Weather forecast for 10 days
Lewistown, MT

Weather forecast for the weekend

Saturday, Jun 21.

Partly Cloudy
5:20 am

9:18 pm
MDT
Partly Cloudy
64°F / 39°F
  • Wind: 17mph W
  • Humidity: 60%
  • Precip. probability: 20%
  • Precipitation: 0.08"
  • UV index: 8
On Saturday, June 21, sun and clouds will share the sky, creating a partly cloudy day.
Minimal precipitation is expected. The predicted temperature range extends from a high of a breezy 64.4°F to a low of an icy 39.2°F.
Saturday's highest temperature will be a couple of degrees lower than the average June maximum of 68.5°F.
Sunrise will be at 5:20 am and sunset at 9:18 pm; the daylight will last for 15h and 58min.

Sunday, Jun 22.

Light Rain
5:20 am

9:18 pm
MDT
Light Rain
45°F / 36°F
  • Wind: 14mph WNW
  • Humidity: 86%
  • Precip. probability: 70%
  • Precipitation: 0.24"
  • UV index: 5
On Sunday, June 22, light rain showers will develop under cloudy skies.
The chance of precipitation is high. However, the rainfall will be light. The highest daytime temperature will reach a chilly 44.6°F, creating a slight contrast with the predicted nighttime low of a wintry 35.6°F.
On Sunday, the temperature will be lower and more consistent with May's typical high of 58.5°F than with June's 68.5°F.
Sunrise will be at 5:20 am and sunset at 9:18 pm; the daylight will last for 15h and 58min.

Frequently asked questions

What is the weather forecast for Lewistown for Saturday?
On Saturday, in Lewistown, scattered clouds may briefly filter the sunlight, but it will remain bright overall.
Will it rain on Saturday?
On Saturday, there is a low chance of minimal precipitation in Lewistown.
What will be the highest temperature in Lewistown on Saturday?
On Saturday, the maximum temperature will be 64.4°F, while the minimum temperature will be 39.2°F.
What is the weather forecast for Lewistown for Sunday?
On Sunday, rainy periods with light showers are expected.
Will it rain on Sunday?
Light precipitation of 0.24" is predicted on Sunday. The chance of rainfall is 70%.
What will be the highest temperature on Sunday?
On Sunday, the maximum temperature will be 44.6°F, while the minimum temperature will be 35.6°F.
What is the weather forecast for Lewistown for the next ten days?
In Lewistown, weather will be unstable, and a combination of dry and sunny, gloomy, turbulent and rainy weather is predicted for the next ten days.
Will it rain in the next ten days?
Rainfall is anticipated on Friday through Sunday in Lewistown. Friday, with moderate precipitation of 0.55", will be the day with the most rainfall.
How warm will it be in the next ten days?
The maximum temperature will vary between 44.6°F and 78.8°F, as the minimum temperature will vary between 35.6°F and 53.6°F.
What will be the warmest and the coldest days?
Today is the warmest day, with a maximum temperature of 78.8°F. With a maximum temperature of 44.6°F, Sunday will be the coldest day.

Long-term weather forecast

ThuJun 19.
  • 79°F
  • 54°F
Mostly Sunny
Mostly Sunny
  • Wind: 8mph NNE
  • Humidity: 31%
  • UV index: 8
  • Precip. probability: 20%
  • Precipitation: 0"
  • 5:20 am 9:18 pm MDT
FriJun 20.
  • 68°F
  • 48°F
Scattered Thunderstorms
Scattered Thunderstorms
  • Wind: 14mph ESE
  • Humidity: 63%
  • UV index: 8
  • Precip. probability: 59%
  • Precipitation: 0.55"
  • 5:20 am 9:18 pm MDT
SatJun 21.
  • 64°F
  • 39°F
Partly Cloudy
Partly Cloudy
  • Wind: 17mph W
  • Humidity: 60%
  • UV index: 8
  • Precip. probability: 20%
  • Precipitation: 0.08"
  • 5:20 am 9:18 pm MDT
SunJun 22.
  • 45°F
  • 36°F
Light Rain
Light Rain
  • Wind: 14mph WNW
  • Humidity: 86%
  • UV index: 5
  • Precip. probability: 70%
  • Precipitation: 0.24"
  • 5:20 am 9:18 pm MDT
MonJun 23.
  • 64°F
  • 41°F
Mostly Sunny
Mostly Sunny
  • Wind: 7mph SW
  • Humidity: 52%
  • UV index: 8
  • Precip. probability: 5%
  • Precipitation: 0"
  • 5:21 am 9:19 pm MDT
TueJun 24.
  • 70°F
  • 46°F
Partly Cloudy
Partly Cloudy
  • Wind: 7mph NNW
  • Humidity: 50%
  • UV index: 8
  • Precip. probability: 18%
  • Precipitation: 0"
  • 5:21 am 9:19 pm MDT
WedJun 25.
  • 75°F
  • 50°F
Partly Cloudy
Partly Cloudy
  • Wind: 6mph SSW
  • Humidity: 47%
  • UV index: 8
  • Precip. probability: 12%
  • Precipitation: 0"
  • 5:21 am 9:19 pm MDT
ThuJun 26.
  • 77°F
  • 52°F
Mostly Sunny
Mostly Sunny
  • Wind: 6mph WSW
  • Humidity: 44%
  • UV index: 8
  • Precip. probability: 24%
  • Precipitation: 0"
  • 5:22 am 9:19 pm MDT
FriJun 27.
  • 77°F
  • 52°F
Partly Cloudy
Partly Cloudy
  • Wind: 7mph WNW
  • Humidity: 45%
  • UV index: 8
  • Precip. probability: 21%
  • Precipitation: 0"
  • 5:22 am 9:19 pm MDT
SatJun 28.
  • 75°F
  • 52°F
Mostly Sunny
Mostly Sunny
  • Wind: 8mph WNW
  • Humidity: 48%
  • UV index: 8
  • Precip. probability: 19%
  • Precipitation: 0"
  • 5:23 am 9:18 pm MDT
Over the course of the next ten days, expect shifting weather, and a mix of dry and sunny, overcast, storm-filled and rain-soaked weather is expected.
Rainfall is expected on Friday through Sunday.
Temperature differences will be noticeable in the coming days. Maximum temperatures are forecasted between 44.6°F and 78.8°F, while the nightly low temperatures will show also a considerable swing, as the lowest temperatures will be recorded between 35.6°F and 53.6°F.
Today is the warmest day, with a maximum temperature of 78.8°F; expect the coldest day on Sunday with a high of 44.6°F.
Updated: Jun 19, 2025 @ 19:07:36 UTC
Published by: Weather U.S. | About Us
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