Updated October 2026
Devils Tower National Monument Weather by Month
Devils Tower National Monument is warmest in July, when the nearest NOAA climate station averages a high of 85°F and a low of 55°F, and coldest in January, with an average high of 34°F and an average low of 8°F. June is the wettest month, with about 3.2 inches of precipitation. Snowfall is heaviest in December, at about 9.6 inches.
These figures are NOAA's 1991–2020 climate normals, the 30-year average for each calendar month, from the nearest long-record weather station, 0.5 miles from the park's reference point. A single station cannot describe a whole park: temperatures elsewhere in Devils Tower National Monument can differ from these, particularly with elevation.
Warmest month
Jul
85°F avg high
Coldest month
Jan
8°F avg low
Wettest month
Jun
3.2 in avg
Snowiest month
Dec
9.6 in avg
Longest days
Jun
15.4 h of daylight
Average weather at Devils Tower by month
| Month | Avg high | Avg low | Precipitation | Snowfall | Daylight |
|---|---|---|---|---|---|
| January | 34°F | 8°F | 0.7 in | 8.8 in | 9.0 h |
| February | 37°F | 11°F | 0.8 in | 9.3 in | 10.2 h |
| March | 47°F | 21°F | 1.1 in | 7.3 in | 11.6 h |
| April | 57°F | 29°F | 2.0 in | 5.3 in | 13.3 h |
| May | 66°F | 39°F | 2.9 in | 0.4 in | 14.6 h |
| June | 76°F | 49°F | 3.2 in | 0.0 in | 15.4 h |
| July | 85°F | 55°F | 2.1 in | 0.0 in | 15.0 h |
| August | 85°F | 52°F | 1.9 in | 0.0 in | 13.9 h |
| September | 75°F | 42°F | 1.3 in | 0.0 in | 12.3 h |
| October | 60°F | 30°F | 1.5 in | 1.8 in | 10.7 h |
| November | 45°F | 19°F | 0.8 in | 6.3 in | 9.3 h |
| December | 35°F | 9°F | 0.7 in | 9.6 in | 8.6 h |
| Year total | 19.0 in | 48.8 in |
NOAA 1991–2020 climate normals from station USC00482466, 0.5 miles from the park's reference point. Daylight is the monthly average, computed from the park's latitude. Each month links to how crowded Devils Tower is at that time of year.
Devils Tower weather by season
Winter: December to February
Average highs bottom out at 34°F in January, between 35°F in December and 37°F in February, with average lows between 8°F and 11°F. The average low is at or below freezing in all three months. Together the three months average 2.2 inches of precipitation, about 12% of the yearly total and less than in any other season. Snowfall averages about 28 inches for the season. Daylight is at its shortest, about 8.6 hours in December.
Spring: March to May
Average highs climb from 47°F in March to 66°F in May, with average lows between 21°F and 39°F. The average low is at or below freezing in March and April. Together the three months average 6 inches of precipitation, about 32% of the yearly total. Snowfall averages about 13 inches for the season. Daylight lengthens from about 11.6 hours in March to 14.6 in May.
Summer: June to August
Average highs climb from 76°F in June to 85°F in August, with average lows between 49°F and 55°F. Together the three months average 7.2 inches of precipitation, about 38% of the yearly total and more than in any other season. Daylight is at its longest, about 15.4 hours in June.
Fall: September to November
Average highs fall from 75°F in September to 45°F in November, with average lows between 19°F and 42°F. The average low is at or below freezing in October and November. Together the three months average 3.6 inches of precipitation, about 19% of the yearly total. Snowfall averages about 8.1 inches for the season, most of it in November. Daylight shortens from about 12.3 hours in September to 9.3 in November.
What the National Park Service says about the weather
Obtain forecast information before beginning your adventure at Devils Tower National Monument and observe changing weather conditions. Thunderstorms can develop quickly bringing lightning, hail, rain, slippery rock surfaces, and hypothermia. Summer days can bring very hot temperatures. Carry enough water, and realize the rock of the Tower can reach over 100 degrees Fahrenheit. Winter weather can bring blowing snow and road closures. Check local forecasts and road conditions before visiting.
Weather description courtesy of the National Park Service — official park site.
Today's forecast for Devils Tower
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 44.59°N, 104.72°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 Devils Tower National Monument →
Weather and crowds together
July is both the warmest month and the busiest, with about 2.9× the visitors of the park's average month. January is the quietest. To see those crowds set against the weather for all twelve months, read the best time to visit Devils Tower National Monument. For hotels, cabins and rentals close to the park, see where to stay near Devils Tower.
Where to stay near Devils Tower
Picked a month for Devils Tower National Monument? Compare hotels, cabins and vacation rentals near the park with live availability and prices.
Top-rated places to stay near Devils Tower
Prices for Oct 16–18, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a trip to Devils Tower?
Get crowd forecasts and lodging deals for Devils Tower by email. No spam, unsubscribe anytime.
Frequently Asked Questions
July is the warmest month at Devils Tower National Monument, with an average high of 85°F and an average low of 55°F. That is the 1991–2020 average at the nearest long-record NOAA station, 0.5 miles from the park's reference point. Temperatures inside the park can differ, particularly with elevation.
January is the coldest month at Devils Tower National Monument, with an average low of 8°F and an average high of 34°F, based on NOAA 1991–2020 climate normals.
June is the wettest month, with about 3.2 inches of precipitation. January and December are the driest, at about 0.7 inches each. The station records about 19 inches of precipitation in an average year.
Yes. The nearest long-record NOAA station, 0.5 miles from the park's reference point, averages about 49 inches of snow a year. December is the snowiest month, at about 9.6 inches. The station averages at least a tenth of an inch of snow in 8 of the 12 months.
Weather at nearby parks
74 mi away · warmest in July (85°F)
79 mi away · warmest in July (79°F)
94 mi away · warmest in July (85°F)
127 mi away · warmest in July (88°F)
141 mi away · warmest in July (88°F)
148 mi away · warmest in July (91°F)
Keep exploring
Sources: NOAA NCEI U.S. Climate Normals 1991–2020 (station USC00482466), 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.