I grew up in Southern California south of L.A.. The only way I saw snow was to go up to the mountains in winter. My mother lived her entire life in So. Cal. in or near Los Angeles. She saw hail TWICE, no snow ever except away from home.
I moved to Vermont over 30 years ago and learned a thing or two about snow.
1) It doesn't snow all the time. Actually, the roads are clear at least 90% of the winter. Still need good snow tires for the other 10%
2) A couple of inches twice a week is nice, keeps everything clean looking. No snow makes for a LONG, dreary, ugly winter. Big dumps are hard on the back.
3) At about 10F (-12C), snow starts to squeak when you walk on it.
4) It
CAN be too cold to snow! The REAL cold usually comes without the cloud blanket that keeps heat (relative of course) in: No clouds, no snow.
My guess is that since you live so near the sea, there is always some moisture in the air to keep your snow shovel full

They get wicked amounts of snow in a belt east of Lake Erie, Jet stream blows the Alberta Clipper over the lake, picks up water and dumps "lake effect" snow.
30 cm? Not even a foot! Wimp
Just kidding of course. 11" is a lot of snow to move especially if it isn't the light and fluffy stuff that comes with cold temps. WELL below freezing cold, not just below freezing cold. Just below freezing is wet, heavy, nasty stuff. The kind the plows use to make ice walls at the end of your driveway. The only way to keep up if you don't have a blower or plow is to get out there often even though there is another 1/2" (1.25 cm) at the other end by the time you get to the bottom.