July brings the monsoon — the dramatic afternoon thunderstorms that break the heat, green the desert, and trigger a second spring. The dry foresummer ends, the desert hums with new life, and the high country glows under towering clouds.
Week by week in July
July 2–8
- The monsoon arrives and within days the Arizona poppy and summer ephemerals burst from the greening desert floor.
- The green Chihuahuan grasslands ring with the flight songs of Botteri's and Cassin's Sparrows.
- The pleated saguaro swells visibly as it stores the sudden monsoon water in its accordion ribs.
- The monsoon opens a second planting window — sow another round of heat-lovers as humidity rises.
July 9–15
- The monsoon ignites Arizona's richest butterfly season in the southeastern canyons and grasslands.
- The Mogollon Rim and San Francisco Peaks meadows reach their wildflower peak with penstemon and paintbrush.
- Rufous and other migrant hummingbirds join the breeders at the sky-island feeders.
- On clear monsoon-break nights, the summer Milky Way arches overhead from Cygnus down to the galactic center.
July 16–22
- Black-necked Stilts and the first southbound shorebirds gather at desert ponds as fall migration begins.
- The monsoon greens the desert from gray-brown to lush within days as the washes run.
- Queens and monarchs gather at the milkweed and Empress Leilia haunts the desert hackberry.
- Cantaloupe, watermelon, and honeydew melons reach their summer peak in the warm valleys.
July 23–29
- Desert zinnia, summer sunflowers, and morning glory spread across the green monsoon desert.
- Sulphur-bellied Flycatchers and Elegant Trogons feed young in the sycamore sky-island canyons.
- Start fall tomato and pepper seeds indoors now for August transplanting into the mild autumn.
- Ocotillo leafs out a second time and sometimes reblooms after the soaking monsoon rains.
Birds This Month
The July monsoon kicks off a second breeding season across Arizona. As the rains green the desert and fill the washes, White-winged Doves and Mourning Doves nest again, Lesser Nighthawks and Common Poorwills course the humid dusk, and desert birds take advantage of the explosion of insects. The southeastern grasslands burst to life: Botteri's and Cassin's Sparrows sing on the wing over the green Chihuahuan grass, and Scaled Quail and Montezuma Quail move with their broods.
The sky islands are the summer birding draw. The monsoon brings a wave of late-arriving Mexican specialties and post-breeding hummingbirds to the canyons of the Huachucas, Chiricahuas, and Madera Canyon — feeder diversity peaks as Rufous and other migrant hummingbirds join the breeders, and rarities from Mexico appear in the wettest years. The Elegant Trogon and Sulphur-bellied Flycatcher are feeding young in the sycamores.
In the high country, the ponderosa and spruce-fir forests hold breeding Grace's, Red-faced, and Olive Warblers, Western Tanagers, and Steller's Jays. At desert ponds and the Salt River, Black-necked Stilts and shorebirds gather as southbound migration begins.
This month's tip: bird the southeastern sky islands and grasslands after a monsoon storm — the canyons fill with hummingbirds and Mexican rarities, and the green grasslands ring with the song of Botteri's and Cassin's Sparrows.
What's Blooming
The monsoon triggers a true second spring in the desert. Within days of the first rains, the summer ephemerals burst from the warming, wetting soil — Arizona poppy (a yellow summer flower, not the spring poppy), devil's claw, summer sunflowers, spiderling, and morning glory spread across the green desert floor. Desert zinnia, blanketflower, and roadside sunflowers bloom, and the desert hums with bees and butterflies feeding on the sudden nectar.
The high country reaches its wildflower peak with the monsoon. The Mogollon Rim and the San Francisco Peaks meadows fill with scarlet penstemon, lupine, Indian paintbrush, columbine, geranium, and the first asters and goldenrod. Rocky Mountain iris still color the wet meadows, and the aspen understory glows with summer flowers.
Where to look: drive a desert road a week after the first big monsoon storm to see the green desert spangled with Arizona poppy and summer wildflowers. For the richest bloom, head to the high meadows of Flagstaff's peaks and the Mogollon Rim, where the monsoon brings a magnificent mountain wildflower season.
Garden This Month
The monsoon transforms the low-desert garden in July. Once the rains arrive and humidity climbs, the punishing dry heat eases just enough to open a second planting window — sow another round of okra, black-eyed peas, melons, squash, cucumbers, and basil, and start seeds indoors for the all-important fall tomato and pepper crop that will go out in August. The monsoon rains soak the soil and take pressure off irrigation, but bring their own challenges: ease back watering after storms to avoid root rot, ensure good drainage, and stake or shelter plants against the violent storm winds and microbursts.
Give citrus a deep monsoon soak and watch for storm-toppled limbs. In the transitional and high country, July is peak summer — Prescott, the Verde Valley, and Flagstaff gardens are thriving on the rains, and the high-country harvest of greens, peas, and early squash is underway. Across the state, watch for monsoon-driven fungal problems in the sudden humidity, and enjoy the green relief the rains bring.
Zone 6b (Flagstaff and the high country): the heart of the short mountain season — cool-season crops thrive, and warm-season plants are sizing up under the monsoon. Hill and mulch potatoes, harvest greens and peas, and make the most of these few frost-free weeks before the high country cools again.
Zone 7a (Prescott, Verde Valley): peak summer growing — keep tomatoes, peppers, squash, beans, and corn well fed and watered, and enjoy the monsoon rains that take pressure off irrigation. Harvest steadily and watch for storm damage and humidity-driven fungal issues.
Zone 9b (Phoenix, Tucson, lower valleys): the monsoon opens a second planting window — once the rains arrive and humidity rises, sow another round of heat-lovers like okra, black-eyed peas, melons, squash, and basil, and start seeds for the fall tomato crop. Watch drainage in monsoon downpours, ease irrigation after storms, and stake plants against the strong storm winds.
What's at the Farmers Market
July markets balance the desert's summer crops with the start of the high-country season. From the warm valleys come melons — cantaloupe, honeydew, and watermelon at their peak — summer squash, zucchini, cucumbers, green beans, okra, eggplant, and the first green chiles. The earliest tomatoes from spring plantings and from cooler areas appear, along with abundant basil and summer herbs.
Choose melons that sound hollow and feel heavy for their size with a fragrant blossom end; pick firm glossy squash and eggplant and crisp beans. Keep whole melons at room temperature until cut, then refrigerate, and store squash, beans, and cucumbers in the crisper for a few days.
For selection and storage: the monsoon revives the markets after the hard, lean foresummer, and the high-country stalls around Flagstaff and Prescott are filling with cool-season greens and the first summer vegetables. Cure any onions and garlic you bought to store, and enjoy the melons at their summer best.
Night Sky This Month
July stargazing in Arizona means working around the monsoon — clear nights between storms reward patience with the summer Milky Way at its glorious best, and the dry-sky windows offer spectacular views. The high, dark country of Flagstaff, the Grand Canyon, and the Mogollon Rim, and the southern desert sites like Kitt Peak, all deliver superb summer skies when the clouds clear. Watch the towering monsoon thunderheads at dusk — they make for dramatic skywatching of their own, with lightning and mammatus clouds.
On a clear night, the summer Milky Way arches overhead in full splendor, its bright star clouds pouring through Cygnus overhead and down into Scorpius and Sagittarius in the south, where the galactic center hangs above the horizon — Arizona's southern latitude shows it beautifully. The Summer Triangle of Vega, Deneb, and Altair rides high, and the heart of the galaxy bristles with star clusters and nebulae for binoculars.
July's nights are warm and short, but the Milky Way makes them unforgettable. For this year's exact planet positions and the best moonless nights, see the printable Arizona night-sky guide.
Butterflies & Pollinators
The monsoon ignites Arizona's greatest butterfly season — the wet summer is the peak of butterfly diversity, especially in the southeast, which is famous among butterfly watchers as the richest region in the country. As the rains green the desert and grasslands, dozens of species emerge: Queens and monarchs at the milkweed, Two-tailed and Pipevine Swallowtails, Gulf and Variegated Fritillaries, and clouds of sulphurs and whites over the blooming flats.
The sky-island canyons and grasslands explode with specialties: Arizona Sister, Bordered Patch, Texan and Tiny Checkerspots, dozens of skippers and hairstreaks, and rare Mexican strays that cross the border with the summer rains. Empress Leilia haunts the desert hackberry, and the metalmarks and blues are out in force on the summer wildflowers.
To help them: the monsoon bloom is a feast — leave the Arizona poppy, summer sunflowers, and milkweed standing, and keep garden nectar like lantana and zinnia going. Plant native milkweed, passionvine, and pipevine, provide a damp puddling spot, and avoid spraying during this richest butterfly season of the Arizona year.
What to plant for them is in the Arizona native plants guide
Trees This Month
The monsoon revives Arizona's trees. With the first soaking rains, the palo verde and ocotillo leaf out again, the ocotillo sometimes flowering a second time, and the pleated saguaro swells visibly as it stores the sudden water in its accordion ribs. Mesquite and ironwood flush new growth, and the desert washes run, recharging the cottonwoods and willows along the riparian corridors. The desert turns from gray-brown to green within days.
The high country drinks deeply too. The monsoon storms soak the ponderosa pine forests of the Mogollon Rim and the aspen, fir, and spruce of the San Francisco Peaks, easing the spring fire danger and fueling lush summer growth. The Arizona sycamores, bigtooth maples, and walnuts in the sky-island canyons thrive in the humid air. From desert to mountaintop, the monsoon is the year's great green renewal, and the saguaros and palo verdes drink in the moisture that carries them through the year.
Weather & Daylight
Across Arizona, a typical July day averages a high near 95°F and a low near 67°F, with about 1.6 inches of precipitation — statewide averages from the 1991–2020 U.S. climate normals.
Blistering afternoons near 95 degrees give way to muggy monsoon downpours as warm nights barely dip below 67.
| Average high | 95°F |
|---|---|
| Average low | 67°F |
| Precipitation | 1.6 in |
| Sunrise (mid-month) | 5:26 MT |
| Sunset (mid-month) | 19:38 MT |
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 (MT).
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One short note when Arizona's next month turns — what's arriving, blooming, and worth a night outside.
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Same month elsewhere: July in Arkansas · July in California · July in Colorado