Guadalupe Mountains in September: Crowds, Weather & What to Pack
Best window · VisitWhen score 81/100 · #1 of 12 months
September is one of the best months of the year to visit Guadalupe Mountains National Park: crowds run 35% of the March peak (12,166 average visits). Weather: highs average 80°F and lows 58°F, with 2.3″ of precipitation and 12.4 hours of daylight. Computed from NPS and NOAA data.
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Crowds in September
Guadalupe Mountains averages 12,166 recreation visits in September — 35% of what March, the peak month, draws — the third-quietest month of the year. Trailheads and parking fill accordingly.
Weather & daylight
Days run warm (highs average 80°F), and nights stay mild (lows average 58°F). Average precipitation is 2.3″ for the month. Mid-month daylight runs 12.4 hours.
NOAA 1991–2020 monthly normals, station PINE SPRINGS, TX US (4 mi from park coordinates, 5,591 ft elevation) — conditions vary inside the park, especially with elevation. Daylight computed for the 15th of September.
What to pack for Guadalupe Mountains in September
Computed from the month's weather normals above — not a generic list.
- Packable rain jacket — 2.3″ of precipitation is normal this month
- Sturdy broken-in footwear, navigation and a basic first-aid kit — every park, every month
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Also at their best in September
Other parks whose computed September verdict is a best window — same NPS × NOAA formula:
- Wrangell–St. Elias in September — 25% of peak crowds, highs 56°F, score 84/100
- Gateway Arch in September — 29% of peak crowds, highs 81°F, score 80/100
- Isle Royale in September — 39% of peak crowds, highs 65°F, score 79/100
- Crater Lake in September — 49% of peak crowds, highs 63°F, score 77/100
Common questions
Is Guadalupe Mountains crowded in September?
No — September is one of the quieter months: 35% of the March peak, averaging 12,166 visits (NPS, 2021–2025).
What is the weather like in Guadalupe Mountains in September?
Average highs of 80°F, lows of 58°F, 2.3″ of precipitation (NOAA 1991–2020 normals, PINE SPRINGS, TX US station).
What should I pack for Guadalupe Mountains in September?
Packable rain jacket; Sturdy broken-in footwear, navigation and a basic first-aid kit — the full weather-computed list is on this page.
See also: the best national parks to visit in September · Last verified 2026-09-24