July is high summer in Maryland — hot and humid, with the Black-eyed Susans at their golden peak in the meadows, butterflies clouding the milkweed, the Chesapeake's crabs and the Eastern Shore's sweet corn and tomatoes flooding the markets, and the garden producing at full tilt.
Week by week in July
July 2–8
- Eastern Shore sweet corn and the first vine-ripe tomatoes arrive — the quintessential Maryland summer market.
- The first southbound shorebirds return to the Eastern Shore flats, the leading edge of fall migration already underway.
- Harvest daily and water deeply through the heat, and start broccoli and cabbage indoors for the fall garden.
July 9–15
- Black-eyed Susan reaches its golden peak across the meadows as ironweed and Joe-Pye weed rise in the damp ground.
- Prime hairstreak season — coral, banded, and gray hairstreaks visit milkweed as the swallowtails and monarchs cloud the blooms.
- Blueberries, blackberries, and the first peaches and melons join the corn and tomatoes at the height of summer.
July 16–22
- Harvest garlic as the lower leaves brown and cure it dry, and direct-sow carrots and beets for the fall garden.
- The heart of the summer Milky Way arches overhead — the Lagoon Nebula and globular clusters reward a dark Eastern Shore or mountain sky.
- Swamp rose mallow, the big pink marsh hibiscus, and cardinal flower glow in the tidal marshes and along the streams.
July 23–29
- Chesapeake blue crabs are at their summer peak, sold live by the dozen or bushel as the corn and tomatoes pour in.
- Monarch numbers build with the second summer brood as the meadows hum with skippers, fritillaries, and buckeyes.
- Ruby-throated hummingbirds and the first southbound warblers slip through as the breeding season winds down.
Birds This Month
July is the quiet, settled depth of the Maryland breeding season. The dawn chorus thins as birds finish nesting, but the woods are full of fledglings — young Baltimore Orioles, wood thrushes, scarlet tanagers, cardinals, and Carolina wrens following their parents and begging. American goldfinches, late nesters, are just now building as the thistledown ripens. On the Bay, the Ospreys' young are fledging and learning to fish, and the Bald Eagles have dispersed to the rivers and marshes.
Even at midsummer, change stirs by month's end. The first southbound shorebirds — adult least and semipalmated sandpipers, short-billed dowitchers, lesser yellowlegs, and willets — return to the Eastern Shore flats and impoundments, the leading edge of fall migration already underway. The salt marshes hold clapper rails, willets, and the Bay's wading-bird colonies, and the heat-loving chuck-will's-widow still calls at dusk on the Coastal Plain. Early mornings are the time to bird before the July heat and humidity build.
What's Blooming
July is the golden peak of black-eyed Susan, Maryland's state flower, which fills the summer meadows, roadsides, and old fields with masses of gold-and-brown blooms — the defining wildflower of the season. With it the open country glows with oxeye sunflower, common and butterfly milkweed, wild bergamot (bee balm), purple coneflower, common yarrow, Queen Anne's lace, chicory, and the first ironweed and Joe-Pye weed rising in the damp ground.
The wetlands and shores add their own color — swamp milkweed, pickerelweed, cardinal flower, swamp rose mallow (the big pink hibiscus of the tidal marshes), and the dune-edge seaside goldenrod greening up at Assateague. Along the streams, jewelweed and cardinal flower open. In gardens, daylilies, coneflowers, phlox, bee balm, coreopsis, and black-eyed Susans are at their summer best. The pollinator garden hums at full intensity now, the milkweed and bergamot covered in bees and butterflies on hot, bright days.
Garden This Month
July is peak harvest and peak heat in the Maryland garden. The warm-season crops produce heavily — pick tomatoes, peppers, cucumbers, summer squash, zucchini, green beans, eggplant, and the first sweet corn daily, and keep the plants picked to spur continued production. Harvest garlic as the lower leaves brown, cure it in a dry, airy place, and lift early onions and potatoes. Water deeply and consistently — an inch or two a week — early in the day, and mulch to hold moisture through the heat.
Midsummer is also when the fall garden begins. From mid-July, start broccoli, cabbage, cauliflower, and Brussels sprouts indoors or in a shaded bed, and direct-sow carrots, beets, and a second round of beans for autumn. Stay ahead of the humid-season pests and diseases — Japanese beetles, squash bugs and vine borers, hornworms, and the early tomato blights — picking pests by hand and removing diseased foliage. Deadhead the perennials and annuals, and keep containers watered daily in the July heat.
Zone 7a (central Piedmont & the Baltimore–Washington corridor): peak harvest and heat. Water deeply and consistently, mulch to hold moisture, harvest daily, and begin sowing fall crops — broccoli, cabbage, and carrots — from mid-month for an autumn harvest.
Zone 7b (lower Eastern Shore & the Bay's warming edge): the hottest, most humid gardening. Keep up steady watering, watch for fungal disease in the humidity, harvest tomatoes and corn at their peak, and start fall brassicas indoors out of the worst heat.
Zone 8a (the mildest tidewater pockets of the lower Shore): long, hot, productive days. Mulch heavily, water early in the morning, choose heat-tolerant varieties, and plan the long fall season this mild zone allows once the worst heat eases.
What's at the Farmers Market
July is when Maryland markets burst with summer. The Eastern Shore's famous crops arrive — sweet corn and vine-ripe tomatoes are the headliners — alongside cucumbers, summer squash, zucchini, green beans, peppers, eggplant, new potatoes, and bunches of fresh herbs. The fruit is glorious: blueberries, blackberries, black raspberries, the first peaches and melons, and the last cherries.
The Chesapeake's blue crabs are at their summer peak, sold live by the dozen or bushel, and the first tomatoes and corn make this the quintessential Maryland market month. Buy and eat sweet corn the same day, since its sugars turn to starch quickly — keep ears in their husks, refrigerated, until use. Never refrigerate ripe tomatoes, which ruins the flavor; keep them stem-up on the counter. Choose heavy, lively crabs that kick hard, hold them cold and damp, and cook the same day. Pick peaches that are fragrant and give slightly at the seam.
Night Sky This Month
July's warm, hazy nights bring the heart of the summer Milky Way overhead in Maryland, though the humidity can soften the view. The Summer Triangle of Vega, Deneb, and Altair rides high in the east, Scorpius with red Antares crawls low across the south, and the teapot of Sagittarius pours out the glowing star clouds of the galactic center. From a dark site, the Milky Way arches the whole sky, rich with the clusters and nebulae — M8 the Lagoon, M22, M13 — that make summer the best telescope season.
There is no major meteor shower at its peak this month, though the Delta Aquariids begin to ramp up late in July toward an early-August maximum. The wide, dark horizons of Assateague Island and the lower Eastern Shore marshes, far from the Baltimore–Washington glow, give the best Milky Way views — and warm July nights add the glimmer of fireflies over the fields below. The printable Maryland night-sky guide lists this year's planet positions and the dark-sky sites best for the summer.
Butterflies & Pollinators
July is among the very best butterfly months in Maryland, the meadows and gardens alive with color on hot, bright days. The swallowtails — eastern tiger, black, spicebush, and zebra — are joined by a full summer cast: great spangled fritillaries, monarchs, red-spotted purples, viceroys, common buckeyes, pearl crescents, question marks, eastern commas, red admirals, and painted ladies, with clouds of silver-spotted and grass skippers in the fields.
This is prime hairstreak season — coral, banded, striped, and gray hairstreaks visit milkweed and dogbane — and the monarch population builds with the second summer brood. Watch the blooming common and swamp milkweed, butterfly weed, bee balm, ironweed, and Joe-Pye weed for the season's heaviest nectaring. Check milkweed leaves for monarch caterpillars and eggs, and look in pawpaw thickets for the green-and-black banded caterpillars of the zebra swallowtail. The pollinator garden is at its absolute peak in the long, warm July days.
What to plant for them is in the Maryland native plants guide
Trees This Month
July's Maryland forests are in deep, mature summer green, and the work of the season is making fruit. The acorns swell on the white and red oaks, the winged samaras hang ripe on the maples, and the pawpaws in the river bottoms fatten their green fruit. The black cherry, blackgum, and flowering dogwood set fruit that will ripen for the fall bird migration, and the first elderberries darken along the streams.
A few trees still flower in the summer heat. The native sourwood hangs its sprays of small white bells, sweetbay magnolia opens scattered late lemony blooms in the Coastal Plain swamps, and the introduced crape myrtles begin their long summer flowering in town. On the Eastern Shore, the loblolly and Virginia pines hold their dark new growth, and the American holly sets green berries that will redden by winter. The leaves are tough and full now, casting deep shade, as the trees pour their energy into seed and into the wood that will see them through another year.
The Maryland native plants guide covers what grows with them
Weather & Daylight
Across Maryland, a typical July day averages a high near 87°F and a low near 67°F, with about 4.4 inches of precipitation — statewide averages from the 1991–2020 U.S. climate normals.
Peak summer swelter, hot and sticky with highs near 87 and nights staying warm in the upper 60s.
| Average high | 87°F |
|---|---|
| Average low | 67°F |
| Precipitation | 4.4 in |
| Sunrise (mid-month) | 5:53 ET |
| Sunset (mid-month) | 20:33 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 Maryland's next month turns — what's arriving, blooming, and worth a night outside.
Go deeper with the Maryland guides
The complete Maryland birding, native-plant, and night-sky references — or the whole year, week by week, in one book.
Same month elsewhere: July in Massachusetts · July in Michigan · July in Minnesota