My guess to your query - near continuous cold and most storms not having mid-level warm tongues to wreck aggregates and/or changing P-type. We had some rain, not a lot, but almost no mixed precip or rimed flakes. February 2026 was our driest with 0.76", but it was 100% snow, 12.5" for a 16.4-to-1 ratio. Without looking thru the data, I can't recall any month that had nothing but flakes.
Oddly, 2020-21 was our lowest ratio at 7.08. It was our 2nd least snow, ahead of only 15-16, and almost every snowfall either had mix or was cornmeal. The season's biggest storm, 9.5" on 2/2, was the latter, 1.32" of teeny flakes, ratio 7.2-to-1.