A warm spell is a run of at least six days for which daily maximum temperatures are sufficiently above average* for the time of year
1961-1990
average
Glasgow
Manchester
Birmingham
London
Average duration
of warm spell, days
1
5
10
20
30
2008-2017
average
A warm spell is a run of at least six days for which daily maximum temperatures are sufficiently above average* for the time of year
1961-1990
average
2008-2017
average
Average duration
of warm spell, days
1
5
10
20
30
Glasgow
Manchester
Birmingham
London