What to Wear in Jackson Hole in August 2026
Jackson Hole in August is peak Hootenanny + Grand Teton Music Festival closing weekend — 26°C / 79°F afternoons, 4°C / 39°F mornings, 8 rain days.
- Lightweight cotton + linen daytime — Cascade Canyon + Lake Solitude
- Hoka Speedgoat or Salomon Sense Ride trail shoe
- Stio cotton button-down + Mountain Khakis canvas
- Patagonia Houdini packable shell — afternoon-thunderstorm
- Mineral SPF 50 + wide-brim sun hat — UV index 10 at altitude
- Lightweight cashmere wrap — sunset drops 22°C / 40°F
- Heavy wool — daytime 26°C / 79°F
- Formal leather — Cascade Canyon trail dust + creek crossings
- Single-layer cotton at evening — sunset drops 22°C / 40°F
Jackson Hole in August runs Greater Yellowstone peak-hike + Grand-Teton-Music-Festival-closing-weekend. NOAA Jackson WY data put afternoon highs at 26°C / 79°F and overnight lows at 4°C / 39°F with 8 precipitation days; the heritage afternoon-thunderstorm pattern hits 14:00-17:00 daily August through early September. UV index 10 (extreme) by 11am at the 6,200 ft elevation. Local register: Stio (East Broadway — Stio Cobble Run cotton button-down + Stio Cottonwood overshirt), Mountain Khakis (Glenwood Street since 2003 — recognized Cobalt summer-weight cotton-canvas pant), Jackson Hole Hat Company (Cache Street custom-cowboy hatter), MADE (Roxanne Wilson's contemporary-craft), Jack Dennis Fly Shop (Cache Street since 1967), Skinny Skis (East Broadway outdoor-and-trail). Heritage anchors: Grand Teton National Park (1929 establishment), Hootenanny at Dornan's (Mondays at Moose, the heritage 60-year-old open-mic), Snake River fly-fishing (cutthroat-trout fishery), Town Square arches since 1953, Snake River Float, the heritage Grand Teton Music Festival (1962-founded classical-music summer festival at Walk Festival Hall in Teton Village — closing weekend early August). Festivals: Hootenanny at Dornan's (Mondays through early September), Grand Teton Music Festival closing-weekend (early August at Walk Festival Hall — the heritage GTMF Orchestra closing-weekend gala), the heritage Jackson Hole Fall Arts Festival preview (the heritage early-September Festival starts ramping up programming late August). Skip heavy wool — daytime 26°C / 79°F.
Jackson Hole August is Cascade Canyon at 6:30am, Lake Solitude by 13, Hootenanny at Dornan's Monday by 19, Grand Teton Music Festival closing-weekend at Walk Festival Hall by 20. Lightweight cotton + Hoka Speedgoat + Patagonia Houdini + cashmere wrap.
The capsule
- Lightweight cotton midi sundress + lightweight cardigan — NOAA Jackson WY logs 26°C / 79°F afternoons in August with the heritage afternoon-thunderstorm pattern. Cotton midi (Doen, Faherty, Réalisation Par) in oat, sand, sage, or ivory. Lightweight cardigan layers for the post-thunderstorm chill.
- Stio Cobble Run cotton button-down + Mountain Khakis Cobalt cotton-canvas pant — Stio (the heritage 2012 Jackson-founded technical-mountain-and-town outerwear) Cobble Run cotton button-down in oat, navy, or sage + Mountain Khakis Cobalt summer-weight cotton-canvas pant in walnut or sand reads correct at the heritage Snake River Brewing wood-deck + Hand Fire Pizza + Persephone Bakery.
- Hoka Speedgoat 5 or Salomon Sense Ride 5 trail shoe — Jackson Hole August daytime hike obligation: Cascade Canyon (4.5-mile in-and-back from Jenny Lake boat-shuttle), Lake Solitude (8.6-mile out-and-back to alpine cirque-lake at 9,035 ft — peak August snow-clear window), Surprise Lake + Amphitheater Lake (10-mile out-and-back from the heritage Lupine Meadows trailhead to alpine lakes at 9,540-9,698 ft / 2,908-2,956 m — the recognized Cathedral Group + Garnet Canyon panoramic-overlook hike), Paintbrush Divide (the recognized 19.2-mile loop via String Lake + Paintbrush Canyon to Holly Lake + Paintbrush Divide at 10,720 ft / 3,267 m — the recognized Cathedral Group panoramic-overlook + Lake Solitude descent loop), Hidden Falls (0.5-mile from boat-shuttle dock), Phelps Lake (5-mile loop). Hoka Speedgoat (5mm-lug Vibram Megagrip) or Salomon Sense Ride 5.
- Patagonia Houdini packable shell or Arc'teryx Squamish Hoody — Teton Range orographic-lift afternoon-thunderstorm pattern hits 14:00-17:00 daily August through early September — Cascade Canyon + Lake Solitude + Death Canyon summit lightning-strike hazard. Patagonia Houdini (3.7 oz nylon ripstop). Skip umbrellas — wind on Cascade Canyon ridge inverts.
- Loro Piana cashmere wrap + Hermès silk scarf — for evening — The heritage Hootenanny at Dornan's drops 22°C / 40°F at sunset — 19:00 first-set start meets 21:00 sunset meets 22:30 final set at 4°C / 39°F. The heritage Walk Festival Hall Grand Teton Music Festival closing-weekend evening reads 6-8°C / 43-46°F by 22:00 in Teton Village 6,400 ft elevation. Loro Piana cashmere wrap (Quarona Piemonte 1924) or Brunello Cucinelli alpaca shawl over the cotton midi. Skip single-layer cotton at Hootenanny + GTMF closing — Jackson-locals decode the un-Jackson register instantly.
- Mineral SPF 50 + wide-brim straw hat — UV index 10 (extreme) by 11am at 6,200 ft elevation. Alpine-tundra reflectance at Cascade Canyon + Lake Solitude doubles UV exposure to UV 14+ equivalent. Mineral SPF 50 mandated at Phelps Lake + Jenny Lake swimming holes per Grand Teton NPS guidance. Wide-brim straw hat (Stetson Open Road silver-belly straw at Jackson Hole Hat Co.) brim 4 inches minimum.
- Stio Hometown Down vest + lightweight wool gloves — The heritage 6am Cascade Canyon dawn or Lake Solitude alpine-cirque sunrise reads 4°C / 39°F at altitude even in August; the heritage Mt. Moran + Cathedral Group sunrise photographic register requires 5:30am arrival. Stio Hometown Down vest (Stio's 700-fill responsibly-sourced down) + lightweight wool gloves + Smartwool merino buff.
- Crossbody bag + 2L water + cash USD + bear spray + binoculars — Jackson Hole August walking demands hands-free for Town Square + the heritage Saturday Farmers' Market on Town Square + Snake River Float dock at Moose. Bear spray (Counter Assault or UDAP, $50 at Jack Dennis Outdoor Shop) — National Park Service requires 'bear spray' specifically per the heritage 2008 Yellowstone-Grand Teton guidance. Binoculars (Leica or Swarovski 8x42 or 10x42) for the heritage Mormon Row + Antelope Flats wildlife-corridor register (the heritage August pre-elk-rut bull-staging window).
Day to night
Stio Cobble Run cotton button-down + Mountain Khakis Cobalt canvas + Hoka Speedgoat 5 · Stetson Open Road straw hat · Persol polarized · Patagonia Houdini packable shell + Stio Hometown Down vest · 2L water bottle + bear spray + binoculars + daypack. Cascade Canyon trailhead at Jenny Lake boat-shuttle 6:30am, Lake Solitude alpine-cirque 13:00, Persephone Bakery lunch 14:30.
Cotton midi or Stio cotton button-down + Mountain Khakis canvas · Loro Piana cashmere wrap · leather sandals or block heel · cotton silk scarf · crossbody. Snake River Brewing wood-deck 17:00, Hand Fire Pizza dinner 18:30, Hootenanny at Dornan's Monday 19:00 (open-mic finale 22:30), Walk Festival Hall Grand Teton Music Festival closing-weekend concert 20:00.
What to avoid
- Heavy wool — daytime 26°C / 79°F at altitude
- Formal leather — Cascade Canyon trail dust + creek crossings
- Umbrellas — wind on Cathedral Group passes inverts
- Non-mineral sunscreens — Phelps + Jenny Lake watershed
- Single-layer cotton at Hootenanny + GTMF — sunset drops 22°C
- GTMF closing-weekend without 30-day-ahead reservation
Frequently asked questions
Per NOAA Jackson WY data: average daily high 26°C (79°F), low 4°C (39°F), 8 precipitation days (the heritage afternoon-thunderstorm pattern hits 14:00-17:00 daily August through early September). UV index 10 (extreme) by 11am at the 6,200 ft elevation. Daylight 14h 5m. The 22°C / 40°F diurnal swing means morning Cascade Canyon trail 6:30am reads 4°C / 39°F + afternoon Town Square walking reads 26°C / 79°F + evening Hootenanny at Dornan's reads 4-6°C / 39-43°F by 22:30.
Yes — August is recognized peak-snow-clear hike-window for Lake Solitude + Paintbrush Divide + Surprise Lake + Amphitheater Lake. Lake Solitude (the heritage 8.6-mile out-and-back from Jenny Lake boat-shuttle to alpine cirque-lake at 9,035 ft — the recognized 'all-day Grand Teton hike' anchor). Paintbrush Divide (the heritage 19.2-mile loop via String Lake + Paintbrush Canyon to Holly Lake + Paintbrush Divide at 10,720 ft / 3,267 m, descending via Lake Solitude + Cascade Canyon — the recognized Cathedral Group + Teton Range panoramic-overlook circuit, peak alpine-wildflower window mid-August). Surprise Lake + Amphitheater Lake (10-mile out-and-back from the heritage Lupine Meadows trailhead to alpine lakes at 9,540-9,698 ft / 2,908-2,956 m — the recognized Cathedral Group + Garnet Canyon panoramic-overlook hike). Pack: Hoka Speedgoat 5 + Stio Cobble Run + Mountain Khakis Cobalt canvas + bear spray + Patagonia Houdini packable shell + Stio Hometown Down vest + 3L water + mineral SPF 50 + Stetson Open Road straw + cash USD + Grand Teton Park-Pass.
The heritage Grand Teton Music Festival closing weekend is the recognized first weekend of August at the heritage Walk Festival Hall in Teton Village (the heritage 1962-founded classical-music summer festival, the heritage Sir Donald Runnicles music director since 2006). The recognized programming: GTMF Orchestra closing-weekend gala (Friday-Saturday-Sunday — the heritage 'Festival Orchestra finale' programming with the heritage GTMF chamber-music + the heritage GTMF Inon Barnatan piano-residency closing). Tickets: $30-150 per person; book 30 days ahead absolutely. The heritage 2026 GTMF closing-weekend runs early August (verify at gtmf.org). Pack: lightweight wool blazer + Brunello Cucinelli cashmere knit + Mountain Khakis canvas + R.M. Williams or Frye Carson + Loro Piana cashmere wrap + Hermès silk scarf + crossbody.
The heritage Hootenanny at Dornan's is the heritage 60-year-old Jackson-Wilson-Moose-corridor Monday-night open-mic at the heritage Dornan's open-air deck overlooking the Snake River + the Cathedral Group of the Grand Teton (Moose, 13 miles north of Jackson — the heritage 1948 Dornan's family-owned restaurant + bar + RV park complex at Moose Junction inside Grand Teton National Park). Mondays 7-10pm June through early September. Free admission. The heritage open-mic register: anyone can sign up. Pack: cotton midi or Stio cotton button-down + Mountain Khakis canvas + Loro Piana cashmere wrap + leather sandal — sunset drops 22°C / 40°F by the 22:30 finale. The heritage 25-minute drive from Jackson Town Square to Moose via Highway 191 + Moose Junction.
The heritage Snake River Brewing (East Broadway since 1994); the heritage Million Dollar Cowboy Bar (Cache Street since 1937); the heritage Persephone Bakery (East Broadway French-bakery + breakfast); the heritage Hand Fire Pizza (Glenwood Street); the heritage Glorietta (East Broadway contemporary-Italian, since 2018); the heritage The Kitchen (East Broadway contemporary American); the heritage Bin 22 (East Broadway wine-bar + small-plates); the heritage Local Restaurant + Bar (East Broadway Wyoming-farm-to-table); the heritage Mangy Moose (Teton Village base since 1967 — the recognized GTMF closing-weekend pre-show register); the heritage Dornan's at Moose (since 1948); the heritage Jenny Lake Lodge dining room (the heritage 1924 lodge inside Grand Teton National Park — the heritage 6-course tasting menu, jacket required); the heritage Couloir at Jackson Hole Mountain Resort (the recognized 10,450 ft summit gondola-accessed restaurant). Pack: cotton midi + Mountain Khakis canvas + Loro Piana cashmere wrap + leather sandal or block heel for evening; cotton button-down + Hoka Speedgoat for daytime.
