Västerås, on the shore of Lake Mälaren west of Stockholm, receives around 540 mm (about 21 inches) of rain a year, among the drier parts of Sweden, reflecting its inland, lake-side position sheltered from the more direct Atlantic influence seen on the west coast. Rain is fairly evenly distributed through the seasons, with a modest summer peak from convective showers. The lake itself moderates local temperatures somewhat, and sudden storms can produce brief but locally intense downpours capable of overwhelming smaller drainage systems in the city center. Because summer storm cells here can be quite localized around the lake, radar helps residents judge whether a cell is actually heading their way. SMHI operates the national weather radar network.
Learn more: How Does Rain Radar Work? · Open the full Rain Map