Mild
Average highs are around 20°C, so days are mild rather than hot.
September verdict
Montana, United States in September
Weather score51Mixed
Mixed for holiday weather
Average highs are around 20°C, so days are mild rather than hot. Sunshine averages 8.5h per day, so bright days are a strong part of the month. Rainfall averages 36mm, which is relatively low for holiday planning.
September weather
Monthly averages
Temp
20°C
Rain
36mm
Sun
8.5h
Weather score
51
Mixed
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 36mm, which is relatively low for holiday planning.
Bright
Sunshine averages 8.5h per day, so bright days are a strong part of the month.
Map
Weather map
Compare Montana, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September20°C average high
September sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsJune to August
This stretch sets the upper range for average daytime heat.
Rain
September36mm average rain
September sits near Montana's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJanuary to April and September to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September8.5 hours average sun
September sits close to Montana's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsJune to August
This stretch has the strongest sunshine in the monthly averages.
Weather score
September51 weather score
September sits close to Montana's yearly weather-score average, giving a typical overall read on the month.
Best weather monthsJuly to August
These months have the strongest weather score in the monthly averages.
Hotels near Montana, United States
Marriott
SpringHill Suites by Marriott Great FallsGreat Falls, Montana, USA
TownePlace Suites by Marriott Great FallsGreat Falls, Montana, USA
Fairfield Inn & Suites Livingston YellowstoneLivingston, Montana, USA
Residence Inn HelenaHelena, Montana, USA
Delta Hotels Helena ColonialHelena, Montana, USA
Fairfield by Marriott Inn & Suites Helena NorthHelena, Montana, USA