Help me find this weather statistic? (snow, average, days, cities)

[kanhawk]

I am looking for a website that lists the average number of days there is measurable snow(I think that is at least 1/2 inch) on the ground in different cities around the country both by month and by season.

I tried to google this and got nada. Anyone know a site that has this?

[Summerz]

Not sure if this has what you are looking for, has lots of data(on the left) if you click on a place, I haven't searched all of the data available.

NWS Cooperative Observer Program