Lewistown weather live forecast

Today's maximum temperature in Lewistown is expected to be 9°C. 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 18th October 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 18th October 2025

Expect sunshine and showers in Lewistown, Montana with a maximum temperature of 9°C, maximum UV of 3 (Moderate) and 10 hours of bright sunshine. There are 0-2 mm of rainfall expected with 1% chance of some rain and a moderate breeze of 21 kph from the west.

  • 9°C maximum temperature9
    °C maximum temperature
  • 0°C minimum temperature0
    °C minimum temperature
  • Sunshine and showers
    sunshine and showers
  • 10 hours of bright sunshine10
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 1% chance of some rain1
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • 6°C wind chill6
    °C wind chill
  • Moderate breeze of 21 kph from the West21
    kph wind from W

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Lewistown weather for Sunday 19th October 2025

Expect mostly cloudy with light rain in Lewistown, Montana with a maximum temperature of 11°C, maximum UV of 3 (Moderate) and no hours of bright sunshine. There are 0-2 mm of rainfall expected with 15% chance of some rain and a fresh breeze of 30 kph from the west.

  • 11°C maximum temperature11
    °C maximum temperature
  • 3°C minimum temperature3
    °C minimum temperature
  • Mostly cloudy with light rain
    mostly cloudy with light rain
  • No hours of bright sunshine0
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 15% chance of some rain15
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Fresh breeze of 30 kph from the West30
    kph wind from W

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Lewistown weather for Monday 20th October 2025

Expect mostly cloudy with light rain in Lewistown, Montana with a maximum temperature of 7°C, maximum UV of 2 (Low) and 4 hours of bright sunshine. There are 2-5 mm of rainfall expected with 55% chance of some rain and a fresh breeze of 31 kph from the west.

  • 7°C maximum temperature7
    °C maximum temperature
  • -1°C minimum temperature-1
    °C minimum temperature
  • Mostly cloudy with light rain
    mostly cloudy with light rain
  • 4 hours of bright sunshine4
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 55% chance of some rain55
    % chance of some rain
  • 2-5 mm of rainfall expected<5
    mm of rainfall expected
  • 2°C wind chill2
    °C wind chill
  • Fresh breeze of 31 kph from the West31
    kph wind from W

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Lewistown weather for Tuesday 21st October 2025

Expect clear skies in Lewistown, Montana with a maximum temperature of 14°C, maximum UV of 2 (Low) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 20 kph from the west.

  • 14°C maximum temperature14
    °C maximum temperature
  • -1°C minimum temperature-1
    °C minimum temperature
  • Clear skies
    clear skies
  • 11 hours of bright sunshine11
    hours of sunshine
  • UV (maximum) index 2 (Low)2
    UV index (Low)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Moderate breeze of 20 kph from the West20
    kph wind from W

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Lewistown weather for Wednesday 22nd October 2025

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 14°C, maximum UV of 3 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 25 kph from the south-west.

  • 14°C maximum temperature14
    °C maximum temperature
  • 2°C minimum temperature2
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 8 hours of bright sunshine8
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 14°C wind chill14
    °C wind chill
  • Moderate breeze of 25 kph from the South-West25
    kph wind from SW

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Metric (°C / mm)  |  Imperial (°F / inches)

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