July in Grand Teton National Park is a best window month: highs around 79°F, lows around 41°F. Crowds: peak crowds — #1 busiest of the park's 12 months. It is the park's warmest month of the year. Wildflower peak and every trail here is typically snow-free — also the busiest month of the year. The editorial best window here is July & September. You get about 15h 07m of daylight. To finish Paintbrush Canyon–Cascade Canyon Loop (8h 50m) before dark, leave the trailhead by about 12:09 PM.
Month data reviewed · how we check this
| Verdict | Best window The editorial pick — weather, access and experience line up. |
|---|---|
| Temps °F | 79° high / 41° low — the park's warmest month |
| Crowds | peak crowds · #1 busiest of the park's 12 months |
| What July is like | Wildflower peak and every trail here is typically snow-free — also the busiest month of the year |
| Best window (whole year) | July & September |
| Peak crowds (whole year) | Jul–Aug |
CROWDS: RELATIVE SEASONALITY FROM NPS VISITATION STATISTICS · TEMPS: APPROXIMATE NOAA NORMALS AT MAIN VISITOR ELEVATION — HIGH COUNTRY RUNS 10–20°F COLDER
DAYLIGHT ON JULY 15 · LOCAL PARK TIME (MDT)COMPUTED FROM THE PARK'S OWN COORDINATES FOR THE 15TH — THE MIDDLE OF THE MONTH STANDS FOR IT, AS IT DOES FOR CLIMATE NORMALS. WITHIN A MONTH THESE TIMES SHIFT BY UP TO AN HOUR
LEAVE THE TRAILHEAD BY — TO FINISH BEFORE DARK ON JULY 15WALKING TIMES ESTIMATED FROM EACH TRAIL'S MEASURED DISTANCE AND ELEVATION GAIN — A PLANNING FIGURE, NOT A PACE. ADD YOUR OWN MARGIN FOR PHOTOS, REST AND CROWDS. WATER AT THE COOL-WEATHER RATE, BECAUSE THIS MONTH AVERAGES 79°F. TRAILS WE HAVE NOT MEASURED ARE LEFT OUT RATHER THAN GUESSED
WHAT JULY ASKS OF YOU HEREGrand Teton National Park in August — Good, highs around 78°F, crowds: peak crowds (still peak season; warm days, and afternoon thunderstorms build fast over the peaks).
Our verdict for July is "Best window". The editorial pick — weather, access and experience line up. Expect highs around 79°F and lows around 41°F, with crowds at the "peak crowds" level. Temperatures are approximate NOAA normals at the main visitor elevation; crowd levels follow published NPS visitation statistics.
Across the full 12-month review, the best window is July & September, and the peak-crowd months are Jul–Aug. July itself we rate "Best window".
August we rate "Good" against "Best window" for July, with highs around 78°F and crowds at the "peak crowds" level.
About 15h 07m on July 15: the sun rises around 5:55 AM and sets around 9:02 PM local park time (MDT). Computed from the park's own coordinates, so it is the light you actually get at the trailhead, not the nearest city's.
Paintbrush Canyon–Cascade Canyon Loop takes about 8h 50m of walking, so on July 15 you would need to leave the trailhead by about 12:09 PM to finish before dark — the sun sets around 9:02 PM local park time (MDT). Walking times are estimated from each trail's measured distance and elevation gain, so treat them as a planning figure and add your own margin for photos, rest and crowds.
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