May is the richest month of Nevada's nature calendar — peak songbird migration through the riparian oases, the Great Basin sagebrush in full bloom, and the legendary Himalayan Snowcock of the Ruby Mountains active on the high crags. The low Mojave heats toward summer as the high ranges finally green.
Week by week in May
April 30 – May 6
- Migration crests — riparian galleries drip with western tanagers, Bullock's orioles, and yellow and Wilson's warblers.
- The Eta Aquariid meteor shower, debris from Halley's Comet, peaks in early May under warm, comfortable Nevada nights.
- Boisduval's and Melissa blues, juniper hairstreaks, and pale swallowtails work the sagebrush and valley flowers.
May 7–13
- The introduced Himalayan Snowcock calls from the high rocky cirques above Lamoille Canyon in the Ruby Mountains, found nowhere else in North America.
- The Great Basin sagebrush is at its flowering height — balsamroot, lupine, paintbrush, mule's ears, penstemon, and desert peach.
- After mid-May the last frost passes in Reno and Carson — set out tomatoes, peppers, squash, beans, and melons.
May 14–20
- Breeding shorebirds settle at Ruby Lake and the Lahontan Valley — avocets, stilts, white-faced ibis, grebes, and terns.
- Monarchs are breeding on showy and narrowleaf milkweed in the irrigated valleys, their caterpillars feeding now.
- Strawberries, asparagus, peas, spring onions, and crisp lettuces fill the markets before the heat.
May 21–27
- The mid-elevation canyons of the Rubies and Great Basin National Park begin their long wildflower season.
- Mountain bluebirds, the state bird, nest in the pinyon-juniper as the high country fills with returning montane breeders.
- The single-leaf piñon flushes new growth and dusts the foothill woodland with reddish pollen.
May 28 – June 3
- The high ranges fill with nesting Clark's nutcrackers, Cassin's finches, and broad-tailed hummingbirds as the snow clears.
- Mojave cactus flowers — cholla, hedgehog, and barrel — color Red Rock Canyon as the desert south heats toward summer.
- Las Vegas gardens enter survival mode — set up shade cloth and water deeply at dawn as triple-digit days arrive.
Birds This Month
May is Nevada's premier birding month, with migration cresting and breeders settling in. The riparian cottonwood galleries along the Truckee, Carson, and Walker rivers and the desert oases drip with migrants — western tanagers, Bullock's orioles, black-headed grosbeaks, warbling vireos, yellow, MacGillivray's, and Wilson's warblers, and a parade of flycatchers. The Lahontan Valley wetlands and Ruby Lake NWR hold breeding American avocets, black-necked stilts, white-faced ibis, grebes, and terns.
The Ruby Mountains hold Nevada's great avian oddity: the introduced Himalayan Snowcock, a Eurasian gamebird established only here in North America, calls from the high rocky cirques above Lamoille Canyon and is best found at dawn. The sagebrush sea sings with sage thrashers, sagebrush and Brewer's sparrows, and green-tailed towhees; mountain bluebirds (state bird) nest in the pinyon-juniper. In the Mojave, Scott's orioles, phainopepla, and Lucy's warblers are in full breeding swing.
What's Blooming
May fills the Great Basin with bloom. The sagebrush slopes, valley grasslands, and aspen edges of the ranges and the Carson and Truckee foothills color with arrowleaf balsamroot, blue and silvery lupines, scarlet Indian paintbrush, mule's ears, desert peach, penstemon, death camas, and the white-and-yellow of desert parsley and phlox. The mid-elevation canyons of the Rubies and Great Basin National Park begin their long wildflower season.
In the heating Mojave south, the desert bloom is mostly finished, though late-blooming desert marigold, chuparosa, indigo bush, and the spectacular flowers of cholla, hedgehog cactus, and Mojave yucca persist around Red Rock Canyon and Lake Mead. The high ranges are still emerging from snow, their alpine peak a month off. May is a transitional, colorful month — the Great Basin at its flowering height as the desert south winds down and the mountains wake.
Garden This Month
May is the great planting month for northern Nevada and the heat-beating month for the south. In the cold north — Reno, Carson Valley, and the higher valleys — the last spring frost finally passes around mid-to-late May, opening the window to set out tomatoes, peppers, squash, beans, cucumbers, and melons and direct-sow corn. Keep frost cloth ready, since a late cold snap is always possible, and the high valleys around Elko and Ely should wait into early June.
In the Mojave south, the garden is racing a closing window: keep the warm-season crops deeply watered and mulched, set up shade cloth as triple-digit heat arrives, and harvest the last cool-season greens before they bolt. Statewide, water deeply but infrequently to encourage deep roots in the dry climate, mulch heavily to hold moisture in the alkaline soil, and watch the wide day-night swings. Drip irrigation pays for itself fast in Nevada's arid heat.
Zone 6a (Elko, Ely & higher north): still risky — wait until late May or early June for tender transplants, and protect them; sow hardy greens, peas, and root crops, and use season-extending covers in the short cold-valley summer.
Zone 7a (Reno & western valleys; cold-pooled Carson Valley floors run colder): after mid-May, the last frost passes — set out tomatoes, peppers, squash, beans, and melons, and direct-sow corn and cucumbers; keep frost cloth handy for a late cold night.
Zone 9a (Las Vegas valley): beat the heat. Keep tomatoes, peppers, melons, squash, and okra deeply watered and mulched, harvest the last cool crops, and set up shade cloth as triple-digit days arrive — the productive window is closing fast.
What's at the Farmers Market
May markets across Nevada hit their spring stride. The southern farms and the year-round Las Vegas-area markets offer strawberries, asparagus, peas, spring onions, radishes, baby carrots, beets, and crisp lettuces before the heat. The northern markets fully open now, with overwintered and early-spring greens, spinach, chard, green garlic, rhubarb, and the first radishes and salad turnips.
Local desert honey, farm eggs, bedding plants, and herb starts fill the stalls. Choose asparagus with tight tips and snappy stalks and refrigerate it standing in water; pick strawberries fully red and fragrant; select greens crisp and bright and keep them damp and cold. Nevada's headline crops — Fallon 'Hearts of Gold' cantaloupe, sweet corn, and field tomatoes — are still weeks out as the plants set fruit in the warming valleys, so May is a month of tender spring vegetables and the first soft fruits.
Night Sky This Month
May offers warm, comfortable nights under Nevada's exceptional dark skies. The state's flagship dark-sky sites are at their best for casual observing now — Great Basin National Park, an International Dark Sky Park whose Wheeler Peak high desert draws stargazers, the remote Massacre Rim Dark Sky Sanctuary, and the Tonopah-area basins all sit under some of the darkest skies in the country. Las Vegas observers reach genuinely dark desert within an hour's drive.
The spring sky gives way to early summer: the Big Dipper's handle arcs to brilliant Arcturus overhead and on to Spica, while Scorpius with red Antares begins to rise in the southeast, heralding the summer Milky Way. The globular cluster M13 in Hercules climbs into view, and the galaxies of Virgo and Coma still reward a telescope under dark skies. The Eta Aquariid meteor shower, debris from Halley's Comet, peaks in early May. The printable Nevada night-sky guide gives this year's planet positions and dark-sky dates.
Butterflies & Pollinators
May brings rich butterfly diversity to the Great Basin. The sagebrush, valley flowers, and aspen edges around Reno, Carson City, and the lower ranges fill with western tiger swallowtails along the rivers, pale swallowtails, Boisduval's and Melissa blues, juniper hairstreaks, sagebrush checkerspots, orange sulphurs, and an array of fritillaries beginning to emerge. Painted ladies and West Coast ladies are common in gardens.
In the Mojave south, the desert species fly on the late bloom — Mojave sootywings, marine and Mojave blues, queens, black swallowtails, and fiery and Mojave skippers. Monarchs are breeding now on milkweed in the irrigated valleys, their caterpillars feeding on showy and narrowleaf milkweed. The high ranges are just emerging, their first alpine fliers weeks away. Plant and protect showy milkweed and native nectar plants, and check the milkweed leaves for monarch eggs and caterpillars as the breeding season gets underway.
Trees This Month
May brings Nevada's trees into full leaf through the lowlands and mid-elevations. The riparian galleries are dense and green — Fremont cottonwood, willows, and water birch along every creek and river — and in the high canyons of the Rubies and Carson Range the quaking aspen groves are fully leafed and shimmering. The evergreen single-leaf piñon (state tree) flushes new growth and dusts the foothill woodland with reddish pollen, and Utah juniper sets its blue-gray berry-cones.
In the Mojave south, the desert trees are full — mesquite, palo verde, desert willow, and the Joshua trees setting green seed capsules after a good bloom. Up high, the limber pine, Engelmann spruce, and white fir push their bright candles of new growth as the snow recedes, and the ancient bristlecone pines on Wheeler Peak finally emerge from winter, developing their purple pollen cones. The trees mark the season climbing the ranges — full summer green in the valleys, new growth pushing up toward timberline.
Weather & Daylight
Across Nevada, a typical May day averages a high near 70°F and a low near 42°F, with about 1.1 inches of precipitation — statewide averages from the 1991–2020 U.S. climate normals.
Warm and increasingly humid, mild 40s mornings stretch into 70-degree afternoons perfect for being outside without a jacket.
| Average high | 70°F |
|---|---|
| Average low | 42°F |
| Precipitation | 1.1 in |
| Sunrise (mid-month) | 5:36 PT |
| Sunset (mid-month) | 19:49 PT |
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 (PT).
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Same month elsewhere: May in New Hampshire · May in New Jersey · May in New Mexico