Winter & Summer Index
Two numbers for the shape of your year: how hard the winter bites, and how lush the summer grows. Each is a score out of ten, built from degree-days and your frost-free season and ranked against every station we hold.
Set your place to score your climate.
What the scores mean
The winter score blends heating degree-days, how far and how long the year sits below comfort, with the length of the frost-free season. The summer score blends growing degree-days, the warmth crops accumulate, with that same season length. Each is turned into a percentile against every station and mapped to a one-to-ten scale, so a winter score of nine means a harder winter than ninety percent of places, and a summer score of nine a longer, warmer growing year. There is no official national index of either, so this is our own transparent composite, shown with its formula, meant for comparing places, not for planting or buying decisions on its own.
Degree-days and frost-free length from ECCC climate normals. A relative screening score we define, not a standard metric.