Vienna in September

When to go

GeoSphere Austria's most recent climate normals for the Hohe Warte station list moderate daytime highs and cooler nights for September, so pack layers for the gap between afternoon and evening, and the same normals list a monthly precipitation sum and rain days. The Federal Monuments Authority says its monument day takes place across Austria on the last Sunday of the month, and the Vienna Tourist Board lists the Sunday Mass at the Imperial Chapel as running from mid-September. The Tourist Board also notes that wine taverns are especially pleasant when guests can sit outside, so check each tavern's opening dates.

Trip facts

• GeoSphere Austria's 1991–2020 climate normals for the Wien Hohe Warte station list, for September, a mean of all daily maximum temperatures of 21.1 °C and a mean of all daily minimum temperatures of 12 °C. (klimaportal.geosphere.at, checked 2026-10-15)
• GeoSphere Austria's 1991–2020 climate normals for the Wien Hohe Warte station list a September precipitation sum of 64.1 mm and 7.4 days with precipitation of at least 1 mm. (klimaportal.geosphere.at, checked 2026-10-15)
• The Federal Monuments Authority's Tag des Denkmals site says the monument day takes place across Austria every year on the last Sunday in September, and that next year it falls on 26 September 2027. (www.tagdesdenkmals.at, checked 2026-10-15)
• The Vienna Tourist Board's event listing says that every Sunday at 9.15 am, from mid-September to June, the Vienna Court Music Ensemble performs the Holy Mass at the Imperial Chapel. (www.wien.info, checked 2026-10-15)
• The Vienna Tourist Board says many wine taverns (Heuriger) in Vienna are open all year round but are particularly charming in spring, summer, and fall when guests can sit outside, that smaller ones are often only open during the warm season or on certain dates, and that it is best to check the specific dates on the taverns' websites. (www.wien.info, checked 2026-10-15)
• The EU's official travel site says that the Entry/Exit System's progressive implementation lasted until 9 April 2026 and that from 10 April 2026 the EES is fully operational at all external border crossing points of the European countries using the system. (travel-europe.europa.eu, checked 2026-10-15)
• The EU's official ETIAS page says that ETIAS is currently not in operation and no applications for travel authorisations are collected at this point. (travel-europe.europa.eu, checked 2026-10-15)
• The Vienna Tourist Board says that from September 7, 2026 until the end of October 2027 a central section of the inner-city S-Bahn route between Wien Praterstern and Wien Hauptbahnhof will be closed to all rail traffic due to extensive modernization works, and that the REX 7 Regional Express runs from Vienna Airport to Wien Hauptbahnhof in around 20 minutes. (www.wien.info, checked 2026-10-15)
• The Vienna Tourist Board says the underground trains (U-Bahn) run from about 5:00 a.m. to about midnight, subway lines operate 24 hours a day on Friday night, Saturday night and on the nights before holidays, and night buses operate daily from 12:30 a.m. to 5 a.m. (www.wien.info, checked 2026-10-15)
• The City of Vienna's local tax page lists the local tax as 8 percent of the payment made for staying at the accommodation (VAT and breakfast not included) from 1 July 2027. (www.wien.gv.at, checked 2026-10-15)