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 04:03 on Saturday 26th July 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 Saturday 26th July 2025

Expect isolated thunderstorms 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 30-40 mm of rainfall expected with 61% chance of some rain and a gentle breeze of 9 mph from the south-east.

  • 81°F maximum temperature81
    °F maximum temperature
  • 59°F minimum temperature59
    °F minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 10 hours of bright sunshine10
    hours of sunshine
  • UV (maximum) index 7 (High)7
    UV index (High)
  • 61% chance of some rain61
    % chance of some rain
  • 30-40 mm of rainfall expected<40
    mm of rainfall expected
  • Low heat & humidityL
    low heat & humidity
  • Gentle breeze of 9 mph from the South-East9
    mph wind from SE

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Lewistown weather for Sunday 27th July 2025

Expect isolated thunderstorms in Lewistown, Montana with a maximum temperature of 79°F, maximum UV of 7 (High) and 10 hours of bright sunshine. There are 0-2 mm of rainfall expected with 31% chance of some rain and a gentle breeze of 9 mph from the south.

  • 79°F maximum temperature79
    °F maximum temperature
  • 59°F minimum temperature59
    °F minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 10 hours of bright sunshine10
    hours of sunshine
  • UV (maximum) index 7 (High)7
    UV index (High)
  • 31% chance of some rain31
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Gentle breeze of 9 mph from the South9
    mph wind from S

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Lewistown weather for Monday 28th July 2025

Expect isolated thunderstorms in Lewistown, Montana with a maximum temperature of 75°F, maximum UV of 5 (Moderate) and 7 hours of bright sunshine. There are 0-2 mm of rainfall expected with 66% chance of some rain and a gentle breeze of 9 mph from the east.

  • 75°F maximum temperature75
    °F maximum temperature
  • 57°F minimum temperature57
    °F minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 7 hours of bright sunshine7
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 66% chance of some rain66
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Gentle breeze of 9 mph from the East9
    mph wind from E

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Lewistown weather for Tuesday 29th July 2025

Expect isolated thunderstorms in Lewistown, Montana with a maximum temperature of 75°F, maximum UV of 5 (Moderate) and 8 hours of bright sunshine. There are 2-5 mm of rainfall expected with 66% chance of some rain and a gentle breeze of 11 mph from the east.

  • 75°F maximum temperature75
    °F maximum temperature
  • 57°F minimum temperature57
    °F minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 8 hours of bright sunshine8
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 66% chance of some rain66
    % chance of some rain
  • 2-5 mm of rainfall expected<5
    mm of rainfall expected
  • 75°F wind chill75
    °F wind chill
  • Gentle breeze of 11 mph from the East11
    mph wind from E

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Lewistown weather for Wednesday 30th July 2025

Expect isolated thunderstorms in Lewistown, Montana with a maximum temperature of 75°F, maximum UV of 8 (Very High) and 1 hour of bright sunshine. There are 10-20 mm of rainfall expected with 65% chance of some rain and a moderate breeze of 14 mph from the east.

  • 75°F maximum temperature75
    °F maximum temperature
  • 57°F minimum temperature57
    °F minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 1 hour of bright sunshine1
    hour of sunshine
  • UV (maximum) index 8 (Very High)8
    UV index (Very High)
  • 65% chance of some rain65
    % chance of some rain
  • 10-20 mm of rainfall expected<20
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Moderate breeze of 14 mph from the East14
    mph wind from E

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