Climate and monthly weather forecast
Devils Tower, WY

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The climate of Devils Tower

Nestled in the state of Wyoming, USA, Devils Tower experiences a Mid-latitude steppe climate, classified as BSk according to Köppen climate categorization. Falling within this category indicates semi-arid conditions, signifying low rainfall, sunny skies, and clear nights, which is strongly reflected in the climatic patterns observed through the year.

Temperatures range notably throughout the year for Devils Tower, from harshly cold days with lows of 16.2°F (-8.8°C) in February to warmer summer months where the thermometer may rise to 83.8°F (28.8°C) in July. As expected, temperature lows are typically observed in the winter, while highs coincide with the summer period. A shift in relative humidity levels from 79% in January to about 49% from August to September often accompanies these temperature changes, adding another layer of climatic diversity to this region.

Rainfall trends in Devils Tower are not uniform across the year. Precipitation peaks in May with 2.32" (59mm) and plateaus in summer before gradually receding to 0.71" (18mm) in December. The number of rainfall days also witnesses a steep spike from 2.9 days in February to 15.6 days in May, with a notable decline during the tail end of the year.

Distinct patterns are also noticeable in snowfall data, which reflects the influence of the season. While snowfall reaches a maximum of 7.36" (187mm) in April, it virtually vanishes from June to August. The snowfall days also maximize in winter and almost disappear in summer.

The best time to visit Devils Tower

July and August, the warmest months with temperature highs of 83.8°F (28.8°C) and 81.9°F (27.7°C), respectively, are often considered the best times to plan a visit to Devils Tower. The relative humidity drops significantly during these months reaching 51% in July and 49% in August, offering relatively dry weather conditions. Additionally, sunlight exposure is at peak, with daylight hours reaching a fantastic length of 15.2 hours and 14 hours respectively, and about an impressive 11.6 hours and 11.7 hours of sunshine during these months.

The worst time to visit Devils Tower

Given the harsh weather conditions, January and February are generally advised against for travel plans. The temperature typically drops to lows of 18.5°F (-7.5°C) and 16.2°F (-8.8°C) during these months. Combined with the peak relative humidity of around 79% and 78%, respectively, the weather can feel significantly more bitter. Also, these months receive the shortest daylight hours, with only about 9.3 and 10.5 hours of daylight.

Spring weather in Devils Tower

Spring at Devils Tower features a noticeable transition in climatic conditions. March starts off with 44.1°F (6.7°C) temperature high and 27.5°F (-2.5°C) lows but becomes warmer in the season with May experiencing a high of 61.9°F (16.6°C) and low of 43.2°F (6.2°C). Rain becomes more frequent with spring, escalating from 1.18" (30mm) in March to 2.32" (59mm) in May. The average daylight hours also increase from 12 hours to 14.8 hours, offering more opportunities for outdoor activities.

Summer weather in Devils Tower

During the summer months, Devils Tower experiences the warmest weather. Temperatures move around a comfortable spectrum with highs from 74.8°F (23.8°C) in June scaling to 83.8°F (28.8°C) in July and then slightly dropping to 81.9°F (27.7°C) in August, allowing for pleasant outdoor activities. There is a decrease in rainfall, from 1.81" (46mm) in June to 1.54" (39mm) in August, and humidity levels are lower, further enhancing the appeal of this period.

Autumn weather in Devils Tower

Autumn witnesses a gradual decline in temperature, from a high of 72.9°F (22.7°C) in September to a considerably cooler 43.5°F (6.4°C) in November. The rainfall undergoes a gradual fluctuation with an increase from 0.91" (23mm) in September to peak at 1.46 inch in October, then falls to 0.75 inch in November. Autumn also announces the advent of the snow season with 0.43" (11mm) of snowfall observed in September growing to 4.13" (105mm) in November.

Winter weather in Devils Tower

Devils Tower experiences quite cold and windy winters. December sees the mercury drop to a low of 18.5°F (-7.5°C), and daily highs register a chilly 30.9°F (-0.6°C). As winter progresses, the temperature falls even lower, with January witnessing 18.5°F (-7.5°C) low and 31.5°F (-0.3°C) high, while February gets colder still with 16.2°F (-8.8°C) as low and 31.1°F (-0.5°C) as the high. With snowfall in the range from 4.09" (104mm) in December to 5.04" (128mm) in February, winter transforms Devils Tower into a cold wintry wonderland.

Weather in January

January, nestled in the heart of winter in Devils Tower, Wyoming, USA, brings about icy temperatures and a flurry of snowfall. Following December, there's a slight increase in temperature, but still, the cold embraces the city in sub-freezing temperatures. Weather in January »

Weather in February

As Devils Tower transitions from January to February, cold weather and snowy landscapes continue to dominate the scene. Despite the increase in snowfall to 5.04" (128mm), the month offers a slight uptick in daylight hours, breathing a bit of warmth onto the frost-laden city. Weather in February »

Weather in March

March exhibits a noticeable transition in weather conditions in Devils Tower as winter ebbs away to give rise to spring. As compared to February, there's a significant decrease in snowfall, down to 5.24" (133mm), signaling the retreating cold. Weather in March »

Weather in April

April marks the onset of consistent spring weather in Devils Tower. Shifting from wintry March, changes in weather parameters become conspicuous, thus stepping away from cold winds and snow showers of the previous months. Aggravating rainfall numbers, peaking at 2.01" (51mm), denote an increase in rain showers, replacing the former winter snowfall. Weather in April »

Weather in May

May in Devils Tower presents a pleasant change as spring proceeds towards summer. Seasonal transition from the rainy April to warmer weather becomes more prominent, with an increase in maximum temperatures and consistent showers. The climb of rainfall to 2.32" (59mm) fuels the thriving flora, painting the county in vibrant hues of green. Weather in May »

Weather in June

June introduces the early signs of summer in Devils Tower, Wyoming, USA, as milder spring weather fades away. Following May, noted changes in weather conditions sweep the county, keeping the rain showers steady and increasing temperatures. Weather in June »

Weather in July

July stands as the warmest month in Devils Tower, portraying a typical summer month with extended daylight and high temperatures. This summer peak, seen after June, creates the perfect setting for outdoor explorations and activities. Weather in July »

Weather in August

Despite retaining July's high temperatures, August in Devils Tower begins to hint at the approaching end of summer. A slight dip in temperature sets a gradual transition towards the cooler months of the year. Even though the county encounters a marginal decrease in rainfall, down to 1.54" (39mm), the weather stays pleasant for outdoor activities. Weather in August »

Weather in September

As summer retreats, September in Devils Tower dawns with the onset of mild autumn. Following the more heated August, a noticeable descent in temperatures paints a picture of colder nights and fresher days. A steep drop in rainfall levels to 0.91" (23mm) marks the driest month of the year, keeping the skies predominantly clear and blue. Weather in September »

Weather in October

October invites the full throttle of autumn season in Devils Tower, Wyoming, USA, with a significant decrease in temperature following September. The shift from milder autumn to the pre-winter chill sets the occasional cold wind lifting colorful leaves off trees. Weather in October »

Weather in November

The last month of the autumn, November, is chilly month in Devils Tower, Wyoming, with an average temperature ranging between min 28.2°F (-2.1°C) and max 43.5°F (6.4°C). The arrival of November signals a shift in temperature, down from a fresh 54.5°F (12.5°C) in October to a frosty 43.5°F (6.4°C). Weather in November »

Weather in December

December brings in the wintry charm to Devils Tower, as snow falls and temperatures plunge steadily. Continuation from November's dipping temperatures opens up a snowy panorama, with a further increase in snowfall up to 4.09" (104mm). Weather in December »
Updated: Aug 25, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the most humid month?

January is the most humid month, with an average relative humidity of 79%.

What is the driest month?

January is the month with the least rainfall. Rain falls for 3 days and accumulates 0.59" (15mm) of precipitation.

How much does it rain in Devils Tower?

Throughout the year, in Devils Tower, there are 99.6 rainfall days, and 15.71" (399mm) of precipitation is accumulated.

When does it snow?

Months with snowfall are January through May, September through December.

How many days does it snow?

In Devils Tower, during the entire year, snow falls for 57 days and aggregates up to 36.46" (926mm) of snow.

When is the lowest UV index?

The months with the lowest UV index are January, February, April, November and December, with an average maximum UV index of 2.

What are the months with the least sunshine?

February and December, with an average of 5.7h of sunshine, are months with the least sunshine.

When is Daylight Saving Time (DST)?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from MST to MDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from MDT to MST.

When does it snow the most?

April is the month with the most snowfall in Devils Tower. Snow falls for 6 days and accumulates 7.36" (187mm) of snow.

What is the rainiest month?

May is the month with the most rainfall. Rain falls for 15.6 days and accumulates 2.32" (59mm) of precipitation.

When it does not snow?

In Devils Tower, snow does not fall in June through August.

When are the longest days?

The month with the longest days is June, with an average of 15h and 30min of daylight.

What are the warmest months?

July, characterized by an average high temperature of 83.8°F (28.8°C) and a low temperature of 61°F (16.1°C), is generally the warmest month.

What is the month with the highest UV index in Devils Tower?

July is the month with the highest UV index in Devils Tower, with an average maximum UV index of 6.

What are the least humid months?

August and September, with an average relative humidity of 49%, are the least humid months.

What month has the most sunshine?

With an average of 11.7h of sunshine, August has the most sunshine of the year in Devils Tower.

What month is the coldest?

In Devils Tower, December is the coldest month, with temperatures averaging a high of 30.9°F (-0.6°C) and a low of 18.5°F (-7.5°C).

What is the month with the shortest days?

The month with the shortest days is December, with an average of 8h and 54min of daylight.

Average temperature
Devils Tower, WY

Average temperature - Devils Tower, WY

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is December (30.9°F).

The month with the highest average low temperature is July (61°F).
The coldest month (with the lowest average low temperature) is February (16.2°F).

Average pressure
Devils Tower, WY

Average pressure - Devils Tower, WY

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).

Average wind speed
Devils Tower, WY

Average wind speed - Devils Tower, WY

The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest month (with the lowest average wind speed) is August (8mph).

Average humidity
Devils Tower, WY

Average humidity - Devils Tower, WY

The month with the highest relative humidity is January (79%).
The months with the lowest relative humidity are August and September (49%).

Average rainfall
Devils Tower, WY

Average rainfall - Devils Tower, WY

The wettest month (with the highest rainfall) is May (2.32").
The driest month (with the least rainfall) is January (0.59").

Average rainfall days
Devils Tower, WY

Average rainfall days - Devils Tower, WY

The month with the highest number of rainy days is May (15.6 days).
The month with the least rainy days is February (2.9 days).

Average snowfall
Devils Tower, WY

Average snowfall - Devils Tower, WY

The month with the highest snowfall is April (7.36").
The months with the least snowfall are June, July and August (0").

Average snowfall days
Devils Tower, WY

Average snowfall days - Devils Tower, WY

The month with the highest number of snowfall days is February (11.2 days).
The months with the least snowfall days are June, July and August (0 days).

Average daylight / Average sunshine
Devils Tower, WY

Average daylight / Average sunshine - Devils Tower, WY

The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).

The month with the most sunshine is August (Average sunshine: 11h and 42min).
The months with the least sunshine are February and December (Average sunshine: 5h and 42min).

Average sunshine days
Devils Tower, WY

Average sunshine days - Devils Tower, WY

The months with the most sunshine days are September and November (20.3 days).
The month with the least sunshine days is May (12.7 days).

Average UV index
Devils Tower, WY

Average UV index - Devils Tower, WY

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, April, November and December (UV index 2).

Average visibility
Devils Tower, WY

Average visibility - Devils Tower, WY

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

Devils Tower, Wyoming, USA

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