Gateway Arch National Park in December
In December, Gateway Arch National Park averages a high of 44°F and a low of 29°F, with 2.3 inches of precipitation (rain plus melted snow). About 114,000 people visit, the 10th busiest of 12 (quiet). Days are 9 hours 29 minutes long.
- Quiet
- Moderate
- Busy
- Very busy
- Few or no visits (may be closed)
- Best months
- High / low
- 44° / 29°F
- Precipitation
- 2.3in
- Snow
- –in
- Daylight
- 9h 29m
- Visitors
- 114,000
- Crowds
- Quiet
Best months for weather and crowds instead: March (moderate), October (quiet) and November (quiet).
Weather 1991–2020 averages at Cahokia St Louis AP, IL, 3.7 miles from the park's center, 413 ft. Visitors National Park Service recreation visits, average of 2023–2025. Updated .
Other parks in December
| Park | High / low °F | Crowds | Weather |
|---|---|---|---|
| Ozark National Scenic Riverways | 47° / 24° | Quiet | Cool |
| Mammoth Cave National Park | 51° / 33° | Moderate | Cool |
| Buffalo National River | 46° / 28° | Quiet | Cool |
| Indiana Dunes National Park | 37° / 24° | Quiet | Cold |
| Hot Springs National Park | 53° / 35° | Moderate | Cool |
Closures, reservations and alerts: Gateway Arch National Park on nps.gov
All twelve months at Gateway Arch · National parks to visit in December