Mild
Average highs are around 21°C, so days are mild rather than hot.
September verdict
Williston, North Dakota, United States in September
Weather score53Mixed
Mixed for holiday weather
Average highs are around 21°C, so days are mild rather than hot. Sunshine averages 8h 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
21°C
Rain
36mm
Sun
8h
Weather score
53
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 8h per day, so bright days are a strong part of the month.
Map
Weather map
Compare Williston, North Dakota, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September21°C average high
September sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsMay to September
This stretch sets the upper range for average daytime heat.
Rain
September36mm average rain
September sits near Williston's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJanuary to April and August to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September8 hours average sun
September sits close to Williston'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
September53 weather score
September sits close to Williston'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.
