Climate and monthly weather forecast
Vernal, UT

Great scenery of the rocky and sandy Arch in Vernal, Utah
Great scenery of the rocky and sandy Arch in Vernal, Utah

The climate of Vernal

Situated in Utah, USA, Vernal experiences a Mid-latitude Steppe climate as per the Köppen climate classification, labeled as BSk. The climatological data identifies significant seasonal fluctuations that characterize Vernal's weather and climate. These transitions occur throughout the 12 calendar months, impacting temperature, humidity, rainfall, snowfall, daylight, sunshine, and winds.

Vernal witnesses a considerable range of temperature with the highest average temperature recorded at 85.6°F (29.8°C) in July, and the coldest average lower limit hitting 12.7°F (-10.7°C) in January. An equally wide range can be seen in relative humidity, soaring at 81% in January and dropping markedly to 30% in June. The rainfall pattern is uniform, averaging around half an inch each month. Snowfall is mainly concentrated in winter months, reaching its zenith of 4.29" (109mm) in December. The daylight and sunshine durations naturally fluctuate, peaking in Summer months and descending during Winter. Wind rates oscillate moderately, with maximum gust speeds of 10.3mph (16.6km/h) appearing in May and June.

Vernal's distinct climatic features include a period devoid of snowfall from June to September implying summer's dominance. The driest month, represented by July, contrasts with December, which sees the maximum level of precipitation. July also takes the throne in terms of sunshine duration and UV index, with values reaching 12 hours and 6, respectively.

The best time to visit Vernal

The optimal time for travel to Vernal is the transition phase from May to early July based on the combination of weather factors. During this timeframe, the temperature comfortably reaches between 55.2°F (12.9°C) and 79.5°F (26.4°C). The accompanying sunshine duration extends from 11 hours up to 12 hours, offering extended daylight for outdoor activities. Relative humidity is at the yearly minimum, resulting in dry and comfortable weather. Rainfall is moderate and infrequent, minimizing the probability of weather-related disruptions. Furthermore, the wind and UV index during this period remain in moderate ranges, contributing to the pleasantness of the season.

The worst time to visit Vernal

The least favorable period for visitation extends from late November through to February. It’s in these months that the temperature plunges to its lowest at 12.7°F (-10.7°C) in January whilst daylight duration is shrunk to approximately 9 hours. Snowfall is notable in this period with December displaying the highest snowfall of 4.29" (109mm). The relatively high humidity of 74% to 81% further escalates the overall cold experience. The intense cold could pose travel concerns and limit outdoor activities.

Spring weather in Vernal

Spring in Vernal, from March to May, starts cold and gradually warms up. The temperature ascends from 33.1°F (0.6°C) in March to 55.2°F (12.9°C) by May. Rainfall is moderate with rainfall days peaking at 10.8 in April. Relative humidity decreases over Spring, starting at 79% in March and ending at 39% in May. With up to 14.4 hours of daylight and 11.6 hours of sunshine in May, Spring introduces longer and sunnier days.

Summer weather in Vernal

Summers in Vernal, spanning June to August, are characterized as warm and relatively dry. July records the highest temperatures, with the average ascending to 85.6°F (29.8°C). Yearly minimum relative humidity levels occur during this season, dropping to a low 30% in June. Although rainfall is around 0.35 to 0.47" (12mm), fewer rainfall days are reported in this period. A day in Summer is bright and long, with sunshine duration reaching up to 12 hours, and daylight extending to a maximum of 15 hours.

Autumn weather in Vernal

Autumn, from September to November, witnesses the decline of temperatures from 74.8°F (23.8°C) to 44.2°F (6.8°C). The relative humidity begins to rise again, reaching 57% by November. Rainfall is slightly higher than in Summer, with rainfall days increasing to a peak of 6.4 days in September. Autumn experiences a gradual shortening of daylight hours, with November only receiving 9.9 daylight hours, and sunshine hours falling to approximately 7.2 hours.

Winter Weather in Vernal

Winter in Vernal, beginning in December and ending in February, is characterized by cold temperatures, snowfall, and higher relative humidity. Temperatures hit their lowest, with February maintaining an average of 16.2°F (-8.8°C). December sees the highest snowfall at 4.29" (109mm), with snowfall days peaking in that month as well. On average, there are about 6.1 days of rainfall in December. Relative humidity increases considerably during this season, reaching a peak of 81% in January. Winter also signifies the shortest days of the year, December receiving just 9.3 hours of daylight.

Weather in January

January in Vernal, Utah, USA begins with chilly winter weather characterized by snowfall. Residents prepare for colder temperatures, with highs averaging around 30°F (-1.1°C) and lows plunging to 12.7°F (-10.7°C). The biting chill proves to be the main characteristic of January, setting the tone for the winter season. Weather in January »

Weather in February

February records a slight rise in temperature compared to January. With highs averaging 33.1°F (0.6°C) and lows resting at 16.5°F (-8.6°C), it remains cold but not as bitter. The humidity during February lowers slightly, bringing a bit of relief from the excessive moist chill of January. Weather in February »

Weather in March

As spring approaches in March, Vernal's weather takes a transitional turn. An increase in average high temperatures to 45.7°F (7.6°C) and lows to 28.9°F (-1.7°C) signifies a retreat from the grip of winter's frost. Rainfall gradually replaces snowfall, contributing to the refreshing spring onset. Weather in March »

Weather in April

Vernal embraces the full onset of spring in April with a significant rise in temperatures, with highs soaring to 55.2°F (12.9°C) and lows comfortably settled at 36.5°F (2.5°C). It is noticeably warmer compared to March, allowing outdoor activities to flourish. Weather in April »

Weather in May

May witnesses the last of the spring weather as it prepares to transition into summer. Vernal experiences a considerable jump in temperature, with highs averaging 65.8°F (18.8°C) and lows at 45.3°F (7.4°C). It registers less rainfall, making the weather pleasant for outdoor explorations. Weather in May »

Weather in June

June heralds the beginning of summer in Vernal, introducing longer days and warmer weather. It records an exponential rise in temperature, with average highs reaching 79.5°F (26.4°C) and lows at 55°F (12.8°C). The stark contrast in temperature with May highlights the drastic switch from spring to summer. Weather in June »

Weather in July

July, the peak of summer, experiences the hottest temperatures of the year in Vernal. The highs touch 85.6°F (29.8°C) while the lows sit at a balmy 62.4°F (16.9°C). The expected warm weather escalates the heat. The summer intensity results in residents seeking various means to stay cool, swims and picnics being popular choices. Weather in July »

Weather in August

The sizzling summer continues into August with temperatures not far from July's. High temperatures average 83.3°F (28.5°C) while lows hover around 60.4°F (15.8°C). Although marginally cooler than July, August still upholds the summer heat, making the nights pleasantly warm. Weather in August »

Weather in September

September marks the transition from summer to autumn. A decline in temperatures to 74.8°F (23.8°C) for highs and 52.9°F (11.6°C) for lows indicates the start of cooler nights. The fall color palette begins to adorn Vernal, asserting the arrival of fall. Weather in September »

Weather in October

October continues the mild autumn weather, showcasing an elegant blend of comfortably cool and warm weather. A significant drop in the temperature occurs with highs at 57.4°F (14.1°C) and lows at 38.7°F (3.7°C). As leaves continue to change colors, the scenic beauty of Vernal surfaces. Weather in October »

Weather in November

November presents a dramatic drop in temperature, signifying the imminent arrival of winter. The shift in weather exhibits highs of 44.2°F (6.8°C) and lows of 27.1°F (-2.7°C). The noticeable transformation from the mild October climate makes November relatively colder. Weather in November »

Weather in December

December in Vernal embraces the winter season fully, characterized by the coldest temperatures. With highs averaging at a chilling 31.1°F (-0.5°C) and lows dropping to 16.2°F (-8.8°C), the climate mimics that of January. The wintry beauty of Vernal prevails once again, adding a festive charm to the holiday season. Weather in December »
Updated: Jul 18, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What part of the year is the coldest?

In Vernal, the average lowest temperatures are observed in January, with a high of 30°F (-1.1°C) and a low of 12.7°F (-10.7°C).

What is the most humid month?

With an average relative humidity of 81%, January is the most humid month.

How much does it rain?

In Vernal, during the entire year, the rain falls for 83.2 days and collects up to 5.75" (146mm) of precipitation.

When does it snow?

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

How much does it snow?

Throughout the year, there are 43.6 snowfall days, and 16.81" (427mm) of snow is accumulated.

What is the month with the least sunshine?

With an average of 6.5h of sunshine, January has the least sunshine of the year.

What is the month with the lowest UV index?

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

When is Daylight Saving Time (DST) in Vernal?

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.

What is the rainiest month?

April is the month with the most rainfall. Rain falls for 10.8 days and accumulates 0.71" (18mm) of precipitation.

What is the least humid month?

The least humid month is June, with an average relative humidity of 30%.

When it does not snow?

June through September are months without snowfall.

When are the longest days?

June has the longest days of the year, with an average of 15h and 0min of daylight.

What month has the most sunshine?

With an average of 12h of sunshine, June has the most sunshine of the year.

What are the months with the highest UV index?

The months with the highest UV index are June through August, with an average maximum UV index of 6.

What is the warmest month?

July is the warmest month, with the temperature often reaching an average high of 85.6°F (29.8°C) and an average low of 62.4°F (16.9°C).

What is the driest month?

The month with the least rainfall is November, when the rain falls for 5.5 days and typically collects 0.31" (8mm) of precipitation.

When does it snow the most in Vernal?

The month with the most snowfall is December, when snow falls for 8.5 days and typically aggregates up to 4.29" (109mm) of snow.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 18min of daylight.

Average temperature
Vernal, UT

Average temperature - Vernal, UT

The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (30°F).

The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is January (12.7°F).

Average pressure
Vernal, UT

Average pressure - Vernal, UT

The month with the highest atmospheric pressure is January (30.29"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).

Average wind speed
Vernal, UT

Average wind speed - Vernal, UT

The windiest month (with the highest average wind speed) is June (7.5mph).
The calmest month (with the lowest average wind speed) is January (3.4mph).

Average rainfall
Vernal, UT

Average rainfall - Vernal, UT

The wettest month (with the highest rainfall) is April (0.71").
The driest month (with the least rainfall) is November (0.31").

Average rainfall days
Vernal, UT

Average rainfall days - Vernal, UT

The month with the highest number of rainy days is April (10.8 days).
The month with the least rainy days is January (5.4 days).

Average snowfall
Vernal, UT

Average snowfall - Vernal, UT

The month with the highest snowfall is December (4.29").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days
Vernal, UT

Average snowfall days - Vernal, UT

The month with the highest number of snowfall days is January (10.2 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight / Average sunshine
Vernal, UT

Average daylight / Average sunshine - Vernal, UT

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).

The month with the most sunshine is June (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 6h and 30min).

Average sunshine days
Vernal, UT

Average sunshine days - Vernal, UT

The month with the most sunshine days is October (22.4 days).
The month with the least sunshine days is April (15.3 days).

Average UV index
Vernal, UT

Average UV index - Vernal, UT

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

Average visibility
Vernal, UT

Average visibility - Vernal, UT

The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).

Vernal, Utah, USA

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