Denver, CO - Detailed climate information and monthly weather forecast

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The colorful sky above the sunlit Denver city, Colorado in autumn, with a water body surrounded by trees, and majestic skyscrapers afar

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 32.2°C (90°F) for many days, some of which even touch 37.8°C (100°F). Annual precipitation is low to the tune of 355.6mm (14"), with 70% occurring during the summer.
Winters are cold with plenty of snow; snowfall registers to 1371.6mm (54") in Denver, usually from October to April. December has the lowest temperatures during the year that average -8.3°C (17°F) but a few nights may quickly plummet below -23.3°C (-10°F). Winter days average 5.6°C (42°F), but occasional cold fronts may see them go below 0°C (32°F) and even close to -17.8°C (0°F). Chinook winds bring warmness during the winter. Tornadoes occur on the eastern side of Denver during spring and summer.

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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 15.6°C (60°F) to 25.6°C (78°F), while the nightly lows are between 1.1°C (34°F) to 8.9°C (48°F).
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.

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.

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.

January is a cold and snowy month of the year in Denver with the average low temperature of frigid -8.3°C (17°F) and a few days even below -17.8°C (0°F). Weather in January »

February is wintertime in Denver with the average temperatures in the -6.7°C (20°F) to 7.8°C (46°F) range. Weather in February »

March is the snowiest month of the year and is a transitional month from winter to spring. Snowfall gathers to 271.8mm (10.7") as Denver sees average temperatures in the -3.3°C (26°F) to 12.2°C (54°F) range. Weather in March »

April is one of the best times to visit Denver as the weather warms up to an average of 1.1°C (34°F) to 16.1°C (61°F). Weather in April »

The sunlight lasts for a massive 14 hours as the spring brings rainfall to the tune of 53.3mm (2.1") in one out of three days in May. Weather in May »

June brings sunny days to Denver with the average summer temperatures in the 11.7°C (53°F) to 27.2°C (81°F) range. A few days touch 32.2°C (90°F), while the 35°C (95°F) mark sees a rare crossing. Weather in June »

July is usually the hottest month of the year, with an average high temperature of 31.1°C (88°F). Few days are almost 35°C (95°F), while nights rarely go below 10°C (50°F) and average 15°C (59°F). Weather in July »

August is a hot summer month in Denver with average temperatures in the 13.9°C (57°F) to 30°C (86°F). Daylight lasts for 14 hours with plenty of sunshine. Weather in August »

September is one of the best times to visit Denver and is the gateway to the pleasant autumn season. Average temperatures are in the range of 8.9°C (48°F) to 25°C (77°F). Weather in September »

October is a beautiful fall month with dry and sunny weather. Although the average temperatures are in the 2.2°C (36°F) to 18.3°C (65°F), the days tend to be warm but nights cool down quickly. Weather in October »

November sees cold weather in Denver at the end of the fall season with the average temperatures between -3.9°C (25°F) to 11.1°C (52°F). Weather in November »

December is the coldest month in Denver with an average low temperature of -8.3°C (17°F) and the average high temperature of 6.1°C (43°F). Weather in December »
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How many days does it rain in Denver?

Throughout the year, in Denver, there are 79.7 rainfall days, and 363.2mm (14.3") of precipitation is accumulated.

When does it snow in Denver?

January through May, September through December are months with snowfall in Denver, Colorado.

How many days does it snow in Denver?

Throughout the year, in Denver, there are 33.3 snowfall days, and 1366.5mm (53.8") of snow is accumulated.

When does it snow the most in Denver?

The month with the most snowfall is March when snow falls for 5.8 days and typically aggregates up to 271.8mm (10.7") of snow.

What is the warmest month in Denver?

The warmest month is July, with an average high-temperature of 31.9°C (89.4°F) and an average low-temperature of 14.9°C (58.8°F).

What is the rainiest month in Denver?

The month with the most rainfall is July when the rain falls for 8.3 days and typically aggregates up to 55.9mm (2.2") of precipitation.

What is the coldest month in Denver?

With an average high-temperature of 6°C (42.8°F) and an average low-temperature of -8.3°C (17.1°F), December is the coldest month.

What is the driest month in Denver?

The month with the least rainfall is December when the rain falls for 4.1 days and typically collects 10.2mm (0.4") of precipitation.

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Climate J F M A M J J A S O N D Year

Average high temperature in January:
6.7°C
Average high temperature in February:
7.9°C
Average high temperature in March:
12.4°C
Average high temperature in April:
16.4°C
Average high temperature in May:
21.9°C
Average high temperature in June:
28°C

Average high temperature in July:
31.9°C
Average high temperature in August:
30.7°C
Average high temperature in September:
25.8°C
Average high temperature in October:
18.5°C
Average high temperature in November:
11.2°C
Average high temperature in December:
6°C

The warmest month (with the highest average high temperature) is July (31.9°C).
The month with the lowest average high temperature is December (6°C).

Average low temperature in January:
-8.1°C
Average low temperature in February:
-7.3°C
Average low temperature in March:
-3.1°C
Average low temperature in April:
0.7°C
Average low temperature in May:
5.9°C
Average low temperature in June:
11.3°C

Average low temperature in July:
14.9°C
Average low temperature in August:
14.4°C
Average low temperature in September:
9.1°C
Average low temperature in October:
2.6°C
Average low temperature in November:
-4.2°C
Average low temperature in December:
-8.3°C

The month with the highest average low temperature is July (14.9°C).
The coldest month (with the lowest average low temperature) is December (-8.3°C).

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The month with the highest relative humidity is December (56.6%).
The month with the lowest relative humidity is July (47.8%).

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The wettest month (with the highest rainfall) is July (54.9mm).
The driest month (with the lowest rainfall) is December (8.9mm).

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Average rainfall days in January:
4.1 days
Average rainfall days in February:
5.3 days
Average rainfall days in March:
5.9 days
Average rainfall days in April:
9.1 days
Average rainfall days in May:
9.4 days
Average rainfall days in June:
8.4 days

Average rainfall days in July:
8.3 days
Average rainfall days in August:
8.6 days
Average rainfall days in September:
6.5 days
Average rainfall days in October:
5.3 days
Average rainfall days in November:
4.7 days
Average rainfall days in December:
4.1 days

The month with the highest number of rainy days is May (9.4 days).
Months with the lowest number of rainy days are January and December (4.1 days).

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The month with the highest snowfall is March (271.8mm).
Months with the lowest snowfall are June, July and August (0mm).

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Average snowfall days in January:
5 days
Average snowfall days in February:
5.3 days
Average snowfall days in March:
5.8 days
Average snowfall days in April:
4.1 days
Average snowfall days in May:
0.6 days
Average snowfall days in June:
0 days

Average snowfall days in July:
0 days
Average snowfall days in August:
0 days
Average snowfall days in September:
0.5 days
Average snowfall days in October:
1.8 days
Average snowfall days in November:
4.9 days
Average snowfall days in December:
5.3 days

The month with the highest number of snowfall days is March (5.8 days).
Months with the lowest number of snowfall days are June, July and August (0 days).

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Average daylight / Average sunshine - Denver, CO

The month with the longest days is June (Average daylight: 15h).
The month with shortest days is December (Average daylight: 9.4h).

Months with most sunshine are June and July (Average sunshine: 10.5h).
The month with least sunshine is December (Average sunshine: 6.3h).

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The month with the highest UV index is July (UV index 11).
Months with the lowest UV index are January and December (UV index 2).

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Climate J F M A M J J A S O N D Year

°Celsius °Fahrenheit

Mar	FEB	Mar
	23
2019	2020	2021

Monthly weather forecast and climate
Denver, CO US

Contents

The climate of Denver, CO

The best time to visit Denver, CO

The worst time to visit Denver, CO

Weather hazards

Weather in January

Weather in February

Weather in March

Weather in April

Weather in May

Weather in June

Weather in July

Weather in August

Weather in September

Weather in October

Weather in November

Weather in December