Great Falls, MT weather
Today, hourly and 7-day forecast, sunrise and sunset, and the normal climate month by month
Weather in Great Falls now
Loading the National Weather Service forecast…
Great Falls weather by the hour
Great Falls weather for the next 7 days
Source: National Weather Service (NOAA) · forecast for the coordinates of Great Falls.
This week in Great Falls
Sunrise, sunset and moon in Great Falls
What is the weather usually like in Great Falls?
Köppen climate classification, calculated from the 1991–2020 normals
- Julywarmest month · 86°F average high
- Januarycoldest month · 18°F average low
- 15.4 inprecipitation per year · 392 mm
Average high and low temperature (°F)
Average precipitation (inches)
Best time to visit Great Falls: June to September, with mild temperatures and fewer rainy days.
Source: NOAA NCEI U.S. Climate Normals 1991–2020, station GREAT FALLS 16ST, MT US (USC00243749), adjusted for the elevation of Great Falls.
Great Falls weather month by month
Sunrise and sunset in Great Falls through the year
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 8:06 AM | 5:03 PM | 8 h 57 min |
| February | 7:28 AM | 5:50 PM | 10 h 22 min |
| March | 7:35 AM | 7:32 PM | 11 h 56 min |
| April | 6:34 AM | 8:16 PM | 13 h 42 min |
| May | 5:45 AM | 8:57 PM | 15 h 11 min |
| June | 5:25 AM | 9:26 PM | 16 h 0 min |
| July | 5:42 AM | 9:20 PM | 15 h 38 min |
| August | 6:20 AM | 8:39 PM | 14 h 18 min |
| September | 7:01 AM | 7:39 PM | 12 h 37 min |
| October | 7:42 AM | 6:38 PM | 10 h 56 min |
| November | 7:28 AM | 4:50 PM | 9 h 22 min |
| December | 8:04 AM | 4:36 PM | 8 h 31 min |
Times for the 15th of each month, local time (America/Denver).
What is the weather like in Great Falls?
Great Falls has a cold semi-arid climate. The warmest month is July, with an average high of 86°F (30°C), and the coldest is January, with average lows of 18°F (-8°C).
It gets about 15.4 inches (392 mm) of precipitation a year. The wettest month is June and the driest is December.
The best time to visit Great Falls is June to September. At 3,330 ft of elevation, nights are mild most of the year. The live forecast on this page comes from the National Weather Service and the climate averages from NOAA’s 1991–2020 U.S. Climate Normals.
More about Great Falls
Weather in towns near Great Falls
Questions about the weather in Great Falls
What is the hottest month in Great Falls?
July, with an average high of 86°F (30°C).
What is the coldest month in Great Falls?
January, with an average low of 18°F (-8°C).
How much does it rain in Great Falls?
About 15.4 inches (392 mm) a year; the wettest month is June.
Does it snow in Great Falls?
Snow is very rare or not recorded at the nearest weather station.
When is the best time to visit Great Falls?
June to September, when temperatures are most pleasant and rainy days are fewer.
What climate does Great Falls have?
Cold semi-arid (Köppen BSk).
What is the weather like in Great Falls in November?
Highs average 46°F and lows 27°F, with about 0.7 inches of precipitation.
What time is sunrise in Great Falls?
Around 7:28 AM in mid-November, and sunset around 4:50 PM. Today’s exact times are shown above.
Where does this Great Falls weather forecast come from?
From the National Weather Service (NOAA), the official U.S. weather agency, for the exact coordinates of Great Falls.
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