October in Arches National Park is a best window month: highs around 74°F, lows around 42°F. Crowds: peak crowds — #1 busiest of the park's 12 months. Warm days, cold nights, the last busy month of the year. The editorial best window here is April–May & September–October. You get about 11h 12m of daylight. To finish Devils Garden Trail (full loop) (2h 45m) before dark, leave the trailhead by about 3:52 PM.
Month data reviewed · how we check this
| Verdict | Best window The editorial pick — weather, access and experience line up. |
|---|---|
| Temps °F | 74° high / 42° low |
| Crowds | peak crowds · #1 busiest of the park's 12 months |
| What October is like | Warm days, cold nights, the last busy month of the year |
| 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 OCTOBER 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 OCTOBER 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 74°F. TRAILS WE HAVE NOT MEASURED ARE LEFT OUT RATHER THAN GUESSED
WHAT OCTOBER ASKS OF YOU HEREArches National Park in November — Shoulder, highs around 56°F, crowds: quiet (crowds fall away and the light runs long — the connoisseur's month).
Our verdict for October is "Best window". The editorial pick — weather, access and experience line up. Expect highs around 74°F and lows around 42°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 April–May & September–October, and the peak-crowd months are Apr–May, Sep–Oct. October itself we rate "Best window".
November we rate "Shoulder" against "Best window" for October, with highs around 56°F and crowds at the "quiet" level.
About 11h 12m on October 15: the sun rises around 7:27 AM and sets around 6:39 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 October 15 you would need to leave the trailhead by about 3:52 PM to finish before dark — the sun sets around 6:39 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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