August is late summer in New York — the shorebird migration at its peak on the coast, the meadows gold with goldenrod and full of monarchs, the gardens and markets at their richest abundance of the year, and the warm nights bringing the famous Perseid meteors. The first hints of autumn appear in the cooling nights and the earliest turning leaves.
Week by week in August
July 30 – August 5
- Goldenrod and the first asters begin to take over the meadows and roadsides, the great nectar engines of the coming migration.
- Monarch numbers build as New York-raised generations emerge; watch milkweed for caterpillars and chrysalides.
- Sweet corn and field tomatoes hit their flavor peak as the markets swing into the abundance of high summer.
August 6–12
- The Perseid meteor shower peaks around August 12 — one of the year's best, with dozens of bright meteors an hour from a dark Adirondack or Catskill sky.
- Shorebird migration peaks at Jamaica Bay, with thousands of sandpipers, plovers, and dowitchers working the mudflats.
- Sow the last fall greens, radishes, and a final round of beets and carrots so they mature in the cooling weather.
August 13–19
- The 'super generation' of monarchs emerges and begins drifting south, gathering toward the coast for the great fall migration.
- New York ironweed, joe-pye weed, and white boneset bloom in the wet meadows alongside the peaking goldenrod.
- Peaches and plums from Hudson Valley orchards join the peak corn, tomato, and melon harvest.
August 20–26
- Common nighthawks stream south in loose flocks at dusk over the Hudson and Champlain valleys — an unmistakable late-August spectacle.
- Monarchs gather on the Long Island beaches, nectaring on seaside goldenrod before crossing toward Cape May.
- Sow a cover crop in cleared beds, divide bearded iris, and order spring-flowering bulbs for fall planting.
August 27 – September 2
- The first colored leaves appear — black gum, red maple in wet ground, and staghorn sumac flush red, the earliest hint of fall.
- Warblers in confusing fall plumage move south, and ruby-throated hummingbirds fuel up at jewelweed for their journey.
- The first apples of the new crop appear as the markets reach their peak summer abundance.
Birds This Month
August is when fall migration takes hold in New York, led by the spectacular shorebird passage along the coast. The mudflats and pools of Jamaica Bay Wildlife Refuge reach their peak, hosting thousands of semipalmated, least, and white-rumped sandpipers, semipalmated and black-bellied plovers, short-billed dowitchers, yellowlegs, dunlin, and the chance of rarer stilt, baird's, and buff-breasted sandpipers. The bays and beaches teem with terns, black skimmers, and staging egrets and herons.
The songbird exodus begins quietly but in earnest: warblers move south in confusing fall plumage, flycatchers, vireos, orioles, and tanagers slip away, and nocturnal migration fills the radar on clear nights with north winds. Common nighthawks stream south in loose flocks at dusk, especially over the Hudson and Lake Champlain valleys, an unmistakable late-August spectacle. Ruby-throated hummingbirds fuel up at jewelweed and feeders for their journey, and the first broad-winged hawks begin to gather. Keep feeders and hummingbird nectar going for the southbound travelers.
What's Blooming
August turns New York's meadows and roadsides gold and purple as the late-summer composites take over. The goldenrods — Canada, tall, gray, and seaside — blaze across old fields and shores (and, contrary to old myth, do not cause hay fever; the unseen ragweed blooming alongside them does), joined by the first wave of asters, tall purple New York ironweed, the dusty-pink domes of joe-pye weed, white boneset, and sneezeweed. These are the great nectar engines fueling the monarch migration.
The fields still hold black-eyed Susan, wild bergamot, purple coneflower, evening primrose, chicory, Queen Anne's lace, and the climbing white plumes of virgin's bower clematis along the hedgerows. In the wetlands, cardinal flower, great blue lobelia, swamp rose mallow, turtlehead, pickerelweed, and swamp milkweed bloom, and the closed bottle gentians begin in damp meadows. Gardens overflow with dahlias, zinnias, sunflowers, phlox, black-eyed Susans, and sedum — the late-summer pollinator buffet at its peak.
Garden This Month
August is the month of greatest harvest in the New York garden. The warm-season crops pour in — tomatoes at their full peak, peppers, eggplant, sweet corn, beans, summer squash, cucumbers, melons, tomatillos, and the first winter squash and potatoes. Pick daily, harvest in the cool morning, and preserve the surplus. Keep watering deeply through the late-summer dry spells, and stay on top of late blight, powdery mildew, and the season's pests in the humid heat.
This is the key month for the fall and winter garden: direct-sow or transplant spinach, lettuce, arugula, kale, Swiss chard, radishes, turnips, and a final round of beets and carrots early in the month so they mature in the cooling weather, and sow spinach late for overwintering downstate. Pull spent and diseased plants promptly, and sow a cover crop of oats or peas in any cleared beds to protect and build the soil over winter. In the flower garden, keep deadheading and cutting, divide bearded iris and oriental poppies, and order spring-flowering bulbs for fall planting.
Zone 4b (Adirondacks & northern uplands): the first frost can return by early-to-mid September here, so the season is winding toward its close. Harvest steadily, finish any fall sowings of fast greens immediately, and be ready to cover tender crops on the first cold nights.
Zone 5b (much of upstate & the Catskills): the garden is at peak harvest. Keep picking, sow fast fall greens and radishes early in the month, sow a cover crop in cleared beds, and start watching the forecast as the first frost approaches in late September or October.
Zone 6b (lower Hudson Valley, NYC & western lakeshore): warm-season abundance continues well into fall. Keep up succession sowings of greens and radishes, sow spinach for overwintering late in the month, and water consistently through the late-summer dry spells.
What's at the Farmers Market
August is the peak of abundance at New York markets — the tables groan with the full summer harvest. Sweet corn and field tomatoes are the stars, at their flavor peak and cheapest of the year, joined by peppers, eggplant, summer squash, zucchini, cucumbers, snap and shell beans, tomatillos, melons, and the first winter squash and potatoes. The berry season continues with blueberries, blackberries, raspberries, and the first peaches and plums from Hudson Valley orchards.
The first apples of the new crop appear late in the month, and the cut-flower stands overflow with dahlias, sunflowers, zinnias, gladiolus, and mixed bouquets. Choose corn with snug green husks and plump, milky kernels and use it the same day, as the sugars fade fast; pick heavy, fragrant tomatoes that yield slightly and keep them at room temperature, never the fridge; select peaches that smell sweet and give just slightly at the stem, ripening them on the counter; and choose berries that are dry, plump, and fully colored, refrigerating them unwashed.
Night Sky This Month
August is the marquee stargazing month of the New York summer, with the warm nights, the Milky Way at its richest, and the year's most beloved meteor shower. The Perseid meteor shower peaks around August 12, one of the best of the year — under dark skies it can produce dozens of bright, fast meteors an hour radiating from Perseus in the northeast, best after midnight from the Adirondacks, Catskills, or any dark country sky away from city light.
The Summer Triangle rides directly overhead, and the Milky Way blazes from Sagittarius and Scorpius in the south — where the star clouds, the Lagoon Nebula, and the galactic center lie — up through Cygnus and the Great Rift overhead. This is the prime month for binocular sweeps of the summer star clouds and for telescopic hunting of the season's clusters and nebulae. By late evening, the first autumn constellations climb the east. The printable New York night-sky guide gives this year's exact Perseid peak, planet positions, and the darkest viewing sites near you.
Butterflies & Pollinators
August is the peak butterfly month in New York and the beginning of the great event of the year — the start of the monarch migration. The final summer generation, the "super generation," emerges now, and rather than breeding, these monarchs begin drifting south. By late August they gather on the coast, and the Long Island beaches — Fire Island, Montauk, and Jones Beach — see staging flights of monarchs nectaring on seaside goldenfields before crossing toward Cape May and the long journey to Mexico. Find them on goldenrod, joe-pye weed, and ironweed everywhere.
The meadows are full: great spangled fritillaries, eastern tiger and spicebush swallowtails, viceroys, red-spotted purples, american and painted ladies, common buckeyes (more numerous late summer), pearl crescents, sulphurs, and a profusion of skippers. The little fiery and sachem skippers and migrant cloudless sulphurs can appear. Watch any stand of goldenrod, ironweed, joe-pye weed, or aster on a warm afternoon — and watch the coastal goldenrod especially for the gathering monarchs, the signature sight of late August.
What to plant for them is in the New York native plants guide
Trees This Month
August holds New York's forests in full late-summer green, but the first subtle signs of the turn appear. Stressed and early trees show a few colored leaves: the black gum (tupelo) and black cherry begin to drop scarlet leaves, the red maples in wet ground and the staghorn sumac along the roadsides flush their first deep red, and the white ash takes on a purple cast — the earliest hints of the great fall color to come.
This is the month of swelling fruit and nut crops. The acorns of the red and white oaks fatten, the hickory nuts, black walnuts, butternuts, and beechnuts develop toward fall mast, and the black cherries ripen dark, drawing birds and bears. The crabapples and hawthorns color their fruit. In the humid late-summer warmth, the webby tents of fall webworm appear in the branch tips of cherry, walnut, and other trees — unsightly but harmless to tree health. The conifers stand dark and full, and the woods are at the threshold of autumn.
The New York native plants guide covers what grows with them
Weather & Daylight
Across New York, a typical August day averages a high near 78°F and a low near 57°F, with about 4.0 inches of precipitation — statewide averages from the 1991–2020 U.S. climate normals.
Still solidly hot and sticky, highs near 78 and warm 57-degree nights, humidity lingering under a heavy summer sky.
| Average high | 78°F |
|---|---|
| Average low | 57°F |
| Precipitation | 4.0 in |
| Sunrise (mid-month) | 6:08 ET |
| Sunset (mid-month) | 20:03 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).
Next month's version of this page, by email
One short note when New York's next month turns — what's arriving, blooming, and worth a night outside.
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The complete New York birding, native-plant, and night-sky references — or the whole year, week by week, in one book.
Same month elsewhere: August in North Carolina · August in North Dakota · August in Ohio