Mild
Average highs are around 20°C, so days are mild rather than hot.
September verdict
Lewistown (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 8.4h per day, so bright days are a strong part of the month. Rainfall averages 37mm, which is relatively low for holiday planning.
September weather
Monthly averages
Temp
20°C
Rain
37mm
Sun
8.4h
Weather score
51
Mixed
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 37mm, which is relatively low for holiday planning.
Bright
Sunshine averages 8.4h per day, so bright days are a strong part of the month.
Map
Weather map
Compare Lewistown (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
September37mm average rain
September sits near Lewistown (Montana)'s 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
September8.4 hours average sun
September sits close to Lewistown (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 Lewistown (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 Lewistown (Montana), United States
Marriott
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