Mild
Average highs are around 21°C, so days are mild rather than hot.
September verdict
Mixed for holiday weather
Average highs are around 21°C, so days are mild rather than hot. Sunshine averages 7.5h per day, enough for a balanced month. Rainfall averages 44mm, which is relatively low for holiday planning.
Monthly averages
Temp
21°C
Rain
44mm
Sun
7.5h
Weather score
53
Mixed
Mild
Average highs are around 21°C, so days are mild rather than hot.
Drier
Rainfall averages 44mm, which is relatively low for holiday planning.
Some sun
Sunshine averages 7.5h per day, enough for a balanced month.
Map
Compare Jamestown, North Dakota, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
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.
September44mm average rain
September sits near Jamestown's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJanuary to April and October to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
September7.5 hours average sun
September sits close to Jamestown'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.
September53 weather score
September sits close to Jamestown'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.