Average March snowfall is 9.1 inches. Average April snowfall is 3.0 inches.
This does not mean we are for sure in for a foot of snow before spring. Nor does this mean we should expect around a foot of snow unless something goes wrong with the weather. What is average implies nothing about what is supposed to happen.
Average is derived by taking an average. Almost all of the time, weather is above or below average and the average is just the middle of all the samples. We usually use the average of the three most recent complete decades to calculate the average. At present, we are using 1981-2010 to compute our averages.
Each new decade the averages change. This is so what we refer to as average keeps up with the gradual changes in our climate without overreacting to sudden swings in year-to-year weather.
We might get very little snow during March and April. Or the storm track could change and we might get a lot. That's weather. That's all.
