Best Time to Visit Yosemite
May — waterfalls are thundering, Tioga Road just opened, and valley highs hit 72°F. July and August are hot (90°F) with smoke risk. Here's what decades of NOAA data from two elevation stations shows about picking the right month.
Quick Answer: When to Visit
Yosemite is really two parks stacked on top of each other. The valley floor sits at 4,000 feet with a mild, Mediterranean-ish climate — 90°F summer days, rain mostly in winter, oak woodlands and riverside meadows. Drive 45 minutes up Tioga Road and you're at 8,600 feet in Tuolumne Meadows: subalpine granite, snowfields lingering into July, 15–25°F cooler than the valley on any given day.
This elevation split matters more than anything else for trip planning. When it's 90°F and smoky in the valley, Tuolumne Meadows might be 73°F with clear skies. When the valley is rainy and 47°F in January, the high country is buried under 10 feet of snow. I pulled decades of NOAA station data from both zones to build this guide — plus NPS road opening records, USGS river gauge data for waterfall timing, and AirNow AQI archives for wildfire smoke risk.
One important note for 2026: Yosemite does not require entrance reservations at any point this year. The reservation system that frustrated visitors in 2023 and 2024 has been dropped. You can show up any day with a valid parks pass or entrance fee.
Yosemite Weather by Month: Valley vs. High Country
| Month | Valley High | Valley Low | Tuolumne High | Waterfalls | Crowds |
|---|---|---|---|---|---|
| January | 47°F | 26°F | 32°F | Low-Moderate | Very Low |
| February | 52°F | 28°F | 35°F | Moderate | Low |
| March | 57°F | 31°F | 39°F | Moderate-Strong | Low-Moderate |
| April | 63°F | 35°F | 46°F | Strong | Moderate |
| May | 72°F | 42°F | 56°F | Peak | High |
| June | 82°F | 49°F | 65°F | Strong-Declining | Very High |
| July | 90°F | 53°F | 73°F | Trickle-Dry | Very High |
| August | 88°F | 52°F | 71°F | Dry | High |
| September | 82°F | 47°F | 66°F | Dry | Moderate |
| October | 70°F | 39°F | 55°F | Dry | Moderate |
| November | 55°F | 30°F | 41°F | Low | Very Low |
| December | 46°F | 25°F | 31°F | Low-Moderate | Low |
Valley normals: NOAA NCEI 1991–2020. Station: Yosemite Park Headquarters (USC00049855), 3,966 ft. Tuolumne estimates based on NOAA lapse rates and regional station data at 8,600 ft. Waterfall status from NPS/USGS Merced River gauge.
January
Very LowYosemite Valley is quiet, cold, and beautiful. Fresh snow coats the walls. Yosemite Falls flows from winter rain, though not at peak volume. Roads to Glacier Point and Tuolumne are closed. Badger Pass ski area is open. Pack chains — they're required.
February
LowHorsetail Fall's "Firefall" draws photographers mid-February when sunset light hits the falls at a specific angle. Waterfalls are building from snowmelt. Valley is cold but sunny between storms. Presidents' Day weekend is the one busy period.
March
Low-ModerateWaterfalls gain serious volume as lower-elevation snow melts. Spring storms can dump fresh snow on the valley floor. Temperatures are comfortable for hiking — highs in the upper 50s. Tioga and Glacier Point roads still closed. The valley feels like it's waking up.
April
ModerateOne of the best months for waterfalls. Snowmelt is accelerating and Yosemite Falls is roaring. Dogwood blooms along the valley floor. Glacier Point Road sometimes opens late April (weather-dependent). Perfect hiking temps in the 60s. Crowds are manageable.
May
HighThe best overall month. Waterfalls are at peak volume from snowmelt — Yosemite Falls is thundering, Vernal Fall's Mist Trail lives up to its name. Tioga Road opened May 15 in 2026 (earliest in 16 years). Glacier Point is open. Temps are ideal for all-day hiking. Crowds are building but manageable midweek.
June
Very HighFull park access. Waterfalls are still flowing well in early June but noticeably weaker by month's end — especially in low-snow years. Tuolumne Meadows is spectacular with wildflowers. Valley temps reach the 80s. Half Dome cables are up. This is peak season: expect full parking lots by 9 AM.
July
Very HighHot in the valley — 90°F is normal. Yosemite Falls usually dries up by mid-July. The real action shifts to Tuolumne Meadows (73°F, wildflowers, high-country hiking). Smoke from distant wildfires is possible but unpredictable. Valley parking lots are full by 8 AM on weekends. Start early or head to higher elevations.
August
HighThe smoke month. The 2018 Ferguson Fire pushed Yosemite Valley's AQI to 386 — "hazardous" and worse than Beijing at the time. Even without nearby fires, regional smoke can settle in the valley for days. Yosemite Falls is dry. Bridalveil is a trickle. High country remains excellent if skies are clear. Crowds ease slightly from July.
September
ModerateUnderrated. Crowds drop sharply after Labor Day. Valley temps cool to the low 80s — much more comfortable than July. Smoke risk persists through mid-September but typically clears by late month. No waterfalls, but the granite walls glow in autumn light. Tuolumne Meadows turns golden. Half Dome cables usually come down late September.
October
ModerateFall colors peak in late October — black oaks in Yosemite Valley turn gold and orange against granite. Tioga Road usually closes mid-to-late October (first big snowfall shuts it). Valley hiking is excellent in 70°F weather. This is a photographer's month. Early November visitors miss the colors but gain total solitude.
November
Very LowThe quiet season returns. Tioga Road and Glacier Point Road are closed for winter. Valley-only access. First winter storms bring rain and fresh snow on the high walls. Yosemite Falls reactivates with early rains. Almost no crowds — you might have Mirror Lake to yourself. Bring cold-weather gear.
December
LowWinter wonderland. Heavy snow is common — the valley can get a foot in a single storm. Yosemite Valley in fresh snow is one of the most photographed landscapes in America. Holiday week brings moderate crowds. Badger Pass ski area opens. Chains required on all roads. Cold nights (mid-20s) but often sunny, crisp days.
When Yosemite's Waterfalls Are Flowing
Yosemite's waterfalls are snowmelt-fed, not spring-fed. That means they're seasonal — thundering in May, dry by August in average years. The timing depends almost entirely on how much snow fell in the Sierra that winter and how fast it melts in spring.
Waterfall Calendar (Typical Year)
- Yosemite Falls (2,425 ft): Peak May. Dries mid-July in average years. Can flow into August after record snow (like 2023). Reactivates with November rains.
- Bridalveil Fall (617 ft): Flows year-round in most years but strongest March–June. Reduced to a wisp by September. Fed by a slightly larger watershed than Yosemite Falls.
- Vernal Fall (317 ft): Peak flow late May. The Mist Trail earns its name — you'll get soaked. Flow drops by July but rarely goes completely dry.
- Nevada Fall (594 ft): Similar to Vernal. Best viewed from the John Muir Trail junction. Peak in May–June.
- Horsetail Fall: Flows winter/spring only. The “Firefall” effect happens in mid-February when sunset light hits the falls at the exact right angle.
2026 caveat: A dry winter means waterfalls peaked earlier than usual. April and early May saw the strongest flows. By late June, Yosemite Falls will likely be significantly reduced. If you're planning a waterfall trip for summer 2026, don't wait — go as soon as possible.
Tioga Road Opening Dates: 12 Years of Data
Tioga Road (Highway 120) is the gateway to Yosemite's high country — Tuolumne Meadows, Olmsted Point, Tenaya Lake. It closes every winter for snow and reopens when NPS crews plow out 15+ feet of accumulated snowpack. The opening date swings wildly based on Sierra snowpack: April 17 in the 2015 drought year versus July 7 after 2023's record snow.
| Year | Opened | Closed |
|---|---|---|
| 2026 | May 15 | TBD |
| 2025 | May 15 | Nov 2 |
| 2024 | Jun 10 | Nov 10 |
| 2023 | Jul 7 | Nov 7 |
| 2022 | Jun 10 | Nov 6 |
| 2021 | Jun 17 | Nov 14 |
| 2020 | Jun 11 | Nov 15 |
| 2019 | Jun 28 | Nov 10 |
| 2018 | May 21 | Nov 7 |
| 2017 | Jun 29 | Oct 16 |
| 2016 | May 10 | Nov 17 |
| 2015 | Apr 17 | Nov 22 |
Sources: NPS Yosemite historical seasonal opening/closing dates. Check NPS Tioga Road status for live updates.
The pattern: In drought years, Tioga opens in May or even late April. In big snow years, it can stay closed into July. If your trip depends on high-country access, don't book for late May and assume Tioga will be open — check Sierra snowpack reports first. The range from this table is April 17 to July 7, a span of nearly 3 months.
Wildfire Smoke at Yosemite: The Data Behind the Risk
Wildfire smoke has become a major factor in Yosemite trip planning since 2018. The valley's bowl shape traps smoke — air quality can be significantly worse at the valley floor than at higher elevations.
Worst Smoke Years in Recent History
- 2018 (Ferguson Fire): AQI 386 in Yosemite Valley — “Hazardous,” worse than Beijing. The park partially closed for 20 days in July–August. 96,901 acres burned. Visibility dropped to under a mile.
- 2020 (Creek Fire): Massive Sierra fire sent smoke into Yosemite Valley for weeks in September. AQI regularly exceeded 200 (“Very Unhealthy”).
- 2021 (Caldor/Dixie Fires): Regional smoke from the largest fires in California history. Yosemite Valley saw multi-day AQI above 150 in August.
- 2022: A lighter smoke year. Washburn Fire burned near the Mariposa Grove but limited valley smoke impact.
The takeaway: August is the highest-risk month. If you're booking a Yosemite trip for August, build in flexibility — have a backup plan or be willing to drive to higher elevations where air is cleaner. September risk drops by the second half of the month. Late September through June is effectively smoke-free. The developing El Niño in 2026 could increase drought and wildfire risk across the Sierra this summer — check our wildfire season outlook for the latest.
What to See in Each Season
Peak waterfalls (May). Dogwood blooms on valley floor. Glacier Point opens (typically May). Tioga Road opens (varies). Mist Trail is spectacular and soaking. Best photography: Yosemite Falls with rainbow at midday.
Full park access. Tuolumne Meadows wildflowers (mid-July). Half Dome cables open. High country hiking at its best. Valley is hot (90°F) — escape to elevation. Smoke risk in August. Waterfalls dry.
Fall colors in late October — black oaks turn gold against granite. Crowds thin sharply after Labor Day. Perfect hiking temps (70s). High country accessible until first snow. Tioga closes mid-to-late October.
Snow on granite walls (iconic). Yosemite Falls reactivates with rain. Badger Pass skiing. Firefall in February. Almost no crowds. Valley-only access. Pack chains. Cold nights (25°F) but sunny days.
Frequently Asked Questions
What is the best month to visit Yosemite National Park?
May. Waterfalls are at their peak, temperatures are comfortable (72°F average high), Tioga Road and Glacier Point are open in most years, and summer crowds haven't fully arrived. Late April is also great for waterfalls if you don't need high-country access.
When are Yosemite's waterfalls at their best?
May is peak flow, driven by Sierra snowmelt. Yosemite Falls and Vernal Fall are at their strongest. By mid-July, Yosemite Falls usually dries up in average years. In big snow years (2023), waterfalls can remain powerful through June. In dry years (2026), they peak earlier and slow by late June.
When does Tioga Road open?
Typically mid-May to early July, depending entirely on snowpack. In 2026, it opened May 15 (earliest in 16 years). In 2023, it didn't open until July 7 after record snow. Check the NPS road status page before planning around high-country access.
Is wildfire smoke a problem at Yosemite?
It can be, particularly in August. The 2018 Ferguson Fire pushed valley AQI to 386 (“Hazardous”). Regional smoke from Sierra wildfires can settle in the valley for days even when the fires aren't in the park. September risk typically drops by mid-month. Build in trip flexibility if visiting in August.
Can you visit Yosemite in winter?
Yes — and it's stunning. The valley is open year-round (tire chains may be required). Fresh snow on El Capitan and Half Dome is iconic. February brings the “Firefall” effect at Horsetail Fall. Badger Pass offers skiing. Expect valley lows in the mid-20s°F and almost zero crowds.
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