Lewistown weather live forecast

Today's maximum temperature in Lewistown is expected to be 81°F. Select a day from the live weather forecast for Lewistown, Montana, USA for more weather parameters.

5-day weather forecast updated at 04:04 on Tuesday 26th August 2025 GMT

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The 5-day weather forecast for Montana (Lewistown) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Lewistown weather forecast by day

Below are the detailed weather forecasts for Lewistown for the next 5 days.

Lewistown weather for Tuesday 26th August 2025

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 81°F, low levels of heat & humidity, maximum UV of 7 (High) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 11 mph from the south-east.

  • 81°F maximum temperature81
    °F maximum temperature
  • 54°F minimum temperature54
    °F minimum temperature
  • Scattered clouds
    scattered clouds
  • 10 hours of bright sunshine10
    hours of sunshine
  • UV (maximum) index 7 (High)7
    UV index (High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • Low heat & humidityL
    low heat & humidity
  • Gentle breeze of 11 mph from the South-East11
    mph wind from SE

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Lewistown weather for Wednesday 27th August 2025

Expect broken clouds in Lewistown, Montana with a maximum temperature of 79°F, maximum UV of 7 (High) and 1 hour of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 14 mph from the east.

  • 79°F maximum temperature79
    °F maximum temperature
  • 54°F minimum temperature54
    °F minimum temperature
  • Broken clouds
    broken clouds
  • 1 hour of bright sunshine1
    hour of sunshine
  • UV (maximum) index 7 (High)7
    UV index (High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 79°F wind chill79
    °F wind chill
  • Moderate breeze of 14 mph from the East14
    mph wind from E

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Lewistown weather for Thursday 28th August 2025

Expect mostly cloudy with light rain in Lewistown, Montana with a maximum temperature of 72°F, maximum UV of 7 (High) and 1 hour of bright sunshine. There are 2-5 mm of rainfall expected with 57% chance of some rain and a gentle breeze of 10 mph from the south-east.

  • 72°F maximum temperature72
    °F maximum temperature
  • 57°F minimum temperature57
    °F minimum temperature
  • Mostly cloudy with light rain
    mostly cloudy with light rain
  • 1 hour of bright sunshine1
    hour of sunshine
  • UV (maximum) index 7 (High)7
    UV index (High)
  • 57% chance of some rain57
    % chance of some rain
  • 2-5 mm of rainfall expected<5
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Gentle breeze of 10 mph from the South-East10
    mph wind from SE

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Lewistown weather for Friday 29th August 2025

Expect sunshine and showers in Lewistown, Montana with a maximum temperature of 68°F, maximum UV of 3 (Moderate) and 8 hours of bright sunshine. There are 10-20 mm of rainfall expected with 56% chance of some rain and a gentle breeze of 8 mph from the north.

  • 68°F maximum temperature68
    °F maximum temperature
  • 54°F minimum temperature54
    °F minimum temperature
  • Sunshine and showers
    sunshine and showers
  • 8 hours of bright sunshine8
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 56% chance of some rain56
    % chance of some rain
  • 10-20 mm of rainfall expected<20
    mm of rainfall expected
  • 68°F wind chill68
    °F wind chill
  • Gentle breeze of 8 mph from the North8
    mph wind from N

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Lewistown weather for Saturday 30th August 2025

Expect isolated thunderstorms in Lewistown, Montana with a maximum temperature of 72°F, maximum UV of 7 (High) and 5 hours of bright sunshine. There are 2-5 mm of rainfall expected with 28% chance of some rain and a gentle breeze of 8 mph from the south-east.

  • 72°F maximum temperature72
    °F maximum temperature
  • 52°F minimum temperature52
    °F minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 5 hours of bright sunshine5
    hours of sunshine
  • UV (maximum) index 7 (High)7
    UV index (High)
  • 28% chance of some rain28
    % chance of some rain
  • 2-5 mm of rainfall expected<5
    mm of rainfall expected
  • 72°F wind chill72
    °F wind chill
  • Gentle breeze of 8 mph from the South-East8
    mph wind from SE

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