Lewistown, MT Weather Forecast
Local 7-day forecast
Mostly Clear
Track current conditions, temperature changes, wind, and the full daily outlook for Lewistown, MT in one place.
Mostly clear. Low around 28, with temperatures rising to around 32 overnight. South wind around 6 mph.
Local Weather Overview
This forecast page for Lewistown, MT is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Apr 19, 2026 7:14 AM MDT.
The active forecast window currently covers Apr 19 to Apr 25, 2026 for Lewistown, MT.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Apr 19 to Apr 25, 2026
- Latest sync
- Apr 19, 2026 7:14 AM MDT
- Forecast office
- TFX
- Source
- NOAA / NWS
Daily Outlook
This Week in Lewistown
Tuesday looks like the warmest upcoming period in Lewistown at 78 degrees F.
Friday Night is the coolest period ahead with temperatures near 20 degrees F.
The strongest winds are forecast for Thursday at about 30 to 33 mph NW.
Precipitation is mentioned in 7 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 19, 2026 7:14 AM MDT
- Coverage
- 7 days
- Time zone
- America/Denver
- Forecast office
- TFX
- Radar station
- KBLX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Sunny, with a high near 65. South southwest wind around 6 mph.
Partly cloudy. Low around 40, with temperatures rising to around 43 overnight. South southwest wind 6 to 10 mph.
Mostly sunny, with a high near 72. West wind around 7 mph.
Partly cloudy, with a low around 44. Southeast wind around 7 mph.
Mostly sunny, with a high near 78. South southwest wind around 8 mph.
Mostly cloudy, with a low around 50. South southeast wind around 10 mph.
Showers and thunderstorms likely after noon. Partly sunny, with a high near 70. Southwest wind 9 to 16 mph, with gusts as high as 25 mph.
Showers and thunderstorms before midnight, then rain between midnight and 3am, then rain and snow. Cloudy, with a low around 28.
Snow likely. Mostly cloudy, with a high near 39. New snow accumulation of 2 to 4 inches possible.
A chance of snow. Mostly cloudy, with a low around 23. New snow accumulation of less than half an inch possible.
A chance of snow. Partly sunny, with a high near 39.
A slight chance of snow. Mostly cloudy, with a low around 20.
A slight chance of snow. Partly sunny, with a high near 40.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Apr 19
|
Mostly Clear
|
28°F |
6 mph
S
|
|
Sunday
Apr 19
|
Sunny
|
65°F |
6 mph
SSW
|
|
Sunday Night
Apr 19
|
Partly Cloudy
|
40°F |
6 to 10 mph
SSW
|
|
Monday
Apr 20
|
Mostly Sunny
|
72°F |
7 mph
W
|
|
Monday Night
Apr 20
|
Partly Cloudy
|
44°F |
7 mph
SE
|
|
Tuesday
Apr 21
|
Mostly Sunny
|
78°F |
8 mph
SSW
|
|
Tuesday Night
Apr 21
|
Mostly Cloudy
|
50°F |
10 mph
SSE
|
|
Wednesday
Apr 22
|
Partly Sunny then Showers And Thunderstorms Likely
|
70°F |
9 to 16 mph
SW
|
|
Wednesday Night
Apr 22
|
Showers And Thunderstorms then Rain And Snow
|
28°F |
18 to 28 mph
WNW
|
|
Thursday
Apr 23
|
Snow Likely
|
39°F |
30 to 33 mph
NW
|
|
Thursday Night
Apr 23
|
Chance Light Snow
|
23°F |
14 to 25 mph
NW
|
|
Friday
Apr 24
|
Chance Light Snow
|
39°F |
17 mph
NW
|
|
Friday Night
Apr 24
|
Slight Chance Light Snow
|
20°F |
7 to 16 mph
NW
|
|
Saturday
Apr 25
|
Slight Chance Light Snow
|
40°F |
7 to 10 mph
NW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Lewistown.
Nearby forecast pages are not available for this location yet.
