June 27, 2026, was an exceptionally hot day at the NBCN weather station in Binningen. The minimum temperature was 23.0 degrees Celsius, the maximum reached 39.0 degrees, and the average temperature settled at 31.4 degrees.

Over the last 30 days, the average temperature was 22.06 degrees, with a minimum of 9.4 degrees and a maximum of 39.0 degrees. This period included 21 summer days, 13 hot days, and 3 tropical nights. For the current season, this day ranks as the hottest for both maximum and mean temperature when compared to the last 365 days. Looking at all years for this season, the hottest day in June was June 27, 2026, with a maximum of 39.0 degrees, and the hottest day for all years remains the same date. The top five hottest June days are listed in Table 1, which shows June 27, 2026, at 39.0 degrees, followed by June 26, 2026, at 38.8 degrees, June 27, 1947, at 38.4 degrees, June 25, 2026, at 38.0 degrees, and June 26, 1947, at 36.8 degrees. The maximum temperature of 39.0 degrees on June 27 ranks as the highest ever recorded for the month of June.