September · Lithuania
Best time to visit Kaunas in September Weather, crowds & prices
Weather in Kaunas in September
Average temperature 15°C, 30 mm of rain, about 9 days with 6+ hours of sunshine and 83% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
8.4/10
Ranked #1 of 12 months
- Avg temp
- 15°C
- Rainfall
- 30 mm
- Humidity
- 83%
- Days with 6h+ sun
- 9
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$$ · Peak Season Rates ($$$)
September in Kaunas scores 8.4/10 for sightseeing and cultural travel - the single best month of the year. Expect around 15°C, 30 mm of rain, and roughly 9 days with 6+ hours of sunshine this month.
Kaunas mixes interwar modernism, a castle confluence and student nightlife as Lithuania's second city.
September in Kaunas — the year's strongest window
Temperatures hover around 15°C (58°F) — the kind of month where neither heat nor cold forces the schedule.
With around 30 mm of rain, any showers tend to pass through rather than settle in; about 9 days with 6+ hours of sunshine and 12.4 hours of daylight fill the rest.
On our climate-comfort scale this is the top-ranked month of the year for Kaunas at 8.4/10 — the reference point every other month on this page is measured against.
Pack layers you can shed by midday plus one warm layer for the evening.
Expect peak pricing, and crowds are moderate. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Frequently asked
- What is the weather like in Kaunas in September?
- In September, Kaunas averages 15°C, 30 mm of rain, and about 9 days with 6+ hours of sunshine. Its climate-comfort score is 8.4/10.
- Is September a good time to visit Kaunas?
- September earns a 8.4/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Kaunas in September?
- Expect about 30 mm of rain in September. Average humidity is 83% and there are about 9 days with 6+ hours of sunshine.
Curated in Kaunas
Tickets & experiences
Things to do in Kaunas
Kaunas, Lithuania. Live activities and tours from GetYourGuide, matched to this destination.