Weather forecast for 10 days
Lewistown, MT

Weather forecast for the weekend

Saturday, May 17.

Partly Cloudy
5:37 am

8:51 pm
MDT
Partly Cloudy
59°F / 39°F
  • Wind: 12mph SSE
  • Humidity: 60%
  • Precip. probability: 24%
  • Precipitation: 0"
  • UV index: 5
On Saturday, in Lewistown, high-altitude clouds may scatter across the sky, but the sun will still shine.
Rainfall is not forecasted. Temperatures are expected to peak at a refreshing 59°F and drop to a minimum of an icy 39.2°F.
Saturday's peak is expected to reflect the usual May high temperature of 58.5°F.
Sunrise will be at 5:37 am and sunset at 8:51 pm; the daylight will last for 15h and 14min.

Sunday, May 18.

Showers
5:36 am

8:52 pm
MDT
Showers
48°F / 34°F
  • Wind: 17mph E
  • Humidity: 81%
  • Precip. probability: 49%
  • Precipitation: 0.35"
  • UV index: 4
On Sunday, in Lewistown, expect showers through the day, with the rain easing off by evening.
With a low probability, light precipitation is forecasted. The temperature will vary between a maximum of a chilly 48.2°F and a minimum of a cold 33.8°F.
On Sunday, the temperature will be lower and more consistent with April's typical high of 47.8°F than with May's 58.5°F.
Sunrise will be at 5:36 am and sunset at 8:52 pm; the daylight will last for 15h and 16min.

Frequently asked questions

What is the weather forecast for Lewistown for Saturday?
On Saturday, occasional clouds will pass by, but expect bright spells.
Will it rain on Saturday?
No, it will not rain on Saturday.
What will be the maximum temperature on Saturday?
On Saturday, the highest temperature will be 59°F, while the lowest temperature will be 39.2°F.
What is the weather forecast for Lewistown for Sunday?
On Sunday, showers will pass through, with occasional dry intervals.
Will it rain on Sunday?
Light precipitation of 0.35" is anticipated on Sunday. The possibility of rainfall is 49%.
What will be the highest temperature on Sunday?
On Sunday, the maximum temperature will be 48.2°F, while the minimum temperature will be 33.8°F.
What is the weather forecast for Lewistown for the next ten days?
In Lewistown, a combination of showery and cloudy weather is forecasted for the next ten days.
Will it rain in the next ten days in Lewistown?
Rainfall is forecasted for Tuesday through Thursday, Sunday through next Tuesday in Lewistown. With moderate precipitation of 0.67", Wednesday will be the day with the most rainfall.
How warm will it be in the next ten days?
The maximum temperature will range between 46.4°F and 64.4°F, while the minimum temperature will be between 33.8°F and 41°F.
What will be the warmest and the coldest days?
Next Thursday will be the warmest day, with a maximum temperature of 64.4°F. Tomorrow will be the coldest day, with a maximum temperature of 46.4°F.

Long-term weather forecast

TueMay 13.
  • 50°F
  • 39°F
Showers
Showers
  • Wind: 10mph WNW
  • Humidity: 71%
  • UV index: 3
  • Precip. probability: 69%
  • Precipitation: 0.51"
  • 5:41 am 8:46 pm MDT
WedMay 14.
  • 46°F
  • 37°F
Rain
Rain
  • Wind: 11mph NW
  • Humidity: 90%
  • UV index: 3
  • Precip. probability: 99%
  • Precipitation: 0.67"
  • 5:40 am 8:47 pm MDT
ThuMay 15.
  • 50°F
  • 36°F
Showers
Showers
  • Wind: 19mph WNW
  • Humidity: 79%
  • UV index: 3
  • Precip. probability: 57%
  • Precipitation: 0.2"
  • 5:39 am 8:48 pm MDT
FriMay 16.
  • 57°F
  • 36°F
Partly Cloudy
Partly Cloudy
  • Wind: 12mph WNW
  • Humidity: 63%
  • UV index: 6
  • Precip. probability: 24%
  • Precipitation: 0"
  • 5:38 am 8:49 pm MDT
SatMay 17.
  • 59°F
  • 39°F
Partly Cloudy
Partly Cloudy
  • Wind: 12mph SSE
  • Humidity: 60%
  • UV index: 5
  • Precip. probability: 24%
  • Precipitation: 0"
  • 5:37 am 8:51 pm MDT
SunMay 18.
  • 48°F
  • 34°F
Showers
Showers
  • Wind: 17mph E
  • Humidity: 81%
  • UV index: 4
  • Precip. probability: 49%
  • Precipitation: 0.35"
  • 5:36 am 8:52 pm MDT
MonMay 19.
  • 48°F
  • 36°F
Showers
Showers
  • Wind: 10mph NE
  • Humidity: 78%
  • UV index: 4
  • Precip. probability: 46%
  • Precipitation: 0.12"
  • 5:34 am 8:53 pm MDT
TueMay 20.
  • 55°F
  • 37°F
PM Showers
PM Showers
  • Wind: 13mph WNW
  • Humidity: 65%
  • UV index: 5
  • Precip. probability: 32%
  • Precipitation: 0.08"
  • 5:33 am 8:54 pm MDT
WedMay 21.
  • 59°F
  • 37°F
Partly Cloudy
Partly Cloudy
  • Wind: 16mph WNW
  • Humidity: 57%
  • UV index: 6
  • Precip. probability: 24%
  • Precipitation: 0"
  • 5:32 am 8:55 pm MDT
ThuMay 22.
  • 64°F
  • 41°F
Partly Cloudy
Partly Cloudy
  • Wind: 10mph W
  • Humidity: 48%
  • UV index: 6
  • Precip. probability: 18%
  • Precipitation: 0"
  • 5:31 am 8:57 pm MDT
A combination of rain-filled and dull weather is predicted.
Rainfall is predicted for Tuesday through Thursday, Sunday through next Tuesday.
There will be a considerable variation in temperature in the upcoming period. Forecast highs will fluctuate between 46.4°F and 64.4°F, while nighttime temperatures are expected to vary from 33.8°F to 41°F.
Expect the warmest day on next Thursday, with temperatures peaking at 64.4°F; with the highest temperature of 46.4°F, Wednesday will be the coldest day.
Updated: May 13, 2025 @ 13:20:17 UTC
Published by: Weather Atlas | About Us
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Weather Forecasting & Climate
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