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United StatesThe climate of Great Falls
The current climate in Great Falls features temperatures ranging from a high of 30°C to a low of 1°C throughout the year. The average yearly temperature is around 15°C. At night, temperatures in the colder months average around -10°C and in the warmer months around 13°C.
Average temperatures and precipitation
This chart shows the average monthly maximum and minimum temperatures (in degrees Celsius) and average monthly rainfall (in millimeters) for Great Falls, Montana.
Temperature records
The highest temperature recorded in Great Falls in recent years was 39°C in August 2018. The lowest daytime temperature recorded was -28°C in December 2022.
Precipitation and snowfall
On average, Great Falls gets 686 mm of precipitation each year. Of this, about 184 cm is snowfall. For comparison, New York gets 1142 mm of precipitation each year.
Best time to visit Great Falls?
The best time to visit Great Falls for mild to warm weather is July up to October. You might get some rain, but the temperatures are just right to explore Great Falls.
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Climate Table of Great Falls
The climate table of Great Falls shows the average temperatures, rainfall, snow, and UV index per month. The table provides an overview of the average day and night temperatures in degrees Celsius, the total amount of rainfall in millimeters, the total snowfall in centimeters, and the UV index for each month. Rainfall is always measured as water, even if it's snow or hail.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
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| Temp. max (°C) | 4 | 1 | 8 | 13 | 18 | 24 | 30 | 28 | 22 | 15 | 6 | 2 |
| Temp. min (°C) | -7 | -9 | -4 | 1 | 5 | 10 | 13 | 13 | 8 | 3 | -4 | -8 |
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| Precipitation (mm) | 25 | 20 | 27 | 100 | 121 | 126 | 35 | 51 | 67 | 46 | 43 | 25 |
| Snow (cm) | 24 | 32 | 20 | 18 | 2,9 | 0 | 0 | 0 | 1,6 | 13 | 33 | 40 |
| UV Index | 2 | 2 | 5 | 6 | 6 | 7 | 8 | 7 | 5 | 5 | 2 | 1 |
Click on the month name to see more weather details, like daily averages, temperatures, and precipitation for the past years in that month.
Temperature charts
These charts display the average temperatures in Great Falls, Montana. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Average Temperature per Month in Great Falls
Yearly Temperature in Great Falls
Precipitation charts
These charts show the average amount of precipitation in Great Falls, Montana. Precipitation is always measured as water, even when it falls as snow or hail. The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Average Precipitation per Month in Great Falls
Total Yearly Precipitation in Great Falls
Average Snowfall per Month in Great Falls
Total Yearly Snowfall in Great Falls
UV index chart
This chart shows the average UV index per month in Great Falls, Montana. The UV index indicates the intensity of ultraviolet radiation and ranges from 0 to a maximum of 11.
Average UV Index per Month in Great Falls
Weather experiences in Great Falls
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Average weather in Great Falls by month
Click on a month below to see detailed weather info for Great Falls. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.