Wisconsin's Least Snowy Winter on Record: 1930-31's Mere 4.5 Inches

Wisconsin's identity is practically synonymous with snow—average annual snowfall: 42.5 inches. But the winter of 1930-31 rewrote the record books with a startling anomaly.

The Record

Lowest seasonal snowfall ever recorded in Wisconsin: 4.5 inches (11.4 cm) — Winter 1930-31.

Contextualizing the Anomaly

Normal Range: 30-50 inches typical; 60-100+ in snowbelt counties (Iron, Gogebic, Vilas) near Lake Superior.
1930-31 vs. Average: ~90% below normal. Equivalent to one moderate storm's total.

Meteorological Causes

• Persistent La Niña pattern: Jet stream positioned far north, blocking Arctic air
• Positive North Atlantic Oscillation: Strong polar vortex trapped cold air in Canada
• Storm track shifted south: Midwest missed major systems; Ohio Valley got the snow
• Unprecedented warmth: Many WI locations recorded warmest winter on record

Impacts

Agriculture: Winterkill of alfalfa/winter wheat without insulating snow cover.
Economy: Logging/sleigh transport disrupted (frozen ground without snow = impassable mud).
Recreation: Skiing, ice fishing, snowmobiling nonexistent.
Hydrology: Reduced spring recharge; summer drought followed.

Modern Context

Climate change is increasing low-snow winters' frequency. 2011-12 (11.2"), 2016-17 (14.8"), 2020-21 (18.3") approach but haven't broken the 1930-31 record. The 4.5-inch benchmark stands as a reminder of Wisconsin's climate variability—and a preview of potential future norms.