Which States Get Snow in December?

December Snow in the United States: Overview

December marks the beginning of reliable winter snowfall across many parts of the United States, though timing and amounts vary substantially by latitude, elevation, and proximity to moisture sources. States in the northern tier and mountainous regions commonly see measurable snow during December, while southern and coastal areas usually remain snow free or experience rare accumulating flakes. This guide explains where snow is typical in December, how much to expect, and the factors that drive variability across regions and elevations.

Geographic Patterns of December Snowfall

Snow in December follows a clear north‑to‑south gradient in the United States, with reliable winter precipitation concentrated in the Upper Midwest, New England, the Rockies, and the Sierra Nevada. Closer to the equator, snow in December becomes limited to higher elevations and occasional northern dips. The sections below break down expectations by region to help you understand what to anticipate based on location.

Northern Tier and New England

States such as Alaska, Minnesota, Wisconsin, Michigan, and Maine routinely record measurable snow in December. These areas typically experience a combination of lake‑enhanced snowbands, organized winter storms, and arctic air intrusions that support multi‑day snow events. For many locations, December snowpack initiation is common, especially in areas away from major urban heat islands.

Rockies and Cascades

The Colorado Rockies, Wyoming ranges, Montana peaks, and Washington Cascades are frequently buried under December snow. High elevation stations commonly exceed several feet of snow by month’s end, while valley locations see mixed rain and snow events. The interplay of Pacific moisture and cold continental airmasses makes these mountains a focal point for December snow accumulation.

Midwest and Great Lakes

Portions of the Central and Eastern U.S. see increasing December snow risk, particularly downwind of the Great Lakes. Lake‑effect snow belts in upstate New York, northern Ohio, and northern Illinois can produce intense, localized snowfall totals that add significantly to monthly accumulation. Southern reaches of the Midwest more often see wintry mixes or brief snowfalls tied to synoptic storms.

Mountain West and Southern Extent

In the Intermountain West, December snow becomes more dependable at higher elevations but remains episodic at lower elevations. Southern and interior locations may see rare snow events during cold snaps, yet these are generally light and fleeting compared to northern regions. Below is a concise overview of typical December snow characteristics across selected states.

Typical December Snowfall Characteristics by Region (States)

The table below summarizes representative expectations for December snowfall where data are commonly available. Values are long‑term averages or typical ranges; local conditions can differ substantially from year to year.

Key Drivers of December Snowfall

Several recurring meteorological factors shape where and how much snow falls in December. Understanding these helps contextualize long‑term expectations rather than single‑event outcomes.

Temperature and Storm Tracks

December snow primarily occurs when temperatures are cold enough through the depth of the storm, typically below about 2°C (35°F) in the lowest several kilometers. The polar jet stream shifts southward, supporting winter storm tracks across the Midwest and Northeast. When these storms tap over maritime tropical or moisture feeds from the Gulf, snow can develop on the cold side of the track, especially near the Great Lakes and along coastal frontal zones.

Lake‑Effect Snow

Large, unfrozen lakes such as the Great Lakes can produce intense, narrow bands of snow once surface waters remain unfrozen into early winter. Cold air moving over relatively warm lake water enhances lift and moisture, leading to high‑impact, localized snowfall downwind. This mechanism frequently affects northern New York, northwestern Pennsylvania, northern Ohio, and northern Michigan during December.

Elevation Effects

In western states, elevation is a primary filter for snow in December. Valleys may experience rain or mixed precipitation, while nearby peaks accumulate heavy snow. Inversions and cold air pooling can also keep snow at higher elevations even when lower terrain sees rain, making mountain resorts reliable destinations for December snow sports.

Practical Takeaways for Travelers and Residents

Whether you are planning a winter trip or preparing for local conditions, focusing on elevation, historical averages, and forecast guidance improves decision making in December. The following checklist helps translate general expectations into actionable steps.

Quick Planning Checklist

• Check elevation and microclimate: Snow likelihood rises sharply with altitude; valleys may stay mostly rain free.
• Review historical normals: Use long‑term December averages for region and elevation, not single‑day extremes.
• Monitor lake‑effect and storm timing: Snow events can be intense but short‑lived; track evolving model guidance.
• Prepare for variability: Neighboring locations can experience rain, snow, or mixed precipitation on the same day.
• Carry chains or traction devices: Mountain passes and rural roads may require them even when lower elevations are clear.

Limitations and Caveats

Snowfall in December is inherently variable from year to year, influenced by broader climate patterns such as El Niño and the North Atlantic Oscillation. The ranges and regions outlined here reflect typical climatological expectations rather than guarantees for any specific December. Always consult current forecasts and local advisories when making time‑sensitive plans.

State Selection Notes and Data Sources

States included in the summary are those where December snow is sufficiently common to be considered part of the normal seasonal regime, supported by National Weather Service and cooperative network records. Elevation bands and proximity to large water bodies are key reasons certain areas are highlighted. No claims are made about rarity or absence; instead, the focus is on representative, long‑term patterns useful for planning and context.

States and Conditions at a Glance

The following high‑level comparison complements the detailed table by grouping states into broad expectation tiers for December snow, acknowledging that local topography and lake effects can shift outcomes within a state.

High Likelihood of December Snow

• Alaska (interior and coastal mountains)
• Minnesota (north and lakeside areas)
• Michigan (Upper Peninsula and northern Lower Peninsula lake‑effect zones)
• Wisconsin (north)
• Maine (north and coastal storm corridors)
• Montana, Wyoming, Colorado (mountains)
• Utah (mountains)
• Washington (Cascades)

Moderate or Localized Likelihood

New York (high in the Adirondacks and Tug Hill, lighter downstate), Idaho, Oregon (mountains), and California (Sierra Nevada) show December snow primarily at higher elevations or under favorable lake‑effect or coastal storm setups.

Low but Possible Likelihood

Portions of the Northeast and Mid-Atlantic may see light, brief snow during strong winter storms, while southern and coastal regions generally see snow only in exceptional cold events. Higher terrain in the Appalachians and southern mountains (e.g., western North Carolina) can see occasional measurable snow.