The average maximum temperature from June to August is around . Due to the marine effect, especially during hot summer days, daily temperatures are a little cooler and night temperatures higher than further inland. The highest temperature ever recorded in the city was , on 28 July 2019 at Kaisaniemi weather station, breaking the previous record of  that was observed in July 1945 at Ilmala weather station. The lowest temperature ever recorded in the city was , on 10 January 1987 although an unofficial low of  was recorded in December 1876. Helsinki Airport (in Vantaa,  north of the Helsinki city centre) recorded a temperature of , on 29 July 2010, and a low of , on 9 January 1987. Precipitation is received from frontal passages and thunderstorms. Thunderstorms are most common in the summer.