Great Basin in May: Crowds, Weather & What to Pack
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May is one of the best months of the year to visit Great Basin National Park: crowds run 58% of the July peak (15,173 average visits). Weather: highs average 64°F and lows 40°F, with 1.3″ of precipitation and 14.3 hours of daylight. Computed from NPS and NOAA data.
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Bring for Great Basin in May
- Warm mid-layer (fleece or light puffy)See it on AmazonWhy: mornings average 40°F.
- Sturdy, broken-in hiking bootsSee it on AmazonWhy: every park, every month.
- Water bottles for the daySee it on AmazonWhy: hydration is one of the NPS Ten Essentials.
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Great Basin in May: what the park service says
May brings desert colour to Great Basin as prickly-pear cactus, Indian paintbrush and globe mallow bloom, the park says, even while the high elevations keep their snowpack. Afternoons at Lehman Caves reach the mid-60s°F. Most park roads typically open around Memorial Day, depending on snow, and thunderstorms begin to appear, with about five in an average May. Lehman Caves tours can be reserved up to 30 days ahead, and park operations are cashless, so pay by credit or debit card.
Source: NPS 1, NPS 2, NPS 3, checked 2026-11-05.
Crowds in May
Great Basin averages 15,173 recreation visits in May — 58% of what July, the peak month, draws. Plan lodging and entries with that in mind.
Weather & daylight
Daytime temperatures are comfortable (highs average 64°F), and mornings are chilly (lows average 40°F). It is typically dry (1.3″ of precipitation). Mid-month daylight runs 14.3 hours.
NOAA 1991–2020 monthly normals, station GREAT BASIN NP, NV US (0 mi from park coordinates, 6,850 ft elevation) — conditions vary inside the park, especially with elevation. Daylight computed for the 15th of May.
What to pack for Great Basin in May
Computed from the month's weather normals above — not a generic list.
- Warm mid-layer (fleece or light puffy) — mornings average 40°F
- Sturdy broken-in footwear, navigation and a basic first-aid kit — every park, every month
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Also at their best in May
Other parks whose computed May verdict is a best window — same NPS × NOAA formula:
- Lake Clark in May — 7% of peak crowds, highs 59°F, score 96/100
- North Cascades in May — 11% of peak crowds, highs 69°F, score 96/100
- Katmai in May — 1% of peak crowds, highs 52°F, score 95/100
- Gates of the Arctic in May — 12% of peak crowds, highs 56°F, score 94/100
Common questions
Is Great Basin crowded in May?
Moderately: May runs 58% of the July peak, averaging 15,173 visits (NPS, 2021–2025). See every month at Great Basin.
What is the weather like in Great Basin in May?
Average highs of 64°F, lows of 40°F, 1.3″ of precipitation (NOAA 1991–2020 normals, GREAT BASIN NP, NV US station). Compare it with other national parks in May.
What should I pack for Great Basin in May?
Warm mid-layer (fleece or light puffy); Sturdy broken-in footwear, navigation and a basic first-aid kit — the full weather-computed list is on this page. Going in June instead? Great Basin in June has its own list.
See also: the best national parks to visit in May · Last verified 2026-09-24