July in Arches National Park is a tough month: highs around 100°F, lows around 67°F. Crowds: busy — #5 busiest of the park's 12 months. It is the park's warmest month of the year. Highs often exceed 100°F; monsoon cells bring flash floods. The editorial best window here is April–May & September–October. You get about 14h 36m of daylight. To finish Devils Garden Trail (full loop) (2h 45m) before dark, leave the trailhead by about 5:55 PM.
Month data reviewed · how we check this
| Verdict | Tough Closures, harsh weather or very limited access — plan carefully. |
|---|---|
| Temps °F | 100° high / 67° low — the park's warmest month |
| Crowds | busy · #5 busiest of the park's 12 months |
| What July is like | Highs often exceed 100°F; monsoon cells bring flash floods |
| Best window (whole year) | April–May & September–October |
| Peak crowds (whole year) | Apr–May, Sep–Oct |
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 HOT-WEATHER RATE, BECAUSE THIS MONTH AVERAGES 100°F. TRAILS WE HAVE NOT MEASURED ARE LEFT OUT RATHER THAN GUESSED
WHAT JULY ASKS OF YOU HEREArches National Park in August — Tough, highs around 97°F, crowds: busy (monsoon peak — violent storms, flash floods, roads close after rain).
Our verdict for July is "Tough". Closures, harsh weather or very limited access — plan carefully. Expect highs around 100°F and lows around 67°F, with crowds at the "busy" 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 April–May & September–October, and the peak-crowd months are Apr–May, Sep–Oct. July itself we rate "Tough".
About 14h 36m on July 15: the sun rises around 6:06 AM and sets around 8:42 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.
Devils Garden Trail (full loop) takes about 2h 45m of walking, so on July 15 you would need to leave the trailhead by about 5:55 PM to finish before dark — the sun sets around 8:42 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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