Cool
Average highs are around 17°C, so pack for cooler days.
September verdict
Poor for holiday weather
Average highs are around 17°C, so pack for cooler days. Sunshine averages 4.9h per day, so this is not one of the brighter months. Rainfall averages 58mm, which is relatively low for holiday planning.

Monthly averages
Temp
17°C
Rain
58mm
Sun
4.9h
Weather score
35
Poor
Cool
Average highs are around 17°C, so pack for cooler days.
Drier
Rainfall averages 58mm, which is relatively low for holiday planning.
Limited sun
Sunshine averages 4.9h per day, so this is not one of the brighter months.
Map
Compare Kaunas, Lithuania with nearby places by weather score, rain, sun, temperature, and swim conditions.
September17°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.
September58mm average rain
September sits near Kaunas' yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJanuary to May and October to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
September4.9 hours average sun
September sits close to Kaunas' yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsMay to August
This stretch has the strongest sunshine in the monthly averages.
September35 weather score
September sits close to Kaunas' yearly weather-score average, giving a typical overall read on the month.
Best weather monthsJune to August
These months have the strongest weather score in the monthly averages.