Yesterday’s heat ranks 91st in all-time August records.

August 12, 2026

Yesterday was a hot day with a high of 34.0°C, which ranks 91st in the all-time August records, while the current season has already seen 31 summer days and 6 tropical nights.

Photo: birdeye.ch, Boat on Rhine River, Wettstein bridge, on https://chatgpt.com/c/69df12aa-40b4-8397-a5b8-de5a1ef96bb8, licensed under Unsplash License.

Yesterday was an exceptionally hot day. The temperature ranged from a minimum of 18.4 degrees Celsius to a maximum of 34.0 degrees, with a mean of 25.8 degrees.

Looking at the last 30 days, the average air temperature was 24.6 degrees. During this period, the minimum temperature recorded was 11.2 degrees and the maximum was a scorching 39.7 degrees. There were 31 summer days, 5 hot days, and 6 tropical nights in this recent stretch.

For the current season, the maximum temperature of 34.0 degrees ranks as the 26th hottest day in the last 365 days, while the mean temperature ranks 30th.

Considering all years for the month of August, the hottest day ever recorded was August 21, 1943, with a maximum temperature of 38.7 degrees. This is followed by August 13, 2003, at 38.6 degrees. The top five hottest August days, as shown in Table 1, also include August 19, 1943, at 38.4 degrees, and two recent days from this year: August 4, 2026, at 37.8 degrees, and August 3, 2026, at 37.6 degrees. The maximum temperature from yesterday ranks 91st in the all-time August records.


Table 1: Top 5 Maximum Temperatures in August since 1865
Date Max Temperature [°C]
1943-08-21 38.7
2003-08-13 38.6
1943-08-19 38.4
2026-08-04 37.8
2026-08-03 37.6

Figure 1: Min, Max and Average Temperatures in August

Data source: Opendata Basel-Stadt
Additional resources: meteostat

🤖 This text was generated with the assistance of AI. All quantitative statements are derived directly from the dataset listed under Data Source.