Lewistown weather live forecast

Today's maximum temperature in Lewistown is expected to be 22°C. 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 Thursday 18th September 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 Thursday 18th September 2025

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 22°C, maximum UV of 5 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 13 kph from the south-east.

  • 22°C maximum temperature22
    °C maximum temperature
  • 9°C minimum temperature9
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 11 hours of bright sunshine11
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Gentle breeze of 13 kph from the South-East13
    kph wind from SE

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Lewistown weather for Friday 19th September 2025

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 23°C, maximum UV of 5 (Moderate) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 10 kph from the south-east.

  • 23°C maximum temperature23
    °C maximum temperature
  • 10°C minimum temperature10
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 10 hours of bright sunshine10
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Light breeze of 10 kph from the South-East10
    kph wind from SE

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Lewistown weather for Saturday 20th September 2025

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 25°C, maximum UV of 5 (Moderate) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 15 kph from the west.

  • 25°C maximum temperature25
    °C maximum temperature
  • 9°C minimum temperature9
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 9 hours of bright sunshine9
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Gentle breeze of 15 kph from the West15
    kph wind from W

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Lewistown weather for Sunday 21st September 2025

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 26°C, maximum UV of 3 (Moderate) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 24 kph from the west.

  • 26°C maximum temperature26
    °C maximum temperature
  • 10°C minimum temperature10
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 10 hours of bright sunshine10
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 26°C wind chill26
    °C wind chill
  • Moderate breeze of 24 kph from the West24
    kph wind from W

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Lewistown weather for Monday 22nd September 2025

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 18°C, maximum UV of 5 (Moderate) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 24 kph from the west.

  • 18°C maximum temperature18
    °C maximum temperature
  • 6°C minimum temperature6
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 10 hours of bright sunshine10
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 18°C wind chill18
    °C wind chill
  • Moderate breeze of 24 kph from the West24
    kph wind from W

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

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