What’s the climate like in Great Falls?
The current climate of Great Falls features average monthly temperatures ranging from highs of 30°C during the day to lows of 1°C. 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.
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.
On average, Great Falls gets 686 mm of precipitation each year. Of this, about 184 cm is snowfall. For comparison, London gets 701 mm of precipitation each year.
Best time to visit Great Falls?
The best time to visit Great Falls for pleasant to warm weather is July through October. There might be some rain during this period, but the temperatures are just right for exploring Great Falls.
Climate Table of Great Falls
The climate table of Great Falls shows the average temperatures, precipitation, snow, and UV index per month. The table gives an overview of the average day and night temperatures in degrees Celsius, the total amount of precipitation in millimetres, the total snowfall in centimetres, and the UV index for each month. Precipitation 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.
- Average yearly temperature: 15°C
- Highest temperature: 30°C in July
- Lowest temperature: 1°C in February
- Precipitation*: 686 mm per year, averaging 57 mm per month
- Snowfall: 184 cm per year
- Driest months: 20 mm in February, 25 mm in January and December
- Wettest months: 126 mm in June, 121 mm in May and 100 mm in April
*Precipitation is measured as a combination of rain, snow, and hail
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Table of Contents
Average Temperature per Month in Great Falls
This graph shows the average maximum temperatures per month in Great Falls, Montana. The temperatures are shown in degrees Celsius and the average is calculated based on the recorded temperatures per month from past years.
Average Precipitation per Month in Great Falls
This graph shows how much precipitation Great Falls, Montana, gets on average per month. Precipitation is always measured as water, even if it's snow or hail. This makes it easy to compare how much has fallen, regardless of the form of precipitation. The amount of precipitation is measured in millimetres and the average is calculated based on the recorded precipitation per month from past years.
Average Snowfall per Month in Great Falls
This graph shows how much snow Great Falls, Montana, gets on average per month. The amount of snowfall is measured in centimetres and the average is calculated based on the recorded snowfall per month from past years.
Average UV Index per Month in Great Falls
This graph 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.
Yearly Temperature in Great Falls
This graph shows the average yearly temperature in Great Falls, Montana. The yearly temperature, expressed in degrees Celsius, is the average of all twelve monthly temperatures summed up for that year.
Total Yearly Precipitation in Great Falls
This chart shows the total yearly precipitation in Great Falls, Montana, over the past few years. The total yearly precipitation, measured in millimetres, is the sum of all the rain that fell in the twelve months of that year.
Total Yearly Snowfall in Great Falls
This chart shows the total yearly snowfall in Great Falls, Montana, over the past few years. The total yearly snowfall, measured in centimetres, is the sum of all the snow that fell in the twelve months of that year.
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.
