First Summerday in 2026 on 2026-05-26
May 27, 2026Yesterday’s maximum temperature of 32.5 °C marked the first summer day of the year, with 13.3 hours of sunshine. This date ranks as the 139th earliest occurrence of a summer day since 1876, placing it in the 84th percentile.
Yesterday’s maximum temperature reached 32.5 °C, marking the first summer day of the year. The day featured 13.3 hours of sunshine, which corresponds to 91.0 percent of the possible sunshine.
This date ranks as the 139th earliest occurrence of a summer day since records began in 1876, placing it in the 84th percentile. Table 1 shows the earliest summer day on record occurred on March 30, 1989, while Table 2 shows the latest occurred on June 15, 1991.
Table 1: Top 5 Years with earliest Summer Day
| Year | Date | Day of Year | Max. Temperature [°C] | Avg. Temperature [°C] |
|---|---|---|---|---|
| 1989 | 1989-03-30 | 89 | 25.2 | 16.4 |
| 2021 | 2021-03-31 | 90 | 25.0 | 15.7 |
| 1949 | 1949-04-04 | 94 | 25.0 | 15.4 |
| 1985 | 1985-04-04 | 94 | 25.2 | 15.8 |
| 1961 | 1961-04-05 | 95 | 25.1 | 14.9 |
Table 2: Bottom 5 Years with latest Summer Day
| Year | Date | Day of Year | Max. Temperature [°C] | Avg. Temperature [°C] |
|---|---|---|---|---|
| 1991 | 1991-06-15 | 166 | 26.8 | 19.9 |
| 1984 | 1984-06-13 | 165 | 25.5 | 18.3 |
| 1970 | 1970-06-07 | 158 | 26.1 | 19.8 |
| 1911 | 1911-06-06 | 157 | 25.5 | 19.4 |
| 1980 | 1980-06-05 | 157 | 25.1 | 17.7 |
Figure 1: First Summer-Day since 1876
🤖 This text was generated with the assistance of AI. All quantitative statements are derived directly from the dataset listed under Data Source.