Growing Season Length

The number of days where the average temperature is above 5C in the first period of the year of 6 continuous days up to when the average temperature drops below 5C for 6 continuous days, with the latter period only being counted after 1st July.

The long-term average UK growing season length, for the period 1961 – 1990 was 275.9 days, compared with 298.4 days for the period 1991 – 2020.