California Nature Guide: January 2026
January is California's deep-winter peak — but here that means green hills, full wetlands, and the height of the citrus season. The Central Valley brims with wintering waterfowl and sandhill cranes, the coast is alive with whales and seabirds, and winter rains have set the foothills emerald.
What to look for this week
- Snow geese, white-fronted geese, and pintail jam the Sacramento and San Joaquin valley refuges; sandhill cranes roost near Lodi and Cosumnes.
- San Joaquin Valley navel and Cara Cara oranges and easy-peel Satsuma mandarins are at their winter peak.
- Western monarchs hang in clustered curtains in the coastal groves at Pismo Beach, Pacific Grove, and Natural Bridges.
- The Quadrantid meteor shower peaks around January 3 in a brief, sharp burst, best after midnight from a dark desert site.
Birds This Month
January is one of California's two greatest birding months, and the show is the wintering waterfowl of the Central Valley. The Sacramento and San Joaquin National Wildlife Refuge complexes hold staggering numbers of snow geese, Ross's geese, greater white-fronted geese, northern pintail, and dozens of other ducks — clouds of birds rising off the flooded rice fields at dawn are one of the Pacific Flyway's signature spectacles. Nearby, the sandhill crane roosts around the Cosumnes River Preserve and Woodbridge Road near Lodi are at their winter peak, the cranes flying out to glean stubble fields by day and returning to the water at dusk with their bugling calls.
On the coast, January birding is excellent. Gray whales stream south past Point Reyes and the Monterey coast, sharing the water with rafts of surf scoters, loons, grebes, and wintering brant. Rocky shorelines hold black turnstones, surfbirds, and the dapper black oystercatcher. Inland, the foothills and oak woodlands stay busy with resident California scrub-jays, oak titmice, Nuttall's woodpeckers, and acorn woodpeckers at their granary trees.
Don't overlook the raptors — January is prime time for wintering bald eagles over the valley reservoirs and Klamath Basin, and ferruginous hawks and the rare rough-legged hawk hunt the open grasslands. The state bird, the California quail, gathers in coveys in brushy chaparral and garden edges.
This month's tip: visit a valley refuge at first light on a cold, clear morning. The dawn fly-out of geese and the crane fly-in at dusk are the two unmissable moments of the California birding year.
What's Blooming
January in California is a green month, not a bare one — winter rains have woken the hills, and the first flowers of the long Mediterranean spring are already appearing. Along the coast and in Southern California, manzanita shrubs hang with urn-shaped pink-and-white bells, an important early nectar source, and the first California poppies begin opening on warm south-facing slopes in the southern part of the state. In the chaparral, bush monkeyflower and early ceanothus (California lilac) start to show.
The deserts are stirring too. In a year with good autumn and winter rain, the seedlings carpeting the floor of Anza-Borrego Desert State Park are growing fast now, setting up a potential spring superbloom; the earliest desert annuals, including desert sand verbena and desert sunflower, can begin opening on the warmest low-desert flats by late January. Coastal bluffs show early seaside daisy and the lavender of wild radish along roadsides.
Where to look: the Southern California chaparral and the low desert are the earliest. Walk a coastal trail at Torrey Pines or a chaparral slope in the Santa Monica Mountains and watch for manzanita and the first poppies. Tread lightly off-trail in the desert — the tiny green seedlings underfoot are next month's flowers.
Garden This Month
The California garden barely pauses in January. In the mild coastal and valley zones, this is the heart of the cool-season vegetable garden — lettuce, spinach, chard, kale, broccoli, cabbage, peas, fava beans, cilantro, and root crops all thrive in the cool, often rainy weather, and onions and garlic planted earlier are filling in. It is also the prime bare-root planting window: nurseries stock dormant roses, grapevines, cane berries, and deciduous fruit trees now, and getting them in the ground while dormant gives roots a head start before spring.
January is the key month for dormant-season fruit-tree care across the warmer zones — prune apples, pears, and stone fruit, and spray peaches and nectarines with dormant oil and copper to prevent peach leaf curl, the single most important California stone-fruit task. Take advantage of the winter rains to plant California natives and to skip irrigation; this is the best planting season of the year for natives, which establish on the rains and need little summer water. Mulch beds, pull cool-season weeds while they are small, and protect tender plants from the occasional valley frost or radiation freeze.
Zone 10a (mild coast, Los Angeles basin, coastal Southern California): the frost-free coast lets you grow straight through winter — keep sowing lettuce, spinach, chard, peas, fava beans, and brassicas, and plant bare-root roses and deciduous fruit. Citrus is ripening; this is a fine month to plant new citrus on the mild coast.
Zone 6b (Sierra Nevada foothills and higher elevations): the mountain garden is dormant under cold and often snow — there is little to plant outdoors. Prune dormant fruit trees on a dry day, keep mulch over perennials, and plan and order seed for the short Sierra season ahead.
Zone 9b (Central Valley, inland Southern California): January is bare-root planting season — set out roses, grapes, cane berries, and deciduous fruit trees while they are dormant, and apply dormant oil and copper sprays to peaches and nectarines to head off peach leaf curl. Plant onions and keep harvesting cool-season greens.
What's at the Farmers Market
January is citrus month in California, and the markets reflect it. The San Joaquin Valley's navel oranges and the sweeter, pink-fleshed Cara Cara navels are at their peak, joined by mandarins — the seedless, easy-peel Owari Satsumas and the later W. Murcott and Tango — plus Meyer lemons, blood oranges, and ruby grapefruit. Choose fruit heavy for its size with firm, glossy skin; the heaviest oranges are the juiciest, and citrus keeps for weeks loose in the refrigerator.
The cool season also fills the stalls with vegetables. Look for sweet, frost-kissed broccoli, cauliflower, cabbage, kale, chard, and Brussels sprouts (California grows most of the nation's crop along the foggy Central Coast), along with carrots, beets, fennel, leeks, and a wide range of lettuces. The first Hass avocados are beginning to show from Southern California groves.
For selection and storage: choose greens with crisp, unwilted leaves and keep them dry in the crisper; store carrots and beets with the tops trimmed off; keep citrus loose and cool rather than bagged. Winter is one of the best times to shop a California farmers market — the citrus and brassicas are at their sweetest, and the choice is wide.
Night Sky This Month
California's clear, dry winter nights and its many dark-sky places make January superb for stargazing if you can find a calm, cloud-free night between storms. The state's premier dark-sky destinations include Death Valley National Park (an International Dark Sky Park with some of the darkest skies in the country), Joshua Tree National Park, Anza-Borrego Desert State Park, and the high Sierra; the Lick Observatory on Mount Hamilton above San Jose and the historic Mount Wilson Observatory above Los Angeles are landmark public observatories. Winter is also when the high desert offers crisp transparency before the haze of warmer months.
The winter sky overhead is the grandest of the year. Orion dominates the south, its belt pointing down to brilliant blue-white Sirius in Canis Major, the brightest star in the night sky. Around Orion wheels the great Winter Hexagon, linking Aldebaran, Capella, Pollux, Procyon, Sirius, and Rigel, with the little dipper-shaped Pleiades star cluster riding high. The Quadrantid meteor shower peaks around January 3 in a brief, sharp burst best seen after midnight from a dark desert site.
For this year's exact planet positions and the best dark nights around the moon, see the printable California night-sky guide, which gives the timing tailored to the state's latitudes.
Butterflies & Pollinators
California is one of the few states where butterflies fly even in January, thanks to its mild winters. The headline is the western monarch overwintering phenomenon: clusters of monarchs hang in the eucalyptus, Monterey pine, and Monterey cypress groves at Pismo Beach, Pacific Grove (the self-styled "Butterfly Town, USA"), and Santa Cruz's Natural Bridges State Beach. On cool mornings they hang motionless in orange curtains; when the winter sun warms the grove, they spill out to drink and bask — a magical, accessible winter spectacle on the Central Coast.
Away from the groves, a handful of hardy species take advantage of warm winter afternoons. The mourning cloak, which overwinters as an adult, flies along foothill streams and canyon bottoms on sunny days, and the gulf fritillary persists in mild coastal and Southern California gardens wherever passionflower vine grows. Cabbage whites drift over winter vegetable gardens, and the occasional fiery skipper or painted lady appears in the warmest spots.
To help them: the best January act is to visit a monarch grove respectfully and keep its trees standing in your community, and to leave winter nectar — the early manzanita, ceanothus, and any blooming garden plants — for the few butterflies on the wing. Plant native milkweed (not the tropical kind) to support the monarchs that will disperse inland to breed as winter ends.
Trees This Month
California's trees tell two different January stories. The evergreens that define the state — the coast redwoods, giant sequoias, ponderosa and Jeffrey pines, and the coast live oaks and blue oaks of the foothills — hold their canopies through winter, the redwoods drinking the coastal fog and rain that sustain them. In the Sierra, the sequoias and pines stand deep in snow, the snowpack that will feed the state's rivers all summer accumulating around their trunks.
The deciduous trees, by contrast, are bare and dormant. The great valley oaks stand leafless and sculptural over the Central Valley grasslands, the bigleaf maples and black cottonwoods of stream canyons are stripped down, and the orchard trees of the valley — almonds, peaches, walnuts — wait dormant for their late-winter bloom. Watch the almond orchards especially: by the end of January, in a warm year, the first pinkish-white buds begin to swell, the earliest hint of the spectacular bloom that arrives in February and signals the turning of the California year.
Go deeper with the California guides
The complete California birding, native-plant, wildflower, and night-sky guides — or the whole year in one bundle.
Same month elsewhere: January in Colorado · January in Connecticut · January in Delaware