However , the summers are short ; no more than three months of the year -LRB- but at least one month -RRB- and must have a 24-hour average temperature of at least to fall into this category of climate .

However , the summers are short ; no more than three months of the year -LRB- but at least one month -RRB- and must have a 24-hour average temperature of at least NUMBER@1 ° C -LRB- NUMBER@2 ° F -RRB- to fall into this category of climate .
