Czech Republic in September: Weather, Crowds & What to Expect

Prague & Central Bohemia

September often feels like a second spring: comfortable daytime temperatures around 16-22°C and cooler, crisp mornings make it excellent for sightseeing and nearby château visits like Karlštejn. Vineyards in Central Bohemia begin to show autumn colour, and harvest events start in smaller towns; the city is noticeably less crowded than mid-summer. Bring a sweater for evening riverside walks and a mid-weight jacket for gusty days.

South Bohemia & Šumava

September cools pleasantly; vineyard terraces and alder-lined streams take on hints of gold, while hiking is comfortable with daily highs around 15-20°C. Autumn colours start to appear later in the month in the higher Šumava forests, making this an excellent time for multi-day treks without peak-season crowds. Some rural attractions close for the low season late in the month; bring layered clothing and waterproof footwear for leaf-slick trails.

Northern Bohemia & Krkonoše (Mountains)

September’s cooling brings clear skies and crisper air-excellent conditions for long-distance hikes and panoramic views from Sněžka. Daytime temperatures are mild but mornings may be frosty at altitude; autumn colours begin lower down later in the month. Crowds thin dramatically after August, making it ideal for quieter mountain routes and lower-rate accommodation; bring warmer layers for chilly nights.

Bohemian-Moravian Highlands (Vysočina) & South Bohemian Uplands

September cools to pleasant, crisp conditions and is ideal for photography and quieter walks through beech forests as leaves begin to turn. Daytime highs often remain in the mid-teens, perfect for vineyard and orchard visits in the southern fringe. Many hiking routes remain accessible but check for early autumn rains; pack layers and waterproof footwear for leaf-slick paths.

South Moravia (Brno, Pálava, Lednice)

September is harvest time in South Moravia-vineyard activity ramps up, grape-picking events and cellar festivals make the countryside lively and photogenic. Daytime temperatures are comfortable (18-24°C) and evenings cool, perfect for outdoor dining among vine rows. Booking accommodation early for harvest-themed weekends is wise; bring layers for cool nights and shoes suitable for mud in active vineyards.

Moravian-Silesian Beskids & Jeseníky (Eastern Mountains)

September cools gradually and offers clear, crisp air and diminishing crowds - ideal for long hikes and photography of autumn colour on beech and spruce slopes. Daytime temperatures are comfortable while nights turn chilly; many mountain refuges remain open but start to reduce services late in the month. Bring warm layers for evening and early starts, and consider booking popular routes to ensure refuge beds.