Great Falls weather live forecast

Today's maximum temperature in Great Falls is expected to be 22°C. Select a day from the live weather forecast for Great Falls, Montana, USA for more weather parameters.

5-day weather forecast updated at 04:01 on Friday 5th September 2025 GMT

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

Great Falls weather forecast by day

Below are the detailed weather forecasts for Great Falls for the next 5 days.

Great Falls weather for Friday 5th September 2025

Expect clear skies in Great Falls, Montana with a maximum temperature of 22°C, maximum UV of 5 (Moderate) and 13 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 17 kph from the north-east.

  • 22°C maximum temperature22
    °C maximum temperature
  • 5°C minimum temperature5
    °C minimum temperature
  • Clear skies
    clear skies
  • 13 hours of bright sunshine13
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • 22°C wind chill22
    °C wind chill
  • Gentle breeze of 17 kph from the North-East17
    kph wind from NE

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Great Falls weather for Saturday 6th September 2025

Expect clear skies in Great Falls, Montana with a maximum temperature of 27°C, maximum UV of 6 (High) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 22 kph from the east.

  • 27°C maximum temperature27
    °C maximum temperature
  • 5°C minimum temperature5
    °C minimum temperature
  • Clear skies
    clear skies
  • 11 hours of bright sunshine11
    hours of sunshine
  • UV (maximum) index 6 (High)6
    UV index (High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • Low heat & humidityL
    low heat & humidity
  • Moderate breeze of 22 kph from the East22
    kph wind from E

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Great Falls weather for Sunday 7th September 2025

Expect scattered clouds in Great Falls, Montana with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 6 (High) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 17 kph from the south-west.

  • 30°C maximum temperature30
    °C maximum temperature
  • 9°C minimum temperature9
    °C minimum temperature
  • Scattered clouds
    scattered clouds
  • 10 hours of bright sunshine10
    hours of sunshine
  • UV (maximum) index 6 (High)6
    UV index (High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • Moderate heat & humidityM
    moderate heat & humidity
  • Gentle breeze of 17 kph from the South-West17
    kph wind from SW

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Great Falls weather for Monday 8th September 2025

Expect scattered clouds in Great Falls, Montana with a maximum temperature of 29°C, low levels of heat & humidity, maximum UV of 5 (Moderate) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 17 kph from the south-west.

  • 29°C maximum temperature29
    °C maximum temperature
  • 12°C minimum temperature12
    °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
  • Low heat & humidityL
    low heat & humidity
  • Gentle breeze of 17 kph from the South-West17
    kph wind from SW

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Great Falls weather for Tuesday 9th September 2025

Expect isolated thunderstorms in Great Falls, Montana with a maximum temperature of 28°C, low levels of heat & humidity, maximum UV of 5 (Moderate) and 7 hours of bright sunshine. There are 0-2 mm of rainfall expected with 33% chance of some rain and a gentle breeze of 19 kph from the north-east.

  • 28°C maximum temperature28
    °C maximum temperature
  • 10°C minimum temperature10
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 7 hours of bright sunshine7
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 33% chance of some rain33
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • Low heat & humidityL
    low heat & humidity
  • Gentle breeze of 19 kph from the North-East19
    kph wind from NE

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

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