Weather forecast for 10 daysRoy, MT

Weather forecast for the weekend

Saturday Oct 17, 2026

  • 77°F
  • 43°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 16mphWSW 252°
  • Humidity: 19%
  • UV index: 3
  • Sunrise: 7:37 am MDT
  • Sunset: 6:24 pm MDT
  • ▼
Today, expect brilliant sunshine under mostly clear skies.
A remarkable high of a moderately hot 77°F during the day and a stark low of a chilly 42.8°F at night are anticipated.
With a forecast of 77°F, conditions deviate from October's average and instead resemble September's climate trend.
Sunrise was at 7:37 am and sunset will be at 6:24 pm; the daylight will last for 10h and 47min.

Sunday Oct 18, 2026

  • 57°F
  • 36°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 12mphE 100°
  • Humidity: 44%
  • UV index: 3
  • Sunrise: 7:39 am MDT
  • Sunset: 6:22 pm MDT
  • ▼
Tomorrow, in Roy, sunlight and clouds will take turns dominating the sky.
The temperature scale will run from a maximum of a refreshing 57.2°F to a minimum of a wintry 35.6°F.
Tomorrow's highest temperature will be relatively higher than the average October maximum of 52.2°F.
Sunrise will be at 7:39 am and sunset at 6:22 pm; tomorrow's daylight will last for 10h and 44min.

10-day overview

Daily temperatures

Warmest day: today 77°C.
Coldest period: Sunday - Monday 46°C.

Chance of precipitation

Highest chance: Friday 41%.

Long-term weather forecast

  • Saturday
  • Oct 17, 2026
  • 77°F
  • 43°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 16mphWSW 252°
  • Humidity: 19%
  • UV index: 3
  • Sunrise: 7:37 am MDT
  • Sunset: 6:24 pm MDT
  • ▼
  • Sunday
  • Oct 18, 2026
  • 57°F
  • 36°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 12mphE 100°
  • Humidity: 44%
  • UV index: 3
  • Sunrise: 7:39 am MDT
  • Sunset: 6:22 pm MDT
  • ▼
  • Monday
  • Oct 19, 2026
  • 66°F
  • 43°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 7mphESE 112°
  • Humidity: 52%
  • UV index: 3
  • Sunrise: 7:40 am MDT
  • Sunset: 6:20 pm MDT
  • ▼
  • Tuesday
  • Oct 20, 2026
  • 61°F
  • 37°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 13mphWNW 295°
  • Humidity: 52%
  • UV index: 2
  • Sunrise: 7:42 am MDT
  • Sunset: 6:19 pm MDT
  • ▼
  • Wednesday
  • Oct 21, 2026
  • 66°F
  • 46°F
Sunny
Sunny
  • Precip. probability: 4%
  • Precipitation: 0"
  • Wind: 12mphSSE 155°
  • Humidity: 54%
  • UV index: 3
  • Sunrise: 7:43 am MDT
  • Sunset: 6:17 pm MDT
  • ▼
  • Thursday
  • Oct 22, 2026
  • 70°F
  • 46°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 8mphSW 228°
  • Humidity: 50%
  • UV index: 3
  • Sunrise: 7:44 am MDT
  • Sunset: 6:15 pm MDT
  • ▼
  • Friday
  • Oct 23, 2026
  • 59°F
  • 36°F
PM Showers
PM Showers
  • Precip. probability: 41%
  • Precipitation: 0.16"
  • Wind: 19mphWNW 284°
  • Humidity: 66%
  • UV index: 2
  • Sunrise: 7:46 am MDT
  • Sunset: 6:13 pm MDT
  • ▼
  • Saturday
  • Oct 24, 2026
  • 48°F
  • 30°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 11%
  • Precipitation: 0"
  • Wind: 17mphWNW 291°
  • Humidity: 56%
  • UV index: 2
  • Sunrise: 7:47 am MDT
  • Sunset: 6:12 pm MDT
  • ▼
  • Sunday
  • Oct 25, 2026
  • 46°F
  • 32°F
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 11%
  • Precipitation: 0"
  • Wind: 12mphSE 136°
  • Humidity: 65%
  • UV index: 2
  • Sunrise: 7:49 am MDT
  • Sunset: 6:10 pm MDT
  • ▼
  • Monday
  • Oct 26, 2026
  • 46°F
  • 32°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 24%
  • Precipitation: 0"
  • Wind: 11mphW 274°
  • Humidity: 65%
  • UV index: 2
  • Sunrise: 7:50 am MDT
  • Sunset: 6:08 pm MDT
  • ▼
Looking ahead, conditions suggest a period of cloudy, bright and damp weather is expected.
With a probability of 41%, rainfall is anticipated only on Friday. The precipitation will be light at 0.16".
Significant changes in temperature are expected across the forecast period. Maximum temperatures are forecasted between 46.4°F and 77°F, while the fluctuation in night temperatures will be also significant, as the minimum temperature is expected to range between 30.2°F and 46.4°F.
With a high of 77°F, today is the warmest day; next Sunday and Monday, with the highest temperature of 46.4°F, will be the coldest days.
Updated: Oct 17, 2026 @ 15:07:46 UTC
Published by: Weather Atlas | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

Today, in Roy, golden sunshine will carry through the day.

Today, the maximum temperature in Roy will be 77°F, while the minimum temperature will be 42.8°F.
The maximum temperature today will be significantly higher than the average highest temperature of 52.2°F in October. The lowest temperature today will be a few degrees higher than the average low temperature.

On Saturday, in Roy, sunrise was at 7:37 am and sunset will be at 6:24 pm (MDT).

Today in Roy, the daylight will last for 10h and 47min.

On Sunday, sun and clouds will share the sky, creating a partly cloudy day.

Tomorrow, the highest temperature will be 57.2°F, while the lowest temperature will be 35.6°F.
The highest temperature tomorrow will be relatively higher than the average maximum temperature in October. The lowest temperature tomorrow will be in line with the average low temperature.

On Sunday, in Roy, sunrise will be at 7:39 am and sunset at 6:22 pm (MDT).

In Roy, Montana, the length of the day tomorrow will be 10h and 44min.