Great Basin Weather: Forecasts, Climate, and Current Conditions

By Jocelyn Pion · Data: National Park Service · ← Complete guide Great Basin

Great Basin National Park spans nearly 7,900 feet of elevation between the valley, at about 5,200 feet, and the summit of Wheeler Peak, at 13,064 feet. The weather follows that gradient closely. In a single day, you can move through several climate zones without changing your itinerary.

The short version: Great Basin has a high-elevation continental desert climate. Summer mornings are hot and dry, with temperatures of 77 to 84°F at the park entrance. Severe thunderstorms roll in during the afternoons from July through August, and winters are cold and snowy above 6,600 feet. Nights stay cool year-round, and the day-to-night temperature swing often exceeds 15 to 20°F.

Great Basin Climate Month by Month

The table below shows monthly averages at the park entrance, around 6,824 feet. As you climb toward Wheeler Peak, temperatures drop by 11 to 14°F for every additional 3,300 feet of elevation.

Averages at the park entrance (about 6,824 feet). Source: Open-Meteo.

Annual precipitation at the park entrance is about 11 inches, which is typical of a cold desert. Most precipitation falls as snow in winter and during the summer monsoon.

Great Basin Climate by Season

Winter (December through February)

Winter brings a rare sense of solitude and silence. Overnight temperatures at the park entrance regularly drop below 18°F, and they fall even lower at higher elevations. Wheeler Peak Scenic Drive can close from one day to the next depending on snowfall. Lehman Caves stays open year-round and remains at a steady 50°F, making it the season's signature attraction. If you're visiting in winter, bring full mountain gear even if you're only driving to the visitor center parking lot.

Spring (March through May)

Spring arrives cautiously in Great Basin. In March and April, snow returns in bursts as high as mid-elevation areas, and high-mountain trails remain snow-covered long after the last storms. May marks a real turning point: the valley warms up, afternoon highs approach 64°F, and low- and mid-elevation trails become usable again. At the summit of Wheeler Peak, snowpack lasts into June and sometimes early July after heavy-snow winters.

Summer (June through August)

Peak season follows a clear two-part rhythm. Mornings bring cloudless skies, dry air, beautiful light, and quickly rising temperatures, reaching 77 to 84°F at the park entrance in July. In the afternoon, monsoon thunderstorms develop almost every day between 1 and 5 p.m., bringing intense lightning, wind gusts, and possible hail. Ridges and summits become dangerous. The rule is simple: start exposed hikes by 8 a.m. at the latest so you can be back down before noon. At Wheeler Peak, summer highs top out around 54 to 59°F.

Fall (September through November)

This is a favorite season for much of the team. Thunderstorms move out by mid-September, daytime temperatures stay mild at 61 to 72°F, and late-afternoon light on the Engelmann spruce is one of the park's most rewarding surprises. Clear fall skies also reinforce Great Basin's status as a dark-sky park, one of the least light-polluted in the United States. In October, the first snow outlines the ridges above 9,800 feet. By November, the park gradually shifts into winter mode.

Is Great Basin Cold or Hot? Records and Extremes

Both, depending on the elevation and the time of day. Great Basin is a cold desert, not a hot desert like the Mojave. At the park entrance in midsummer, highs can climb above 86°F during heat waves. That same night, in the same spot, the thermometer may drop below 46°F. A 36°F swing in 24 hours is common and catches visitors off guard when they pack for only one kind of weather.

At higher elevations, snow can fall at Wheeler Peak in any month of the year. In winter, wind makes the cold feel much more intense. With temperatures at 5°F and gusts reaching 37 mph, the wind chill can fall well below -13°F. Take it seriously.

What to Wear by Season

The basic rule is universal here: layer up, no matter the season.

Spring and fall. Wear a breathable base layer, fleece, and a lightweight waterproof shell during the day. Add a packable puffy jacket for mornings and evenings, which are often very cold even in May or September.

Summer. Wear lightweight, breathable clothing in the morning. Bring SPF 50+ sunscreen, a wide-brimmed hat, and sunglasses. Keep a lightweight rain shell for afternoon thunderstorms in your pack, along with at least 2 liters of water per person for every half-day. Great Basin's very dry air can dehydrate you before you realize it.

Winter. Wear thermal layers, warm gloves, a hat, and gaiters for snowy trails. Lightweight traction cleats, such as Yaktrax, are strongly recommended on icy paths. If you're visiting Lehman Caves, bring an extra layer. The cave stays at 50°F year-round, which feels refreshing in July but biting in January.

Weather Alerts and Conditions to Watch

Monsoon thunderstorms (July and August). Lightning is the main danger on ridges and exposed terrain. Check the National Weather Service forecast at weather.gov every morning before you set out. Coming down from Wheeler Peak before 1 p.m. is a safety rule, not a suggestion.

Road closures. Wheeler Peak Scenic Drive may close from November through May depending on snowfall, sometimes overnight. Check operating conditions at nps.gov/grba the day before every outing.

High-elevation wind. On ridges above 9,800 feet, gusts regularly reach 37 to 50 mph. The wind chill can feel very different from the temperature on the display.

Frequently Asked Questions