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Lewistown, MT 59457 Weather
Current conditions
Forecast for this hour (no station report in the last two hours)
Forecast
10-day-
Today
Sunny. High near 72, with temperatures falling to around 67 in the afternoon. South wind 2 to 10 mph, with gusts as high as 18 mph.
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Tonight
Mostly clear. Low around 45, with temperatures rising to around 49 overnight. South wind 5 to 10 mph.
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Thursday
Mostly sunny. High near 75, with temperatures falling to around 70 in the afternoon. South wind around 5 mph.
National Weather Service forecast updated 3 hrs ago.
Hourly
Hourly forecast- Now36°
- 8 AM39°
- 9 AM43°
- 10 AM53°
- 11 AM58°
- 12 PM65°
- 1 PM68°
- 2 PM69°
- 3 PM71°
- 4 PM69°
- 5 PM67°
- 6 PM65°
- 7 PM59°
- 8 PM56°
- 9 PM55°
- 10 PM54°
- 11 PM53°
- Thu12 AM53°
- 1 AM52°
- 2 AM52°
- 3 AM51°
- 4 AM50°
- 5 AM49°
- 6 AM49°
10-day forecast
Details- TodayOct 21Sunny45°72°
- ThuOct 22Mostly Sunny16%44°75°
- FriOct 23Rain0.5 in snow96%26°52°
- SatOct 24Sunny<0.1 in snow24°42°
- SunOct 25Partly Sunny then Slight Chance Light Snow18%24°42°
- MonOct 26Mostly Sunny13%25°44°
- TueOct 27Slight Chance Rain And Snow24%27°50°
- WedOct 28Snow0.19 in21°33°
- ThuOct 29Mostly sunny25°40°
- FriOct 30Partly cloudy33°49°
Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.
Radar
Full mapWeather news near Lewistown
More weather news-
Precipitation totals as of Oct. 14Editor’s note: Figures for October precipitation were not available from the Lewistown Airport location. Figures are instead from a location 15 miles southwest of the airport. Month to Date: 1.72 inches Last year for…
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Abnormally warm air settles into Montana before big cooldown this weekendMontana is enjoying some unseasonably warm weather this week, with highs reaching the 60s and 70s across much of the state, but a cooldown is on the way. A trough of low pressure moves in Thursday night, bringing heavy…
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A mild weather pattern holds across Montana, with changes set to arrive by end of weekNonstop Local News Montana MONTANA -Ã Continuing through Thursday, much of the state will enjoy partly to mostly sunny skies, with a few light rain showers possible in the afternoon/evening, in areas of high elevation…
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Warming trend brings highs back into the 70s in some of MontanaNonstop Local News Montana El Niño winter conditions ahead include drier and warmer than normal outlooks for Montana This pattern can bring dry, warm weather to the north and stormy, wet, cool weather to the southern…
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Gusty winds expected on Saturday in western MontanaKPAX News Gusty winds expected on Saturday in western Montana A mid-level jet streak will move over northern Montana on Saturday. This will bring stornger winds back to the area, with 30-40 MPH maximum gusts possible…
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Wind and temperatures on the rise for the weekend in MontanaNonstop Local News Montana Today, we saw dense fog in western valleys this morning This yielded to widespread sunshine in the afternoon across the region Highs reached the 50s in most major areas, which is normal for…
Air quality
Air quality is satisfactory, and air pollution poses little or no risk.
Lewistown, MT reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.
Sun & moon
Almanac
MonthlyLewistown Ap, records since 1896. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).
Forecasters' discussion
From the National Weather Service office in TFX, issued 2 hrs ago
Key Messages
- It will be mostly dry across North-central, Central, and Southwestern Montana through the day on Thursday.
- It will be windy across North-central Montana on Friday.
- Widespread precipitation returns late Thursday through Friday.
- Temperatures will be well-above seasonal averages through Thursday with temperatures cooling down Friday through this weekend.
Discussion
/Issued 140 AM MDT Wed Oct 21 2026/
- Meteorological Overview:
Today over Southwestern Montana there remains Southwest flow aloft with weak zonal flow (west-east) over North-central, and Central Montana. Due to slightly stronger warm air advection today temperatures will rebound to above seasonal averages. Across North- central and Central Montana it will be dry with a low chance for showers across Southwestern Montana today. See the Forecast Confidence & Scenarios Section for details. On Thursday there remains southerly flow aloft and an upper-level trough associated with a Pacific Cold front begins to move over North-central, Central, and Southwestern Montana by Thursday evening. This will allow temperatures to remain above seasonal averages with mostly dry weather until Thursday evening. Thursday evening into Friday morning precipitation will gradually spread over North-central, Central, and Southwestern Montana.
On Friday the upper-level trough merges with a shortwave trough moving south from Canada. This combined with the cold front that moved through will bring widespread precipitation and cooler temperatures (below seasonal averages) to the area. Due to the cold front that moved through Thursday evening into Friday morning snow-levels will lower and the precipitation that falls in mountain areas on Friday will transition from rain to snow by Friday evening. On Friday there is an increasing pressure gradient and strong low-level and mid-level winds. This will bring windy conditions to North-central Montana on Friday. On Saturday an upper-level ridge begins to build in over North-central, Central, and Southwestern Montana. This will allow the area to dry out with cool temperatures lingering.
On Sunday the upper-level ridge remains over North-central, Central, and Southwestern Montana. This will keep dry and cool (below seasonal averages) weather for the area on Sunday. Monday through Tuesday an upper-level trough moves over North-central, Central, and Southwestern Montana. This will bring cooler temperatures and widespread precipitation to the area on Monday and Tuesday. -IG
- Forecast Confidence & Scenarios:
Aviation
21/12Z TAF Period
VFR conditions will prevail at all terminals during this TAF Period with primarily light winds and high-level clouds around. At the KWYS terminal between 21/15Z and 21/22Z there is a 15 - 30% chance for rain showers. -IG
Preliminary Point Temps
GTF 73 45 74 42 / 0 0 0 30 CTB 68 39 70 38 / 0 0 0 60 HLN 69 39 71 43 / 10 10 0 40 BZN 67 38 70 40 / 10 0 0 30 WYS 60 29 62 32 / 30 10 10 70 DLN 65 38 66 41 / 20 10 0 80 HVR 69 37 73 40 / 0 0 0 20 LWT 71 45 75 43 / 0 0 0 20
Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Conservative index and reflects what the press published. Terms of use.