What changed
2026-08-22 12:01 UTC → 2026-09-20 18:31 UTC ·
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Finland midsummer festivities and summer autumn weather volatility transition and forecast
In mid‑June, South Karelia towns prepared midsummer bonfires while Helsinki launched Following a free‑event programme that combined the Juhannus holiday with Pride week. The Finnish Meteorological Institute warned period of warm, clear high weather but issued thunderstorm and strong‑wind alerts for northern and western regions. No fire bans were imposed, though rescue services stressed safety; volatility in mid-to-late summer, the weekend saw seven accidental deaths and three homicide investigations. By weather outlook for late June September 2026 indicates a transition into autumn. Forecasts predict pleasant conditions at the parliamentary spring session ended and lawmakers turned to summer issues, including NATO and Ukraine support, while citizens celebrated birthdays, theatre outings and waterfront walks. On 11 July heavy‑rain warnings covered much start of southern Finland, the week, with up to 20 mm per hour sunshine and temperatures of 23‑30 °C. Flood alerts, flight restrictions at Helsinki‑Vantaa, a lightning‑induced house fire and widespread power outages were reported. Rescue services responded to dozens of flooding, tree‑fall and electrical‑failure calls, and rail between 10 and road traffic were disrupted across the affected counties. 15 °C. A further low‑pressure strengthening high-pressure system moved in on the weekend of 16 July, bringing very heavy rain—up to 50 mm in parts of Kainuu and North Ostrobothnia and 30‑40 mm elsewhere, while temperatures fell is expected to 10‑15 °C. Liikenneturva warned that bring dry conditions across the downpours would reduce visibility, lengthen braking distances and raise aquaplaning risk. In August, weather volatility continued with successive low-pressure systems. Around 10 August, widespread country by Tuesday. While southern regions may see early rain showers and wind warnings were issued, with gusts exceeding 15 meters per second in North Ostrobothnia, North Savo, thunderstorms, the middle and Central Finland. While Lapland remained cool, southern northern parts of Finland saw temperatures around 24 °C, accompanied by local forest fire warnings. By 20 August, a new low-pressure system developing are expected to see breaks in Central Europe approached from the south and east, threatening unstable weather over following recent rainfall. Although sunny intervals are anticipated through Wednesday, the weekend. The Finnish Meteorological Institute warned risk of heavy rainfall, particularly in Uusimaa, Kymenlaakso, and Päijät-Häme, where totals could reach 20–30 mm. rain is expected to increase nationwide starting Thursday, though temperatures are likely to remain stable.