September is an excellent shoulder month with comfortable temperatures, thinning crowds and active harvest events in wine regions. It's a good time for hiking and city tours with generally stable weather. Beach season winds down but late-September can still be pleasant.
Average daily low and high (°C) and monthly rainfall, from each country's largest city. The badge shows how it feels, allowing for humidity.
Average temperature across Eastern Europe in September.
Estonia, Latvia & Lithuania
By late autumn the first frosts return and days shorten noticeably; Tallinn often has chilly, gray weather with winds off the Gulf, while inland areas see more persistent frosts at night. Museums and cafés feel cozier and hotel rates drop outside school holidays, but outdoor sightseeing can be damp and blustery. Waterproof footwear and a warm midlayer will keep you comfortable for shorter daylight excursions.
Poland & Belarus
By late autumn persistent winds and rain can dominate, turning the plains gray and chilly; November often sees the first snowfalls at month’s end. City sightseeing is quieter and hotel prices fall outside holiday windows, but daylight is short and conditions can feel damp. Waterproof boots, a warm coat and an umbrella are practical for walking tours and museum hopping.
southern Poland, Slovakia, western Ukraine & Romania
Late autumn brings the first permanent snowfalls on higher ridges and a rapid drop in temperatures; lower valleys see misty mornings and damp days that can make trails slippery. Many mountain huts reduce services after mid-October, so plan logistics carefully if traveling off-peak. Insulated footwear and waterproofs are essential if you intend to remain active outdoors.
central & eastern Ukraine, Moldova
Late autumn cools quickly, with more frequent rain and the first frosts appearing by November across the plains; overcast days become common and daylight shortens. Rural roads can become muddy while cities shift indoor with café life and museum visits. A warm coat, waterproof footwear and an umbrella are practical for sightseeing and travel between towns.
Romania, Bulgaria & southern Ukraine
Late autumn cools noticeably with more frequent rain and the first frosts inland by November; seaside towns become quieter and off-season prices fall. Bird migration creates activity in the Danube Delta while cultural attractions in Constanța and Varna remain open. Pack waterproof layers and warm clothing for blustery coastal walks and birding trips.
St. Petersburg, Moscow & surrounding regions
Late autumn brings shorter days and increased rainfall, with the first snowfalls often arriving by November and changing city streets to slush and ice. Heating is on in public spaces and transport runs to winter timetables; plan for earlier museum and theatre nights as outdoor time becomes briefer. Insulated footwear and waterproof outer layers are necessary for exploring iconic boulevards.
Autumn harvest events and wine festivals in viticultural regions.
See how September compares with the rest of the year, then read the full guide.