July in Big Bend National Park is a tough month: highs around 95°F, lows around 72°F. Crowds: quiet — #8 busiest of the park's 12 months. Monsoon rains begin — Santa Elena can flood and close. The editorial best window here is February & April & October–November. You get about 13h 50m of daylight. To finish South Rim Trail (5h) before dark, leave the trailhead by about 3:52 PM.
Month data reviewed · how we check this
| Verdict | Tough Closures, harsh weather or very limited access — plan carefully. |
|---|---|
| Temps °F | 95° high / 72° low |
| Crowds | quiet · #8 busiest of the park's 12 months |
| What July is like | Monsoon rains begin — Santa Elena can flood and close |
| Best window (whole year) | February & April & October–November |
| Peak crowds (whole year) | Feb–Mar |
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 (CDT)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 95°F. TRAILS WE HAVE NOT MEASURED ARE LEFT OUT RATHER THAN GUESSED
WHAT JULY ASKS OF YOU HEREBig Bend National Park in August — Tough, highs around 94°F, crowds: quiet (wettest month in the chisos; flash floods in the arroyos).
Our verdict for July is "Tough". Closures, harsh weather or very limited access — plan carefully. Expect highs around 95°F and lows around 72°F, with crowds at the "quiet" 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 February & April & October–November, and the peak-crowd months are Feb–Mar. July itself we rate "Tough".
About 13h 50m on July 15: the sun rises around 7:03 AM and sets around 8:53 PM local park time (CDT). Computed from the park's own coordinates, so it is the light you actually get at the trailhead, not the nearest city's.
South Rim Trail takes about 5h of walking, so on July 15 you would need to leave the trailhead by about 3:52 PM to finish before dark — the sun sets around 8:53 PM local park time (CDT). 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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