Agate Fossil Beds National Monument in December
December at Agate Fossil Beds National Monument averages a daytime high near 38°F and an overnight low around 8°F, with about 0.4" of precipitation. Visitation runs about 0.1× the park's average month, which makes December a very quiet month here.
- Average low
- 8°F
- Average high
- 38°F
Range across the year: 8°F to 87°F
- Precipitation
- 0.4 in
- Daylight
- 8.9 hours
Roughly 1% of the park's yearly visitors come in December: about 130 recreation visits in a typical year, based on National Park Service monthly counts from 1979 to 2025.
That makes December the 10th-busiest of the park's twelve months, sitting between the August peak (2.8×) and the January low (0.1×).
On our Best Time to Visit score December rates 2/100 ("Poor"). Our recommended month is September: the lightest crowds of the park's good-weather months.
The daily average of about 23°F is cold, with winter conditions likely on higher ground. These figures are 1991–2020 NOAA climate normals from the nearest station, about 0.9 miles from the park.
Because June, July and August together draw about 61% of annual visitors, choosing December instead steps outside that summer crush — the single biggest lever on how crowded the park feels.
You'll have about 8.9 hours of daylight in December to explore — near the year-round minimum.
Park-wide, 2025 drew 16,827 recreation visits, down 13.2% from 19,395 in 2024.
How December compares with the months around it
| Month | Avg high / low | Crowds | Best-time score |
|---|---|---|---|
| November | 48°F / 17°F | 0.2× Very quiet | 7 Poor |
| December | 38°F / 8°F | 0.1× Very quiet | 2 Poor |
| January | 38°F / 9°F | 0.1× Very quiet | 2 Poor |
All twelve months at Agate Fossil Beds, with the best time to visit.
Frequently Asked Questions
December averages a daytime high near 38°F and an overnight low around 8°F at Agate Fossil Beds National Monument, with about 0.4 inches of precipitation. These are 1991–2020 NOAA climate normals from the nearest station, about 0.9 miles from the park, so conditions inside the park can differ, especially at other elevations.
December is very quiet at Agate Fossil Beds National Monument (about 0.1× the average month). Our best-time score rates it "Poor" at 2/100. Our recommended month is September. December draws about 9% of the visits Agate Fossil Beds sees in an average month. Numbers that low usually mean limited access: closed roads, closed facilities or deep-winter conditions. The count alone does not say which, so check the park's current conditions before planning around December.
The busiest month is August and the quietest is January. December sits at about 0.1× the park's average, or 1% of annual visitation.
A typical December sees about 0,000 recreation visits at Agate Fossil Beds National Monument, based on National Park Service monthly counts from 1979–2025.
Where to stay near Agate Fossil Beds in December
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See the full ranking of the best national parks to visit in December.
Source: National Park Service Visitor Use Statistics (1979–2025), NOAA NCEI Climate Normals 1991–2020. Updated 2026-10-11.