I think this photo has more potential than the rather accepting comments have indicated.
First of all, almost all of the snow I've ever seen (at least here in Canada, Switzerland, Austria, England, Germany, even on Kilimanjaro!) is at least 1 zone (stop) lighter than the grey shown in this photograph. I think you are doing your work a dis-service by leaving the snow at the about the same tonal value as white skin, which is about 1 zone/stop brighter than neutral grey. Typically, snow is a stop brighter than that.
Now, I understand if your intention is to convey the feeling of a grey day, you might want the snow to be dingy-grey, but I strongly believe you can still convey the feeling of the day with snow that is brighter in tone. The way it looks right now is how an averaging light meter renders snow and therefore, it looks like a metering decision rather than the photographer's decision.
Hope this makes sense.