May is the peak of the New York spring — the warbler migration crests in Central Park and along the Great Lakes, the woods finish their wildflower display, and the gardens finally release from frost. It is the most concentrated, exhilarating month of the natural year, when the state's globally famous birding reaches its height.
Week by week in May
April 30 – May 6
- The warbler wave builds fast — yellow, magnolia, black-throated blue, and dozens more pour through the woods and the Lake Ontario shore.
- Lilacs, the last tulips, and the lady's slipper orchids of the pine barrens open as the spring color shifts from woods to gardens.
- Harden off warm-season seedlings, but hold off setting out tomatoes and peppers until the last frost passes — soonest downstate.
May 7–13
- Warbler migration crests — the Ramble in Central Park, Prospect Park, and Braddock Bay draw warblers and birders from around the world.
- Rose-breasted grosbeaks, scarlet tanagers, Baltimore orioles, and ruby-throated hummingbirds arrive — hang the oriole and hummingbird feeders.
- The Eta Aquariid meteor shower, debris from Halley's Comet, peaks in early May, a modest pre-dawn show from New York's latitude.
May 14–20
- Common loons settle onto Adirondack lakes and the high-peak specialty Bicknell's thrush returns to sing in the stunted summit spruce-fir.
- Around the last-frost date in much of the state, set out tomatoes, peppers, squash, and cucumbers and direct-sow beans and corn into warm soil.
- The first eastern tiger swallowtails glide along forest edges, and red admirals and painted ladies arrive as migrants, sometimes in numbers.
May 21–27
- The dawn chorus reaches its fullest as nesting takes over from migration — wood thrush, ovenbird, and red-eyed vireo sing through the woods.
- Farmers markets reopen in force, with asparagus at its peak alongside rhubarb, spring greens, and the biggest plant-sale season of the year.
- Mountain laurel begins its pink-and-white bloom across the Catskills and Hudson Highlands as the meadow flowers take over from the woods.
May 28 – June 3
- Piping plovers, least terns, and American oystercatchers tend nests on the protected Long Island beaches as the coastal breeding season peaks.
- The meadows fill with oxeye daisy, clover, buttercups, and the first black-eyed Susans as June's wildflower season opens.
- In the Adirondacks the frost-free season finally arrives — set out the last warm-season transplants once frost danger truly passes.
Birds This Month
May is the single best birding month in New York, and the headline is the warbler migration. Wave after wave of brilliant songbirds pour north — yellow, magnolia, chestnut-sided, blackburnian, black-throated blue, black-throated green, Cape May, bay-breasted, Canada, and dozens more — peaking in the second and third weeks. The legendary migrant trap is Central Park, where the wooded Ramble draws warblers and birders from around the world; Prospect Park, Jamaica Bay, and the Lake Ontario shore at Derby Hill and Braddock Bay are equally extraordinary.
The migrants arrive with rose-breasted grosbeaks, scarlet tanagers, indigo buntings, Baltimore and orchard orioles, ruby-throated hummingbirds, and a flood of flycatchers, vireos, and thrushes. In the Adirondacks, the common loon settles onto the lakes and the high-elevation specialty Bicknell's thrush returns to sing on the highest peaks; coastal beaches see returning piping plovers and least terns, and grasslands fill with bobolinks and meadowlarks. Hang oriole and hummingbird feeders by the first week, and listen at dawn for the fullest chorus of the year.
What's Blooming
May is the final, fullest chapter of New York's spring wildflowers. In the rich maple-beech forests of the Finger Lakes, Catskills, and western New York, large-flowered trillium carpets whole hillsides in white, alongside wild geranium, Virginia bluebells, Jack-in-the-pulpit, mayapple, wild columbine, Solomon's seal, false Solomon's seal, foamflower, and the last of the trout lily, bloodroot, and Dutchman's breeches. The painted and red trilliums add color in the north as the season climbs in elevation.
As the canopy closes, the show moves to open ground and wetlands: wild geranium and golden ragwort line the woodland edges, blue flag iris and wild calla open in the marshes, lupine and the first meadow flowers appear, and the pink lady's slipper orchid blooms in acid woods and the Long Island pine barrens. In gardens, lilacs, peonies, alliums, bearded iris, and the last tulips peak. The forest ephemerals fade fast once the trees leaf out, so the first half of May is the window — later in the Adirondacks, where spring is just cresting.
Garden This Month
May is the big planting month in New York, but it pivots on the last-frost date — which runs from early May downstate to late May or June in the Adirondacks. Early in the month, keep planting and harvesting cool-season crops: peas, lettuce, spinach, radishes, carrots, beets, potatoes, onions, and brassicas all thrive. Harden off your warm-season seedlings over a week of increasing outdoor exposure so they don't shock when transplanted.
Once the frost date passes, set out tomatoes, peppers, eggplant, squash, cucumbers, and basil, and direct-sow beans, corn, and melons into warm soil. Watch the forecast — a late frost can still strike, especially in upstate valleys and low spots, so keep row cover ready. In the flower garden, plant annuals after frost, divide and move perennials, stake the tall ones, and mulch beds to hold moisture. Plant native milkweed and a succession of nectar flowers now for the monarchs and pollinators that are arriving and breeding this month.
Zone 4b (Adirondacks & northern uplands): the last frost can come into late May or even early June. Keep direct-sowing hardy greens, peas, and roots, and wait until very late May or June to set out tomatoes, peppers, and squash under cover.
Zone 5b (much of upstate & the Catskills): the last frost is typically mid-to-late May. Keep cool-season crops growing and harden off warm-season transplants, setting out tomatoes, peppers, and squash only after the frost date near month's end — watch the forecast and cover for late cold.
Zone 6b (lower Hudson Valley, NYC & western lakeshore): the last frost falls in early-to-mid May. After mid-month, set out tomatoes, peppers, eggplant, and cucurbits, direct-sow beans and corn, and plant warm-season flowers, watching for any late frost in low spots.
What's at the Farmers Market
In May the great New York Greenmarkets surge back to life — the flagship Union Square Greenmarket in Manhattan, Brooklyn's Grand Army Plaza market, and the year-round Ithaca Farmers Market on Cayuga Lake all fill with the first real spring harvest. The Hudson Valley's black-dirt onion country and the muck farms of Orange County send in green garlic and the first scallions, while early asparagus, rhubarb, spinach, arugula, pea shoots, and tender head lettuces crowd the tables. Upstate stands offer the brief spring run of ramps and fiddleheads from the Adirondack and Catskill foothills, and the season's first greenhouse strawberries appear downstate at month's end. Cook fiddleheads thoroughly before eating — boil 15 minutes or steam 10–12; never raw.
This is also the state's biggest plant-sale season: New York nurseries and market stands overflow with vegetable starts, herbs, hanging baskets, and native perennials for gardeners racing to plant after the regional frost date. Look for hardy 'Jersey Knight' and 'Millennium' asparagus crowns, lupine and milkweed plugs for pollinators, and apple and grape plants from upstate growers. Choose asparagus with tight, snapping tips, use the delicate spring greens within a couple of days, and snap a pea pod to test for crisp sweetness before you buy.
Night Sky This Month
May's mild nights make for the year's most comfortable dark-sky outings in New York, and the state has true sanctuaries for them. The Adirondack Sky Center & Observatory in Tupper Lake — under some of the darkest skies in the East — runs public observing nights now, while the Custer Institute in Southold on Long Island's North Fork, the Kopernik Observatory near Vestal, and the inky skies of the Catskill Forest Preserve around Willowemoc open the season for upstate and downstate stargazers alike. At New York's roughly 41–45° latitude the spring sky climbs high: the Big Dipper stands overhead, orange Arcturus blazes in the east, and blue-white Spica and the keystone of Hercules follow.
The Eta Aquariid meteor shower, debris from Halley's Comet, peaks in early May; its low radiant keeps it modest from northern New York, so chase it in the pre-dawn hours from an open eastern horizon. The galaxy fields of Virgo, Coma Berenices, and Leo ride highest, rewarding a telescope under Tupper Lake or Catskill darkness, and the summer Milky Way begins to lift in the late-night southeast. On geomagnetically active nights the aurora can still show low over Adirondack lakes. The printable New York night-sky guide lists this year's exact meteor-peak dates, planet positions, and the best dark-sky sites near you.
Butterflies & Pollinators
May is when New York's butterfly diversity unfolds across the state's distinctive habitats. In the Albany Pine Bush, one of the world's best inland-dune ecosystems, the federally endangered Karner blue launches its spring brood as wild lupine flowers — a New York flagship insect you can watch on guided Pine Bush walks. The same sandy barrens and the Long Island pine plains produce the year's frosted, Henry's, and eastern pine elfins and the early hairstreaks, while in damp Finger Lakes and Adirondack-edge meadows the overwintered Baltimore checkerspot caterpillars finish on turtlehead.
The broader cast builds at the same time. The year's first eastern tiger swallowtails patrol Hudson Valley treelines, spicebush and black swallowtails work garden borders, and the monarch vanguard reaches New York milkweed to lay the eggs that seed the summer's home-grown broods. Migrant red admirals and painted ladies sweep through, joined by spring azures, pearl crescents, and juvenal's duskywings on the oak-barren clearings. Watch lilacs, dame's rocket, and golden ragwort on warm afternoons, and protect lupine, oak scrub, and undisturbed barrens edges — the habitats that make New York's butterfly fauna unusually rich.
What to plant for them is in the New York native plants guide
Trees This Month
May is full leaf-out across New York, the woods transforming from bare gray to full green within a few weeks (later in the Adirondacks and Catskills). The flowering trees take center stage: flowering dogwood opens its white and pink bracts in the understory, black cherry, chokecherry, hawthorn, and black locust hang fragrant white clusters, the orchard apples and crabapples burst into pink and white, and the tulip tree of the Hudson Valley opens its big orange-and-green tulip-shaped flowers high in the canopy.
The late-leafing hardwoods finally unfurl: oaks, hickories, ash, black walnut, and American beech push out their leaves and catkins as frost danger ends, and oak pollen fills the air. The conifers push new growth — eastern white pine, red pine, and pitch pine send up pale candles, and the tamaracks green again in the Adirondack bogs. By late May the canopy has closed over the forest floor, ending the brief sunlit window the spring ephemerals depended on, and the woods settle into deep summer green.
The New York native plants guide covers what grows with them
Weather & Daylight
Across New York, a typical May day averages a high near 67°F and a low near 44°F, with about 3.7 inches of precipitation — statewide averages from the 1991–2020 U.S. climate normals.
Warm, gentle days near 67 and comfortably cool nights in the 40s make for easy shirt-sleeve afternoons.
| Average high | 67°F |
|---|---|
| Average low | 44°F |
| Precipitation | 3.7 in |
| Sunrise (mid-month) | 5:40 ET |
| Sunset (mid-month) | 20:14 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.
Go deeper with the New York guides
The complete New York birding, native-plant, and night-sky references — or the whole year, week by week, in one book.
Same month elsewhere: May in North Carolina · May in North Dakota · May in Ohio