Västerås is a city in central Sweden, located on the shore of Lake Mälaren in the province Västmanland, some 100 kilometres (62 miles) west of Stockholm. The city had a population of 110,877 inhabitants in 2010, out of the municipal total of 150,000 (2017). Västerås is the seat of Västerås Municipality, the capital of Västmanland County and an episcopal see.
Västerås is predominantly known as an industrial city, but also a retailing and logistics city. The city wants to distinguish itself as Västerås – Mälarstaden, meaning "Västerås—the city by Lake Mälaren", in order to attract tourists and new inhabitants, as well as students to the local university college, Mälardalen University (approximately 16,000 enrolled students in Västerås and in the nearby Eskilstuna). To this effect, the city has started using a designed logo as branding in some official contexts, partially replacing the coat of arms, as well as rebuilding several old harbor areas to make them more attractive to live in. Västerås has the largest lakeside commercial and recreational port in Scandinavia on Lake Mälaren.
The city also has a skyscraper cordially nicknamed "Skrapan" which has Sweden's highest-located cocktail bar, called Sky Bar, on the 24th floor of the building. Västerås hosts Power Big Meet, an annual event where owners of high-powered American cars can meet.
According to the Köppen climate classification, Västerås experiences a humid continental climate with cold winters and warm summers.
Summers tend to be quite unpredictable with sunny spells but with a risk of sudden showers. The sunniest weather usually occurs when high-pressure systems are blocking the low-pressure systems that usually move in from the Atlantic Ocean. Daytime temperatures in July mostly hover around 22 °C (72 °F), but may sometimes exceed 25 °C (77 °F) and occasionally even 30 °C (86 °F).
Winters are usually cold with a snow cover that lasts for several months. Some winters can be mild with longer spells without snow on the ground. The weather differs a lot whether the air masses are coming from the Atlantic Ocean or from the Eurasian continent. In the first case, temperatures over 5 °C (41 °F) might be expected. In the second case, the temperature may not rise above −15 °C (5 °F) in the middle of the day. Lake Mälaren is usually frozen from December until the end of March.