Warm
Average highs sit around 28°C, giving warm days by monthly-average standards.
Weather Guide
Great Falls, Montana, United States Average Monthly Weather
Weather score49Mixed annual avg
Best months: July, August, June
Across the year, average daytime temperatures are around 13°C, sunshine averages 7.4h per day, and rainfall totals about 372mm.
Annual weather
Annual averages
Temp
13°C
Rain
372mm
Annual total
Sun
7.4h
Weather score
49
Mixed avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 34mm, which is relatively low for holiday planning.
Bright
Sunshine averages 12h per day, so bright days are a strong part of the month.
Map
Weather map
Compare Great Falls, Montana, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
July28°C average high
July is one of Great Falls' warmest months, with daytime heat above the yearly average.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
July34mm average rain
July sits near Great Falls' yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJanuary to April and July to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
July12 hours average sun
July is one of Great Falls' sunniest months, with some of the strongest bright-day conditions in the yearly averages.
Brightest monthsJune to August
This stretch has the strongest sunshine in the monthly averages.
Weather score
July81 weather score
July is one of Great Falls' best weather-score months, combining the strongest overall balance in the yearly averages.
Best weather monthsJuly to August
These months have the strongest weather score in the monthly averages.
