Great Falls, Montana, United States Climate Change Severity

67
Very High
The current climate change severity in Great Falls is Very High, with a 28.8% worsening in the climate score compared to last 16 years. This suggests deteriorating conditions, with increasing negative impacts on weather patterns and environmental conditions.
Data: Jan. to Jul. (Historical Vs 2026) - Weather Data Only
Low
020
Moderate
40
High
60
Very High
80
Extreme
100
°C

Great Falls Weather Condition Changes (Historic Vs 2026)

2026
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
Historic
2026

Over the past 16 year(s), Great Falls temperature has changed by around +34.6%, and has experienced notable climate changes.

Sunny
Cloudy
Rainy
Snowy
Misty
Data: Jan. to Jul. (Historical Vs 2026)

Comparison of Weather Condition (Historic Vs 2026)

HistoricDays

Year 2026Days

Change

sunnySunny
4988
79.5%
cloudyCloudy
5119
-62.7%
rainyRainy
7541
-45.3%
snowySnowy
73
-57.1%
mistyMisty
17
600%

Disclaimer: Other weather conditions not shown may affect the total day count.

Climate Change Indicators:

Over the past 16 years, Great Falls has experienced measurable shifts in key climate parameters, contributing to the current severity score of 67 (within the Very High severity category). This suggests worsening climate conditions from the previous years. Here’s a breakdown of the specific changes observed:

Severity Score

67/100

Very High

Low
020
Moderate
40
High
60
Very High
80
Extreme
100

From 2010 to 2026, Great Falls experienced significant changes:

Temperature change of

+2.47 °C

Variation in annual rainfall

-17.77 %

Change in average humidity

-10.93 %

PM2.5 levels surged by

-11.65 %

Heatwave changed by

+3 Days

Coldwave changed by

-7 Days

Wind speeds changed by

+4.07 km/h

These indicators show a dramatic increase in volatility and worsening conditions. Great Falls's Very High severity status requires urgent and immediate adaptation and mitigation strategies, particularly focused on managing extreme weather events, improving air quality, and ensuring water resources are adequate for the population.

Check how we calculate Climate Change Severity
Based on data from Jan. to Jul.

Great Falls Weather Forecast 30 Days (August - September 2026)
Great Falls, Montana, United States

Condition
Temperature IconTemperature
Humidity IconHumi.
Wind IconWind Speed
Thu. 13, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon17°/13°
Humidity Icon84%
Wind Icon18.7km/h
Fri. 14, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon17°/12°
Humidity Icon79%
Wind Icon14.8km/h
Sat. 15, Aug.
sunnySunny
Temperature Icon28°/13°
Humidity Icon52%
Wind Icon19.4km/h
Sun. 16, Aug.
sunnySunny
Temperature Icon30°/15°
Humidity Icon42%
Wind Icon19.8km/h
Mon. 17, Aug.
sunnySunny
Temperature Icon28°/16°
Humidity Icon51%
Wind Icon28.8km/h
Tue. 18, Aug.
partly cloudyPartly Cloudy
Temperature Icon20°/13°
Humidity Icon69%
Wind Icon14km/h
Wed. 19, Aug.
sunnySunny
Temperature Icon26°/12°
Humidity Icon46%
Wind Icon10.4km/h
Thu. 20, Aug.
sunnySunny
Temperature Icon30°/15°
Humidity Icon29%
Wind Icon15.1km/h
Fri. 21, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon28°/14°
Humidity Icon44%
Wind Icon19.6km/h
Sat. 22, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon27°/14°
Humidity Icon43%
Wind Icon21.9km/h
Sun. 23, Aug.
moderate or heavy rain showerRain Showers
Temperature Icon27°/14°
Humidity Icon43%
Wind Icon23.1km/h
Mon. 24, Aug.
moderate rain at timesRain
Temperature Icon26°/13°
Humidity Icon41%
Wind Icon22.2km/h
Tue. 25, Aug.
moderate rain at timesRain
Temperature Icon27°/13°
Humidity Icon40%
Wind Icon16.9km/h
Wed. 26, Aug.
patchy rain possibleRain Possible
Temperature Icon28°/13°
Humidity Icon39%
Wind Icon19.9km/h
Thu. 27, Aug.
patchy rain possibleRain Possible
Temperature Icon28°/14°
Humidity Icon36%
Wind Icon21.1km/h
Fri. 28, Aug.
patchy rain possibleRain Possible
Temperature Icon28°/13°
Humidity Icon37%
Wind Icon18.8km/h
Sat. 29, Aug.
moderate rain at timesRain
Temperature Icon28°/14°
Humidity Icon40%
Wind Icon20km/h
Sun. 30, Aug.
moderate rain at timesRain
Temperature Icon27°/14°
Humidity Icon41%
Wind Icon21.4km/h
Mon. 31, Aug.
patchy rain possibleRain Possible
Temperature Icon27°/13°
Humidity Icon39%
Wind Icon21.9km/h
Tue. 1, Sep.
patchy rain possibleRain Possible
Temperature Icon28°/13°
Humidity Icon39%
Wind Icon22.9km/h
Wed. 2, Sep.
patchy rain possibleRain Possible
Temperature Icon28°/13°
Humidity Icon36%
Wind Icon23km/h
Thu. 3, Sep.
moderate rain at timesRain
Temperature Icon27°/13°
Humidity Icon38%
Wind Icon20.6km/h
Fri. 4, Sep.
moderate or heavy rain showerRain Showers
Temperature Icon24°/13°
Humidity Icon42%
Wind Icon20.9km/h
Sat. 5, Sep.
moderate or heavy rain showerRain Showers
Temperature Icon26°/11°
Humidity Icon40%
Wind Icon19.6km/h
Sun. 6, Sep.
moderate rain at timesRain
Temperature Icon25°/12°
Humidity Icon42%
Wind Icon18.8km/h
Mon. 7, Sep.
moderate rain at timesRain
Temperature Icon25°/11°
Humidity Icon42%
Wind Icon19.7km/h
Tue. 8, Sep.
moderate or heavy rain showerRain Showers
Temperature Icon25°/11°
Humidity Icon41%
Wind Icon21.9km/h
Wed. 9, Sep.
moderate or heavy rain showerRain Showers
Temperature Icon23°/11°
Humidity Icon47%
Wind Icon20.7km/h
Thu. 10, Sep.
moderate rain at timesRain
Temperature Icon24°/11°
Humidity Icon46%
Wind Icon21.5km/h
Fri. 11, Sep.
moderate rain at timesRain
Temperature Icon23°/10°
Humidity Icon47%
Wind Icon20km/h
Sat. 12, Sep.
heavy rain at timesHeavy Rain
Temperature Icon23°/10°
Humidity Icon47%
Wind Icon18.1km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onSun. 16, Aug.

30°C

Low will be onFri. 11, Sep.

10°C

HumidityHumidity

High will be onThu. 13, Aug.

84%

Low will be onThu. 20, Aug.

29%

Wind SpeedWind Speed

High will be onMon. 17, Aug.

28.8km/h

Low will be onWed. 19, Aug.

10.4km/h

PrecipitationPrecipitation

High will be onThu. 13, Aug.

26.5mm

Low will be onSun. 16, Aug.

0.01mm

Ultraviolet IndexUV

High will be onThu. 20, Aug.

8

Low will be onThu. 13, Aug.

1.1

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