Updated October 2026
Dinosaur National Monument Weather by Month
Dinosaur National Monument is warmest in July, when the nearest NOAA climate station averages a high of 91°F and a low of 61°F, and coldest in January, with an average high of 31°F and an average low of 14°F. September and October are the wettest months, with about 1.3 inches of precipitation each.
These figures are NOAA's 1991–2020 climate normals, the 30-year average for each calendar month, from the nearest long-record weather station, 18.2 miles from the park's reference point. A single station cannot describe a whole park: temperatures elsewhere in Dinosaur National Monument can differ from these, particularly with elevation.
Warmest month
Jul
91°F avg high
Coldest month
Jan
14°F avg low
Longest days
Jun
14.9 h of daylight
Average weather at Dinosaur by month
| Month | Avg high | Avg low | Precipitation | Daylight |
|---|---|---|---|---|
| January | 31°F | 14°F | 0.8 in | 9.4 h |
| February | 37°F | 20°F | 0.8 in | 10.4 h |
| March | 50°F | 29°F | 0.9 in | 11.7 h |
| April | 60°F | 35°F | 1.1 in | 13.1 h |
| May | 71°F | 44°F | 1.2 in | 14.3 h |
| June | 83°F | 54°F | 0.8 in | 14.9 h |
| July | 91°F | 61°F | 0.7 in | 14.6 h |
| August | 88°F | 59°F | 0.9 in | 13.6 h |
| September | 77°F | 50°F | 1.3 in | 12.3 h |
| October | 61°F | 39°F | 1.3 in | 10.9 h |
| November | 45°F | 27°F | 0.8 in | 9.7 h |
| December | 32°F | 16°F | 0.8 in | 9.1 h |
| Year total | 11.4 in |
NOAA 1991–2020 climate normals from station USW00094082, 18.2 miles from the park's reference point. Daylight is the monthly average, computed from the park's latitude. Each month links to how crowded Dinosaur is at that time of year.
Dinosaur weather by season
Winter: December to February
Average highs bottom out at 31°F in January, between 32°F in December and 37°F in February, with average lows between 14°F and 20°F. The average low is at or below freezing in all three months. Together the three months average 2.4 inches of precipitation, about 21% of the yearly total. Daylight is at its shortest, about 9.1 hours in December.
Spring: March to May
Average highs climb from 50°F in March to 71°F in May, with average lows between 29°F and 44°F. The average low is at or below freezing in March. Together the three months average 3.2 inches of precipitation, about 28% of the yearly total. Daylight lengthens from about 11.7 hours in March to 14.3 in May.
Summer: June to August
Average highs peak at 91°F in July, between 83°F in June and 88°F in August, with average lows between 54°F and 61°F. The average high is 90°F or hotter in July. Together the three months average 2.4 inches of precipitation, about 21% of the yearly total. Daylight is at its longest, about 14.9 hours in June.
Fall: September to November
Average highs fall from 77°F in September to 45°F in November, with average lows between 27°F and 50°F. The average low is at or below freezing in November. Together the three months average 3.4 inches of precipitation, about 30% of the yearly total and more than in any other season. Daylight shortens from about 12.3 hours in September to 9.7 in November.
What the National Park Service says about the weather
Dinosaur's climate is semiarid with temperatures averaging between 0°F to 30°F in January and 50°F to 100°F in July. Extreme winter low temperatures may reach -40°F and summer highs can top 110°F. Elevations within the park vary between 4,700 and 9,000 feet. Winter snow may be heavy at higher elevations while only light to moderate snow is found at lower elevations. Summer thunderstorms may cause heavy downpours and localized flooding, but fail to dampen parched soils less than a mile away.
Weather description courtesy of the National Park Service — official park site.
Today's forecast for Dinosaur
Averages describe a typical month, not this week. For current conditions and the seven-day outlook, the National Weather Service issues a forecast for the park's reference point at 40.51°N, 108.93°W. It covers that one spot, so other elevations in the park can differ from it, as they do from the averages above.
National Weather Service forecast for Dinosaur National Monument →
Weather and crowds together
July is both the warmest month and the busiest, with about 2.5× the visitors of the park's average month. February is the quietest. To see those crowds set against the weather for all twelve months, read the best time to visit Dinosaur National Monument. For hotels, cabins and rentals close to the park, see where to stay near Dinosaur.
Where to stay near Dinosaur
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Top-rated places to stay near Dinosaur
Prices for Oct 16–18, 4 adults. Change dates on the map below.
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Frequently Asked Questions
July is the warmest month at Dinosaur National Monument, with an average high of 91°F and an average low of 61°F. That is the 1991–2020 average at the nearest long-record NOAA station, 18.2 miles from the park's reference point. Temperatures inside the park can differ, particularly with elevation.
January is the coldest month at Dinosaur National Monument, with an average low of 14°F and an average high of 31°F, based on NOAA 1991–2020 climate normals.
September and October are the wettest months, with about 1.3 inches of precipitation each. July is the driest, at about 0.7 inches. The station records about 11.4 inches of precipitation in an average year.
Daylight at Dinosaur National Monument runs from about 9.1 hours a day in December to about 14.9 hours in June, computed from the park's latitude.
Weather at nearby parks
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Keep exploring
Sources: NOAA NCEI U.S. Climate Normals 1991–2020 (station USW00094082), daylight computed from latitude, weather description from the National Park Service, crowd levels from National Park Service Visitor Use Statistics (1979–2025). Updated 2026-10-11. Lodging results are provided by Stay22; WhenToVisitParks may earn a commission from bookings, at no extra cost to you.