Climate and monthly weather forecast
Denver, CO

The colorful sky above the sunlit Denver city, Colorado in autumn
The colorful sky above the sunlit Denver city, Colorado in autumn

The climate of Denver, CO

Denver has a semi-arid, continental type of climate (Köppen climate classification BSk) with hot summers and cold winters. Denver, the capital of Colorado, lies in the South Platte River Valley, east of the foothills of the Rocky Mountains. The nearby mountain areas influence the climate and produce microclimates of subtropical and humid continental nature in the adjacent regions of Denver.

Denver, the High Mile City, stands on the High Plains at an average elevation of one mile above sea level and consists of open areas in the city's center, while hills surround the west, north, and south regions. The difference between the daily high and low temperatures is extreme due to high elevation and aridness. Sunshine is plenty and registers almost 3100 hours over the year. Denver is a dry area with humidity rarely going above 57% at any time of the year.

Summers are hot and the high temperatures in the peak of July register above 90°F (32.2°C) for many days, some of which even touch 100°F (37.8°C). Annual precipitation is low to the tune of 14" (356mm), with 70% occurring during the summer.
Winters are cold with plenty of snow; snowfall registers to 54" (1372mm) in Denver, usually from October to April. December has the lowest temperatures during the year that average 17°F (-8.3°C) but a few nights may quickly plummet below -10°F (-23.3°C). Winter days average 42°F (5.6°C), but occasional cold fronts may see them go below 32°F (0°C) and even close to 0°F (-17.8°C). Chinook winds bring warmness during the winter. Tornadoes occur on the eastern side of Denver during spring and summer.

The best time to visit Denver, CO

April and May in spring and September and October in autumn are the best times to visit Denver with comfortable temperatures - the daily highs are warm 60°F (15.6°C) to 78°F (25.6°C), while the nightly lows are between 34°F (1.1°C) to 48°F (8.9°C).
The summer season is hot, while the winters are cold. Summer attracts tourists in large numbers and competition for campsites along the popular trails. Thunderstorms and tornadoes also invade Denver during the summer.

The worst time to visit Denver, CO

November to February is the worst time to visit Denver, as the winter is severe with heavy snow accumulation.
The plains bear the grunt of the chilly gusts of wind in the cold season. Frost is a regular guest even though the days rarely lack sunshine. Freezing nights are not a welcome proposal to the tourists, even though a few visitors endure them in the hope of the open ski season on the mountain slopes. Winter has discounted rates the majority of the time due to the inclement weather.

Weather hazards

Denver is prone to wildfires, thunderstorms, tornadoes, and hailstorms during summer and snowstorms during the winter. The scorching heat makes the area susceptible to wildfires such as the Hayman Fire of 2002. Thunderstorms with lightning are frequent during the summer, especially in the surrounding high mountainous regions, while tornadoes strike mostly the areas near the eastern suburbs of Denver. Blizzards are occasional in the rough winter weather, deposit large amounts of snow that poses difficulty for vehicular movement, and generally, stall daily life.

Weather in January

January, like December, in Denver, Colorado, is another cold winter month, with temperature in the range of an average high of 40.5°F (4.7°C) and an average low of 21.6°F (-5.8°C). In Denver, Colorado, the average high-temperature in January is essentially the same as in December - a still wintry 40.5°F (4.7°C). Weather in January »

Weather in February

February, the last month of the winter in Denver, is also a wintry month, with an average temperature fluctuating between 20.8°F (-6.2°C) and 40.5°F (4.7°C). In February, the average high-temperature remains the same as in January - a still wintry 40.5°F (4.7°C). Weather in February »

Weather in March

March, the first month of the spring in Denver, is a fresh month, with an average temperature varying between 51.4°F (10.8°C) and 29.7°F (-1.3°C). In Denver, the average high-temperature in March increases from a wintry 40.5°F (4.7°C) in February to a cool 51.4°F (10.8°C). Weather in March »

Weather in April

April in Denver, Colorado, is a mild spring month, with an average temperature ranging between max 57.2°F (14°C) and min 34.3°F (1.3°C). In April, the average high-temperature slightly increases from a cool 51.4°F (10.8°C) in March to a mild 57.2°F (14°C). Weather in April »

Weather in May

May, the last month of the spring in Denver, is a comfortable month, with an average temperature fluctuating between 65.8°F (18.8°C) and 42.4°F (5.8°C). In May, the average high-temperature slightly increases from a mild 57.2°F (14°C) in April to a comfortable 65.8°F (18.8°C). Weather in May »

Weather in June

The first month of the summer, June, is a warm month in Denver, Colorado, with an average temperature fluctuating between 81°F (27.2°C) and 54.5°F (12.5°C). In June, the average high-temperature soars, from an enjoyable 65.8°F (18.8°C) in May, to a warm 81°F (27.2°C). Weather in June »

Weather in July

July, like June, in Denver, Colorado, is a moderately hot summer month, with temperature in the range of an average high of 84.4°F (29.1°C) and an average low of 59.2°F (15.1°C). The warmest month is July, with an average high-temperature of 84.4°F (29.1°C) and an average low-temperature of 59.2°F (15.1°C). The average heat index in July is calculated to be 84.2°F (29°C). Weather in July »

Weather in August

The last month of the summer, August, is another warm month in Denver, Colorado, with an average temperature fluctuating between 83.1°F (28.4°C) and 58.3°F (14.6°C). In Denver, the average high-temperature in August is almost the same as in July - a still moderately hot 83.1°F (28.4°C). Weather in August »

Weather in September

The first month of the autumn, September, is still a warm month in Denver, Colorado, with temperature in the range of an average high of 76.6°F (24.8°C) and an average low of 51.4°F (10.8°C). In Denver, the average high-temperature in September marginally drops from 83.1°F (28.4°C) in August to a still warm 76.6°F (24.8°C). Weather in September »

Weather in October

October, the same as September, is another comfortable autumn month in Denver, Colorado, with an average temperature ranging between min 38.3°F (3.5°C) and max 61.3°F (16.3°C). In October, the average high-temperature plummets from a moderately hot 76.6°F (24.8°C) in September to an enjoyable 61.3°F (16.3°C). Weather in October »

Weather in November

The last month of the autumn, November, is also a fresh month in Denver, Colorado, with temperature in the range of an average high of 50.7°F (10.4°C) and an average low of 29.1°F (-1.6°C). In Denver, the average high-temperature in November drops from an enjoyable 61.3°F (16.3°C) in October to a fresh 50.7°F (10.4°C). Weather in November »

Weather in December

December, the first month of the winter in Denver, is also a wintry month, with an average temperature fluctuating between 39.9°F (4.4°C) and 20.7°F (-6.3°C). The coldest month is December, with an average high-temperature of 39.9°F (4.4°C) and an average low-temperature of 20.7°F (-6.3°C). Weather in December »
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FAQ

What is the driest month in Denver?

January and December are months with the least rain in Denver, Colorado, when the rain falls for 3.7 days and typically aggregates up to 0.39" (10mm) of rain.

How much does it rain in Denver?

In Denver, Colorado, during the entire year, the rain falls for 119.5 days and collects up to 12.95" (329mm) of precipitation.

When does it snow in Denver?

Months with snowfall in Denver, Colorado, are January through May, October through December.

How many days does it snow in Denver?

Throughout the year, in Denver, there are 43.5 snowfall days, and 35.67" (906mm) of snow is accumulated.

When is the lowest UV index in Denver?

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

What is the most humid month in Denver?

February is the most humid month in Denver, Colorado, with an average relative humidity of 66%.

What is the month with the least sunshine in Denver?

The month with the least sunshine is February, with an average of 6.9h of sunshine.

What is the snowiest month in Denver?

The month with the most snowfall is March, when snow falls for 6.7 days and typically aggregates up to 6.26" (159mm) of snow.

When is Daylight Saving Time (DST) in Denver?

On Sunday, March 12. 2023, at 2:00 am, Daylight Saving Time starts in Denver, and the time zone changes from MST to MDT. Daylight Saving Time ends Sunday, November 5. 2023, at 2:00 am, and the time zone reverts from MDT to MST.

What is the rainiest month in Denver?

The month with the most rainfall in Denver, Colorado, is May, when the rain falls for 18.2 days and typically aggregates up to 2.36" (60mm) of precipitation.

What is the least humid month in Denver?

The least humid month in Denver is June, with an average relative humidity of 41%.

When it does not snow in Denver?

In Denver, snow does not fall in June through September.

When are the longest days in Denver?

The month with the longest days is June, with an average of 14h and 56min of daylight.

What are the months with the most sunshine in Denver?

The months with the most sunshine in Denver, Colorado, are June through August, with an average of 11.8h of sunshine.

When is the highest UV index in Denver?

June and July, with an average maximum UV index of 6, are months with the highest UV index in Denver.

What is the warmest month in Denver?

July is the warmest month in Denver, Colorado, with an average high-temperature of 84.4°F (29.1°C) and an average low-temperature of 59.2°F (15.1°C).

What is the coldest month in Denver?

With an average high-temperature of 39.9°F (4.4°C) and an average low-temperature of 20.7°F (-6.3°C), December is the coldest month in Denver, Colorado.

What is the month with the shortest days in Denver?

With an average of 9h and 25min of daylight, December has the shortest days of the year in Denver, Colorado.

Average temperature
Denver, CO

Average temperature - Denver, CO

The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is December (39.9°F).

The month with the highest average low temperature is July (59.2°F).
The coldest month (with the lowest average low temperature) is December (20.7°F).

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Average pressure
Denver, CO

Average pressure - Denver, CO

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is April (29.91"Hg).

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Average wind speed
Denver, CO

Average wind speed - Denver, CO

The windiest month (with the highest average wind speed) is April (6.6mph).
The calmest months (with the lowest average wind speed) are August and September (5.7mph).

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Average rainfall
Denver, CO

Average rainfall - Denver, CO

The wettest month (with the highest rainfall) is May (2.36").
The driest months (with the least rainfall) are January and December (0.39").

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Average rainfall days
Denver, CO

Average rainfall days - Denver, CO

The month with the highest number of rainy days is July (18.4 days).
The month with the least rainy days is January (3.7 days).

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Average snowfall
Denver, CO

Average snowfall - Denver, CO

The month with the highest snowfall is March (6.26").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days
Denver, CO

Average snowfall days - Denver, CO

The month with the highest number of snowfall days is February (9.3 days).
The months with the least snowfall days are June, July and August (0 days).

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Average daylight / Average sunshine
Denver, CO

Average daylight / Average sunshine - Denver, CO

The month with the longest days is June (Average daylight: 14h and 56min).
The month with the shortest days is December (Average daylight: 9h and 25min).

The months with the most sunshine are June, July and August (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 6h and 54min).

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Average sunshine days
Denver, CO

Average sunshine days - Denver, CO

The month with the most sunshine days is November (23 days).
The month with the least sunshine days is July (5.6 days).

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Average UV index
Denver, CO

Average UV index - Denver, CO

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

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Average visibility
Denver, CO

Average visibility - Denver, CO

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).

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