6:14 pm MDT
  • ▼
  • Wednesday
  • Oct 21, 2026
  • 72°F
  • 39°F
Sunny
Sunny
  • Precip. probability: 5%
  • Precipitation: 0"
  • Wind: 9mphENE 67°
  • Humidity: 49%
  • UV index: 3
  • Sunrise: 7:31 am MDT
  • Sunset: 6:12 pm MDT
  • ▼
  • Thursday
  • Oct 22, 2026
  • 73°F
  • 45°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 4%
  • Precipitation: 0"
  • Wind: 6mphN 5°
  • Humidity: 48%
  • UV index: 3
  • Sunrise: 7:32 am MDT
  • Sunset: 6:10 pm MDT
  • ▼
  • Friday
  • Oct 23, 2026
  • 70°F
  • 37°F
PM Showers
PM Showers
  • Precip. probability: 62%
  • Precipitation: 0.35"
  • Wind: 11mphNW 325°
  • Humidity: 56%
  • UV index: 2
  • Sunrise: 7:34 am MDT
  • Sunset: 6:09 pm MDT
  • ▼
  • Saturday
  • Oct 24, 2026
  • 54°F
  • 32°F
AM Showers
AM Showers
  • Precip. probability: 36%
  • Precipitation: 0.04"
  • Wind: 12mphNNW 339°
  • Humidity: 58%
  • UV index: 3
  • Sunrise: 7:35 am MDT
  • Sunset: 6:07 pm MDT
  • ▼
  • Sunday
  • Oct 25, 2026
  • 57°F
  • 34°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 12%
  • Precipitation: 0"
  • Wind: 8mphNNE 20°
  • Humidity: 57%
  • UV index: 3
  • Sunrise: 7:36 am MDT
  • Sunset: 6:06 pm MDT
  • ▼
  • Monday
  • Oct 26, 2026
  • 55°F
  • 34°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 4%
  • Precipitation: 0"
  • Wind: 8mphNW 326°
  • Humidity: 55%
  • UV index: 3
  • Sunrise: 7:38 am MDT
  • Sunset: 6:04 pm MDT
  • ▼
During the ten-day period, sunny, rainy and cloudy weather is expected.
Rainfall is forecasted for Friday and next Saturday.
Substantial differences in temperature are forecasted in the next ten days. Highs will range from 53.6°F to 80.6°F, while the nightly low temperatures will show also a considerable swing, as temperatures overnight will fluctuate from 32°F up to 44.6°F.
Today is the warmest day, with a maximum temperature of 80.6°F; with the highest temperature of 53.6°F, next Saturday will be the coldest day.
Updated: Oct 17, 2026 @ 16:38:28 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

On Saturday, mainly sunny skies with just a few high clouds are anticipated.

Today, the maximum temperature will be 80.6°F, while the minimum temperature will be 37.4°F.
Today, the highest temperature will be noticeably higher than the average maximum of 56.8°F in October. The lowest temperature today will be in line with the average low temperature.

On Saturday, in Decker, sunrise was at 7:26 am and sunset will be at 6:19 pm (MDT).

In Decker, the length of the day today will be 10h and 53min.

On Sunday, in Decker, sunshine will take center stage, with just faint traces of clouds.

Tomorrow, the maximum temperature will be 68°F, while the minimum temperature will be 37.4°F.
Tomorrow, the highest temperature will be significantly higher than the average maximum of 56.8°F in October. The lowest temperature tomorrow will be in line with the average low temperature.

On Sunday, in Decker, sunrise will be at 7:27 am and sunset at 6:17 pm (MDT).

In Decker, tomorrow, there will be 10h and 50min of daylight.