Live Weather & Forecast

Weather in Lewistown

Montana, United States · Real-time conditions & 3-day outlook

Flag of United States
Sunny
15°C
Feels like 15°C
59°F / Feels 59°F
Sunny
Lewistown, Montana
🌞 Daytime
Updated: 2026-04-15 16:45
💧
Humidity
28%
💨
Wind
19.4 km/h SSW
🌬️
Wind Gust
22.4 km/h
🌡️
Pressure
998 mb
👁️
Visibility
9 km
☀️
UV Index
2 (Low)
🌧️
Precipitation
0 mm
☁️
Cloud Cover
11%
💦
Dew Point
-3.5°C
🌐
Wind Degree
209°

Air Quality Index

US EPA: Good UK DEFRA: Low (1)
CO
146.9 μg/m³
NO₂
4.1 μg/m³
O₃
67 μg/m³
SO₂
1 μg/m³
PM 2.5
2.3 μg/m³
PM 10
3.3 μg/m³

Weather Alerts 2

Met · Moderate · Expected
Winter Weather Advisory issued April 14 at 11:11PM MDT until April 16 at 12:00PM MDT by NWS Great Falls MT

* WHAT...Snow expected. Total snow accumulations between 2 and 6 inches. Winds gusting as high as 35 mph. * WHERE...Big Belt, Bridger and Castle Mountains, Little Belt and Highwood Mountains, and Southern Rocky Mountain Front. * WHEN...From 6 PM Wednesday to noon MDT Thursday. * IMPACTS...Slushy snow covered roads may make travel difficult. Falling and or blowing snow may significantly reduce v...

Slow down and use caution while traveling. The latest road conditions can be obtained by calling 5 1 1 or visiting the MDT Road Report website. To see a graphical representation of the degree of stress on young livestock please visit our webpage and select Local Programs then Cold Air Advisory for...

Effective: 2026-04-14T23:11:00-06:00  ·  Expires: 2026-04-15T17:00:00-06:00
Met · Severe · Expected
Winter Storm Warning issued April 14 at 11:11PM MDT until April 17 at 6:00AM MDT by NWS Billings MT

* WHAT...Heavy snow expected. Total snow accumulations 1 to 2 feet. Winds gusting as high as 55 mph. * WHERE...Crazy Mountains. * WHEN...From noon Wednesday to 6 AM MDT Friday. * IMPACTS...Recreation in the high country will be impacted by heavy accumulating snow. Widespread blowing snow could significantly reduce visibility. Avalanche danger may increase. * ADDITIONAL DETAILS...Highest snow t...

Recreation in the backcountry will be hazardous due to falling and blowing snow. Be alert for the possibility of increased avalanche conditions.

Effective: 2026-04-14T23:11:00-06:00  ·  Expires: 2026-04-15T23:15:00-06:00

Today's Hourly Forecast

24-hour breakdown for Lewistown, Montana

12 AM
Clear
7°
Clear
💧 44% 💨 6.8 km/h
1 AM
Clear
7°
Clear
💧 43% 💨 7.2 km/h
2 AM
Clear
6°
Clear
💧 47% 💨 6.8 km/h
3 AM
Clear
5°
Clear
💧 54% 💨 5.8 km/h
4 AM
Clear
5°
Clear
💧 59% 💨 4.7 km/h
5 AM
Clear
4°
Clear
💧 61% 💨 4 km/h
6 AM
Clear
5°
Clear
💧 54% 💨 4.7 km/h
7 AM
Sunny
6°
Sunny
💧 55% 💨 5.8 km/h
8 AM
Sunny
7°
Sunny
💧 49% 💨 5.4 km/h
9 AM
Sunny
8°
Sunny
💧 45% 💨 9.4 km/h
10 AM
Sunny
10°
Sunny
💧 42% 💨 15.1 km/h
11 AM
Sunny
12°
Sunny
💧 39% 💨 15.8 km/h
12 PM
Partly Cloudy
13°
Partly Cloudy
💧 35% 💨 19.4 km/h
1 PM
Partly Cloudy
15°
Partly Cloudy
💧 29% 💨 24.5 km/h
2 PM
Sunny
15°
Sunny
💧 26% 💨 25.6 km/h
3 PM
Sunny
15°
Sunny
💧 27% 💨 22.3 km/h
4 PM
Sunny
15°
Sunny
💧 28% 💨 19.4 km/h
5 PM
Sunny
15°
Sunny
💧 31% 💨 16.2 km/h
6 PM
Sunny
14°
Sunny
💧 33% 💨 13.7 km/h
7 PM
Patchy rain nearby
12°
Patchy rain nearby
💧 56% 💨 6.5 km/h 🌧️ 100%
8 PM
Patchy rain nearby
10°
Patchy rain nearby
💧 73% 💨 2.5 km/h 🌧️ 62%
9 PM
Patchy rain nearby
9°
Patchy rain nearby
💧 77% 💨 8.3 km/h 🌧️ 100%
10 PM
Clear
8°
Clear
💧 79% 💨 11.9 km/h
11 PM
Patchy rain nearby
6°
Patchy rain nearby
💧 79% 💨 11.5 km/h 🌧️ 100%

3-Day Forecast

Daily overview for Lewistown, Montana

Today
Patchy rain nearby
Patchy rain nearby
16° / 4°
🌧️ 84% chance of rain
💧 Avg. humidity: 48%
💨 Max wind: 25.6 km/h
🌧️ Total precip: 0.36 mm
☀️ UV Index: 0.8
🌅 Sunrise: 06:29 AM
🌇 Sunset: 08:07 PM
🌙 Waning Crescent
🌑 Moon: 8% lit
Thu, Apr 16
Patchy moderate snow
Patchy moderate snow
3° / -5°
🌧️ 88% chance of rain
❄️ 3% chance of snow
💧 Avg. humidity: 61%
💨 Max wind: 32.4 km/h
🌧️ Total precip: 0.51 mm
☀️ UV Index: 1
🌅 Sunrise: 06:28 AM
🌇 Sunset: 08:08 PM
🌙 Waning Crescent
🌑 Moon: 3% lit
Fri, Apr 17
Sunny
Sunny
5° / -6°
🌧️ 0% chance of rain
💧 Avg. humidity: 52%
💨 Max wind: 27.7 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.2
🌅 Sunrise: 06:26 AM
🌇 Sunset: 08:10 PM
🌙 New Moon
🌑 Moon: 0% lit

Best Time to Visit Lewistown

Plan your trip to Lewistown, United States around the most favorable weather conditions.

Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
← Back to Lewistown 🗓 View Holidays 2026

Frequently Asked Questions

What is the current weather in Lewistown?
Current conditions in Lewistown: Sunny, temperature 15°C, humidity 28%.
What is the best time to visit Lewistown?
The best time to visit Lewistown is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Lewistown?
Lewistown is located at approximately 47.1° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Lewistown?
The wettest period in Lewistown is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Lewistown?
For visits to Lewistown during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Lewistown in?
Lewistown is located in United States, in the state of Montana.
What are the public holidays in Lewistown in 2026?
View the 2026 public holidays for Lewistown on our Holidays page.
What are the GPS coordinates used for the weather forecast in Lewistown?
The weather forecast for Lewistown uses coordinates 47.0639, -109.4282.