San Antonio Missions National Historical Park in September
September at San Antonio Missions National Historical Park averages a daytime high near 91°F and an overnight low around 71°F, with about 3.2" of precipitation. Visitation runs about 1.1× the park's average month, which makes September an average month here.
- Average low
- 71°F
- Average high
- 91°F
Range across the year: 42°F to 98°F
- Precipitation
- 3.2 in
- Daylight
- 12.2 hours
Roughly 9% of the park's yearly visitors come in September: about 119,000 recreation visits in a typical year, based on National Park Service monthly counts from 1983 to 2025.
That makes September the 5th-busiest of the park's twelve months, sitting between the July peak (1.2×) and the November low (0.8×).
On our Best Time to Visit score September rates 29/100 ("Poor"). Our recommended month is February: pleasant weather with noticeably thinner crowds (shoulder season).
The daily average of about 81°F is hot, with afternoons near 91°F to plan the day around. These figures are 1991–2020 NOAA climate normals from the nearest station, about 3.2 miles from the park.
Because June, July and August together draw about 28% of annual visitors, choosing September instead steps outside that summer crush — the single biggest lever on how crowded the park feels.
You'll have about 12.2 hours of daylight in September to explore — between the 10.1-hour midwinter low and the 13.9-hour summer high.
Park-wide, 2025 drew 1,552,510 recreation visits, up 21.4% from 1,278,777 in 2024.
How September compares with the months around it
| Month | Avg high / low | Crowds | Best-time score |
|---|---|---|---|
| August | 98°F / 76°F | 1.0× Average | 28 Poor |
| September | 91°F / 71°F | 1.1× Average | 29 Poor |
| October | 84°F / 62°F | 1.0× Average | 62 Good |
All twelve months at San Antonio Missions, with the best time to visit.
Things to do at San Antonio Missions in September
The National Park Service tags 3 San Antonio Missions activities for fall. Each links to the park's own page for it.
- Explore the Missions of San Antonio · 0-4 hours
- Hike & Bike Along the River · 15-240 minutes
- Junior Ranger Program · 15-60 minutes
Frequently Asked Questions
September averages a daytime high near 91°F and an overnight low around 71°F at San Antonio Missions National Historical Park, with about 3.2 inches of precipitation. These are 1991–2020 NOAA climate normals from the nearest station, about 3.2 miles from the park, so conditions inside the park can differ, especially at other elevations.
September is average at San Antonio Missions National Historical Park (about 1.1× the average month). Our best-time score rates it "Poor" at 29/100. Our recommended month is February.
The busiest month is July and the quietest is November. September sits at about 1.1× the park's average, or 9% of annual visitation.
A typical September sees about 119,000 recreation visits at San Antonio Missions National Historical Park, based on National Park Service monthly counts from 1983–2025.
Where to stay near San Antonio Missions in September
Booking a September trip to San Antonio Missions National Historical Park? Compare hotels, cabins and vacation rentals near the park with live September availability and prices.
Top-rated places to stay near San Antonio Missions
Prices for Oct 30–Nov 1, 4 adults. Change dates on the map below.
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See the full ranking of the best national parks to visit in September.
Source: National Park Service Visitor Use Statistics (1983–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-10-11.