Variable | Mean | Standard deviation |
500 hPa criterion (days) | 51-June 20 | 13.4 |
Mean temperature criterion (days) | 42-June 11 | 9.2 |
Maximum temperature criterion (days) | 38-June 7 | 14.1 |
Final date (days) | 43-June 12 | 9.7 |
Summer temperature (˚C) | 24.3 | 1.1 |
Spring temperature (˚C) | 12.4 | 1.3 |
Difference (˚C) | 11.9 | 0.4 |