Utah Nature Guide: December 2026
December settles Utah into winter, with rosy-finches swarming the Wasatch resort feeders, bald eagles hunting the open rivers, and the Christmas Bird Counts tallying the Great Salt Lake's wintering waterfowl. The high country lies deep in snow under brilliant cold-night skies while the St. George desert stays mild and green.
What to look for this week
- Rosy-finches swarm the feeders at Alta and Brighton as deep snow drives black, gray-crowned, and brown-capped flocks down from the Wasatch alpine.
- The Quadrantid meteor shower peaks in a short sharp burst around January 3; chase a clear window over a dark red-rock horizon away from the valley inversions.
- Bald eagles concentrate along the open lower Bear River and at Farmington Bay, hunting the wintering waterfowl on the Great Salt Lake marshes.
- Utah's winter indoor markets lean on storage onions, potatoes, and squash, with jars of local sagebrush and alfalfa honey from the Beehive State.
Birds This Month
December is prime winter birding in Utah, and the month of the Christmas Bird Counts that tally the state's wintering birds. The signature show is the rosy-finches — flocks of black and gray-crowned rosy-finches swarming the feeders at Alta, Brighton, and Snowbasin as deep snow drives them down from the alpine, one of the most reliable rosy-finch gatherings in the Lower 48, with a rare brown-capped rosy-finch turning up among them in some years. Bald eagles concentrate along the open rivers and reservoirs and at Farmington Bay to hunt.
The still-open Great Salt Lake holds wintering common goldeneye, tundra swans, northern shovelers, green-winged teal, and diving ducks, and Antelope Island and the West Desert host rough-legged hawks, northern harriers, golden eagles, and the occasional snowy owl in irruption years. Feeders draw dark-eyed juncos, Cassin's and house finches, chickadees, spotted towhees, and down-canyon Townsend's solitaires defending juniper berries; watch for irruptive Bohemian waxwings and pine siskins.
What's Blooming
December is the heart of Utah's dormant season, and flowers are essentially absent across the snow-covered north and high country. The valleys and foothills are brown and frozen, the rabbitbrush gone to gray seed, and the high mountains buried in snow — only the dried seed heads of summer's wildflowers and the red rose hips and juniper 'berries' add any color to the winter landscape.
The one exception is the warm St. George desert, where the cool-season garden plantings stay green and a hardy winter jasmine or early hellebore may open in sheltered Dixie gardens. On the Wasatch Front, evergreen structure carries the season — the bronze-flushed leaves of foothill Mahonia, the red stems of red-osier dogwood glowing along the frozen creeks, and the dark green of conifers under snow. This is a month to enjoy the bones of the dormant landscape and to plan next year's pollinator plantings, not to look for blooms.
Garden This Month
December is a true rest for most of the Utah garden, but the work is specific to the state's climate rather than generic. On the Wasatch Front and through the cold valleys, the beds sleep under snow and hard frost. Keep garlic, strawberries, and perennials mulched against the freeze-thaw heaving that Utah's clear, cold days and nights drive, and brush heavy, wet snow off the limbs of young fruit trees, arborvitae, and shrubs before it bends or breaks them. Harvest any overwintering kale, spinach, or leeks still standing in cold frames.
Check the cellar storage crops — Utah's dry winter air keeps onions, winter squash, and potatoes well — and use any showing soft spots first. As the seed catalogs arrive, plan next year's garden for the state's wide zone range and intense high-altitude sun, and order short-season, cold-hardy varieties early. In warm St. George the cool-season garden keeps producing and bare-root planting goes on; in the high Uinta Basin and mountains the garden is fully dormant under deep snow. Clean, sharpen, and oil tools now for the spring ahead.
Zone 4b (Uinta Basin & mountain valleys): the garden rests under snow — a true winter pause. Check stored squash, onions, and potatoes, knock heavy snow off hoop houses, and plan the short-season garden over the coming seed catalogs.
Zone 5b (Wasatch Front benches): beds sleep under snow and frost; harvest from cold frames if greens overwinter, brush heavy snow off young trees and shrubs, and keep garlic and perennials mulched against freeze-thaw heaving.
Zone 8a (St. George): Utah's mildest gardens keep producing — harvest lettuce, spinach, greens, and roots, sow more cool-season crops, and plant bare-root fruit and roses in the open ground.
What's at the Farmers Market
December markets in Utah are winter and holiday affairs, built on storage crops and pantry goods since the fields are frozen. The indoor winter farmers markets on the Wasatch Front — in Salt Lake City, Ogden, and Provo — stock the keeping vegetables: storage onions, potatoes, carrots, beets, winter squash, and cold-stored cabbage, plus storage apples still crisp from the bench orchards.
Local honey from the season's bloom is a holiday staple and a popular gift, and cold-hardy kale, spinach, and leeks from high tunnels still appear. The holiday markets fill with farm eggs, grass-fed and pasture-raised meats, artisan cheese, milled grains, dried beans, home-canned preserves, baked goods, and craft and gift vendors. Greenhouse microgreens and salad greens add fresh color. Utah's winter pantry — its storage crops, honey, and preserves — carries the markets through the cold, dark turn of the year until spring slowly returns.
Night Sky This Month
December's longest nights and dry, cold air give Utah some of the year's most brilliant skies, bitterly cold but stunning. The red-rock parks — Bryce Canyon, Capitol Reef, Canyonlands, Arches, and Natural Bridges — hold crystalline winter darkness, and Antelope Island State Park and Dead Horse Point give accessible cold-night skies, though Wasatch Front inversions can blanket the valleys in haze while the mountains stay clear above. Bundle up and chase the clear, cold windows.
The brilliant winter sky returns in full: Orion rides high in the south by late evening, with Taurus, the Pleiades, Gemini, the dog stars Sirius and Procyon, and the bright winter hexagon filling the sky. The Geminid meteor shower, one of the year's best, peaks around December 14, throwing dozens of bright meteors an hour from a dark site, and the Ursids follow near the solstice. The printable Utah night-sky guide lists this year's planet positions and the best dark-sky viewing dates.
Butterflies & Pollinators
December is the quietest butterfly month in Utah, but the state's hardy overwintering adults are present even if rarely seen. The mourning cloak, which hibernates as an adult under cottonwood bark, in woodpiles, and in canyon outbuildings, can flap briefly along a Wasatch foothill or lower-canyon edge on the rare sunny afternoon above about 50°F. In the mild St. George desert, an overwintering painted lady or tortoiseshell may fly on the warmest Dixie days.
Everywhere else — the snow-bound high country and the frozen Great Basin valleys — Utah's butterflies wait out the cold as hibernating adults, eggs, and chrysalids tucked into bark, leaf litter, and brush. The California and other tortoiseshells and the angled commas shelter alongside the mourning cloaks. This is the season to leave woodpiles, leaf litter, and standing stems undisturbed, since they shelter the very butterflies that will be the first on the wing in late winter, and to plan a native pollinator garden — milkweed, rabbitbrush, and willow — for the year ahead.
Trees This Month
December holds Utah's trees in deep winter. The state tree, quaking aspen, stands bare and pale white-green in its clonal stands across the snowbound Wasatch and Uintas, and the leafless gray limbs of Fremont cottonwood trace the frozen rivers and irrigation ditches. The foothill Gambel oak thickets hold their bronze marcescent leaves, rattling in the cold wind over the snow.
The evergreens carry the entire winter landscape: Utah juniper and Colorado pinyon blanket the red-rock plateau country, blue juniper 'berries' feeding solitaires and waxwings, while the high forests of Engelmann spruce, subalpine fir, and Douglas-fir stand dark green under deep snow. On the highest wind-blasted ridges, the ancient twisted bristlecone and limber pines endure the winter storms as they have for thousands of years. In the far southwest, the desert Joshua trees and singleleaf pinyon stand evergreen in the mild Dixie cold, the warmest corner of the state.
Go deeper with the Utah guides
The complete Utah birding, native-plant, wildflower, and night-sky guides — or the whole year in one bundle.
Same month elsewhere: December in Vermont · December in Virginia · December in Washington