North Carolina Nature Guide: September 2026
Data updated: August 2026Sources & method · Corrections
September is the great fall-migration month in North Carolina — hawks stream down the Blue Ridge, monarchs stack up on the Outer Banks before the Gulf crossing, the goldenrod-and-aster wave blazes, and the first apples and muscadines crowd the markets as the long Southern summer finally breaks.
Week by week in September
September 3–9
- Southbound warblers, vireos, and thrushes pour through the woods as the first wintering sparrows and waterfowl trickle in.
- The goldenrod-and-aster show reaches its height — a critical late-season nectar source for migrating monarchs and bees.
- Plant garlic, sow cover crops in emptied beds, and dig sweet potatoes as the vines fade, curing them warm for storage.
September 10–16
- The great Broad-winged Hawk flight streams south in swirling kettles over Blue Ridge ridgetops like Mahogany Rock and Grandfather Mountain.
- Monarchs funnel down the mountains and stack up on the Outer Banks, feeding on goldenrod before the long Gulf crossing.
- Apples, muscadines, the first pumpkins, and freshly dug sweet potatoes crowd the stands as summer and fall overlap.
September 17–23
- The fall equinox near the 22nd returns earlier darkness as the Andromeda Galaxy climbs high — the most distant object visible to the naked eye.
- Shorebird migration runs full at Pea Island and Common Nighthawks and Chimney Swifts stream and swarm south at dusk.
- Black gum and sourwood flame deep scarlet in the lowlands, and the first sugar maples color the highest mountain slopes.
September 24–30
- Wintering sparrows pour in — White-throated, White-crowned, and Song Sparrows — and Yellow-rumped Warblers flood the woods.
- The monarch migration peaks, with the great river of butterflies funneling down the ridges and concentrating on the coast.
- The fall garden hits its stride as the heat breaks — set out the last brassicas and sow spinach, lettuce, and quick greens.
Birds This Month
September is the peak of fall migration across North Carolina. The mountains host the great Broad-winged Hawk flight, when thousands stream south in swirling kettles over Blue Ridge ridgetops like Mahogany Rock, Mount Pisgah, and Grandfather Mountain in mid-month, mixed with Bald Eagles, Ospreys, Sharp-shinned and Cooper's Hawks, American Kestrels, and Peregrine Falcons. The woods fill with southbound warblers — Cape May, Magnolia, Blackburnian, Black-throated Green, Tennessee, Bay-breasted, and many more — along with vireos, thrushes, tanagers, grosbeaks, and the last Ruby-throated Hummingbirds.
On the coast, the shorebird migration runs full at Pea Island — sandpipers, plovers, dowitchers, godwits, and American Avocets crowd the flats — and hurricanes can blow seabirds to shore and inland. Common Nighthawks stream south in evening flocks, Chimney Swifts swarm into roost chimneys at dusk, and Bobolinks pass over the fields. The first wintering sparrows and the earliest returning waterfowl arrive late in the month, the leading edge of the great waterfowl tide building toward Mattamuskeet.
What's Blooming
September is the height of North Carolina's autumn wildflower show. The roadsides, old fields, and meadows blaze with the great goldenrod-and-aster wave — a dozen species of goldenrod in golden plumes set against the purples and whites of New England, New York, aromatic, and white wood asters. With them bloom ironweed, Joe-pye weed, mistflower, tall sunflowers, partridge pea, blazing star, and the deepening black-eyed Susans — a critical late-season nectar source for migrating monarchs and bees.
In the high Blue Ridge, the cool meadows and balds hold late asters, goldenrods, monkshood, white snakeroot, gentians, and grass-of-Parnassus. The longleaf savannas of the Coastal Plain glow with blazing star, pine-barren gentian, yellow-eyed grass, false foxglove, and the late-summer orchids. Stream banks still flame with cardinal flower and the blue great lobelia. In gardens, the zinnias, salvias, sunflowers, mums, and native asters and goldenrods carry the pollinators into fall as the season's long bloom begins to wind toward its close.
Garden This Month
September is the second great planting season in North Carolina — the fall garden hits its stride as the heat finally breaks. Set out transplants of broccoli, cabbage, cauliflower, Brussels sprouts, kale, and collards, and direct-sow spinach, lettuce, mustard, turnips, beets, carrots, radishes, and Swiss chard for the long, mild Southern autumn harvest. The cool-season crops will grow well into winter in the Piedmont and Coastal Plain, the reward of the state's long growing year.
Keep harvesting the last of summer — tomatoes, peppers, okra, eggplant, field peas, melons, and beans — and dig sweet potatoes as the vines fade, curing them warm for storage. In the mountains, race the first frost: harvest and protect tender crops before the cold arrives at elevation. Plant garlic and overwintering onions toward month's end across the state, sow cover crops in emptied beds to protect the soil, and divide and plant perennials and spring bulbs as the soil cools and the fall rains return. The fall garden is one of the best-kept secrets of Carolina gardening.
Zone 6b (high mountains & Asheville plateau): the first frost nears. Harvest the last tomatoes and warm-season crops before the frost date, keep the fall greens and root crops going under cover, and plant garlic and cover crops as the season closes early at elevation.
Zone 7b (central Piedmont): prime fall gardening. Set out the last brassica and lettuce transplants, direct-sow spinach, radishes, and quick greens, plant garlic late in the month, and enjoy the cool-season harvest as the heat finally breaks.
Zone 8a (eastern Coastal Plain): the long fall season opens. Direct-sow greens, lettuce, carrots, beets, turnips, and radishes, set out brassicas, and keep harvesting peppers, okra, and sweet potatoes as the worst heat eases into mild autumn.
What's at the Farmers Market
September markets in North Carolina turn from summer toward fall. The first apples from Henderson County orchards arrive — the South's top apple region around Hendersonville — joined by muscadine and scuppernong grapes at their peak, the native Southern grape, and the first pumpkins, winter squash, and freshly dug sweet potatoes, the state's signature crop. The last summer fruit lingers — figs, melons, and late peaches early in the month.
The vegetable tables hold both seasons: tomatoes, peppers, okra, eggplant, field peas, butterbeans, and sweet corn alongside the first fall greens, broccoli, cabbage, and root crops. Choose apples firm and heavy, store them cold and away from other produce; pick muscadines plump, dry, and unbruised and eat within a few days; and store sweet potatoes cool, dark, and dry but never refrigerated. Choose winter squash and pumpkins with hard, unblemished rinds and intact stems for long keeping. The markets are rich with the bounty of the season's turn, summer's last and autumn's first crowding the same tables.
The North Carolina native plants guide covers what grows here
Night Sky This Month
September brings the fall equinox near the 22nd, and the lengthening nights return darkness earlier. The summer Milky Way still arches high overhead through the Summer Triangle in the early evening, while the great Andromeda Galaxy (M31) — the most distant object visible to the naked eye — climbs in the northeast in Andromeda, below the W of Cassiopeia and the Great Square of Pegasus. It is a fine binocular and dark-sky target as the autumn sky takes over.
There is no major meteor shower this month, so September favors the rich summer Milky Way before it sinks and the rising autumn constellations. Watch too for the zodiacal light — a faint cone of light in the east before dawn — and, on the most active nights, the chance of aurora low on the northern horizon from the high mountains. From a dark site such as the Blue Ridge Parkway overlooks or the Outer Banks, the transition into the autumn sky is at its finest. The printable North Carolina night-sky guide lists this year's exact planet positions and dark-sky sites for the season.
Butterflies & Pollinators
September is the climax of the North Carolina butterfly year — the great monarch migration. The migratory generation streams south through the state, the mountains funneling them down the ridges and the Outer Banks concentrating them spectacularly at Cape Hatteras and the barrier-island points, where they stack up to feed on goldenrod and seaside flowers before the long Gulf crossing. Watch for them nectaring heavily on goldenrod, aster, ironweed, and blazing star on warm, calm days.
The migration is not monarchs alone: cloudless sulphurs, common buckeyes, gulf fritillaries, long-tailed skippers, and painted and American ladies all move south in numbers, and the coast can host large fall flights. The resident butterflies stay abundant too — eastern tiger swallowtails (the state butterfly), spicebush and black swallowtails, pearl crescents, fiery skippers, and red admirals work the fall flowers. The blooming goldenrod and aster are the single most important late-season nectar source — plant and protect them, and watch the great river of migrating butterflies pour through on its way south.
What to plant for them is in the North Carolina native plants guide
Trees This Month
September begins the long descent of North Carolina's spectacular fall color, the turn starting on the high peaks and creeping downward. The black gum (tupelo) and sourwood lead in the Piedmont and Coastal Plain, flaming deep scarlet, joined by the first reddening red maples, dogwoods (the state flower, whose leaves turn maroon and whose red fruit ripens), and Virginia creeper and poison ivy vines blazing in the wood edges.
On the high Blue Ridge, the color builds fast — yellow birch, mountain ash, sugar maple, American beech, and striped maple turn the upper slopes gold and red by month's end, the leading edge of the famous mountain color that will peak in October. The trees finish ripening their great seed crop: the oaks drop their acorns, the hickories and black walnuts their nuts, the persimmons soften to sweet orange, and the dogwood, black gum, and spicebush hang red and dark berries that fuel the migrating birds. The forest is feeding the great autumn movement of wildlife southward.
The North Carolina native plants guide covers what grows with them
Weather & Daylight
Across North Carolina, a typical September day averages a high near 81°F and a low near 61°F, with about 5.3 inches of precipitation — statewide averages from the 1991–2020 U.S. climate normals.
Still summery by day near 81, but nights easing into the low 60s hint at fall while rain stays heavy.
| Average high | 81°F |
|---|---|
| Average low | 61°F |
| Precipitation | 5.3 in |
| Sunrise (mid-month) | 7:00 ET |
| Sunset (mid-month) | 19:26 ET |
Figures are statewide averages over the 1991–2020 U.S. climate normals; local conditions vary with elevation and distance from the coast. Sunrise and sunset are computed for a midstate point on the 15th (ET).
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The complete North Carolina birding, native-plant, and night-sky references — or the whole year, week by week, in one book.
Same month elsewhere: September in North Dakota · September in Ohio · September in Oklahoma