Karlovy Vary weather by month
The best time to visit Karlovy Vary is June to August — 93/100 in June, 24°C and 13 rainy days. The best season is summer, June to August (91/100 on average).
The worst month is January at 40/100 — freezing, a little rain, clean air. See January →
Updated September 2026 · climate normals from ERA5 reanalysis
Planning the wider trip? Best time to visit Czechia →
Best season: June to August (91/100 on average) · worst January (40/100)
- Days
- 24°C
- Nights
- 11°C
- Wet days
- 13
- Sun
- 11.8 h
- Humidity
- 72%
- Daylight
- 16 h

Karlovy Vary, month by month
Comfort score out of 100 for the kind of trip Karlovy Vary is best for, the average high, rainy days and hours of sun a day from the climate normals, and how busy it tends to be.
What's on in Karlovy Vary through the year
Festivals, natural spectacles, holidays and the seasons to watch out for — curated and sourced. The month pages carry the detail.
- March
- Easter3–6 AprHoliday
- April
- Opening of the spa season28 Apr – 4 May (usually)Festival
- July
- Karlovy Vary Film Festival1–13 Jul (usually)Festival
- August
- Karlovy Vary Folklore Festival2–6 SepFestival
- September
- Dvorak Autumn5–30 Sep (usually)Festival
- October
- Karlovy Vary Jazzfest1–15 Oct (usually)Festival
- November
- Christmas in Karlovy Vary29 Nov – 1 JanHoliday
Crowds in Karlovy Vary in June
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Busyschool holidays in 4 of the markets that fill it, one of its best months for weather(estimated)
Peak crowdsBusyShoulder seasonQuiet
Traveller notes on Karlovy Vary
What people who have been say about the place — the year-round notes first, then month by month.
Forum posters describe January in Karlovy Vary as consistently cold, often with snow on the ground, similar to the conditions typical of December. One visitor specifically cited temperatures around -10C early in the morning on one of the town's bridges, describing the experience as genuinely wintry but still enjoyable with the right gear. Posters describe the funicular area up above the spa town as a real winter-wonderland highlight when snow is on the ground. Posters do flag that some attractions and businesses run reduced hours or close entirely during the quieter January off-season. Posters generally recommend layered clothing and warm, sturdy shoes as essential January packing. Posters generally rate January as cold and snow-capable but atmospheric for a Karlovy Vary visit, with some seasonal closures to plan around.
Forum regulars note that Karlovy Vary runs noticeably cooler than Prague in summer, which is part of why it's popular as a July escape. The spa culture is central to any visit - around a hundred mineral springs feed the colonnades, with water temperatures from 30 to 73C - but posters are split on the paid spa experiences themselves: some recommend booking ahead since the well-known hotels get busy in peak season, while others warn not to build a trip around trying the treatments, calling some options disappointing for the price. Walking the colonnades and sipping from a spa cup remains the free, universally-recommended activity regardless.
Add your own note from Karlovy Vary's card on the map.