May weather forecast
Denver, CO

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

Weather in May



As Denver steps into May, the city embraces clear signs of spring and lays down the groundwork for the sweltering heat of the impending summer. With an average high soaring up to 65.8°F (18.8°C), May indicates a considerable shift from the chills of April, encapsulating the biggest upward temperature trend of the year. Moreover, signs of changing weather patterns become clearly noticeable with an increase in both daylight and sunshine hours, often accompanied by pleasant warm breezes. However, May is also the rainiest month, experiencing rainfall of up to 2.36" (60mm). Thus, Denver's May weather is a dynamic blend of blue skies and warm days interspersed with refreshing bouts of soothing rainfall.


Temperature

As Denver transitions into May, a marginal rise in the average high-temperature is observed, moving from 57.2°F (14°C) in April to a still refreshing 65.8°F (18.8°C). A marked drop from daytime peak temperatures to an average low-temperature of 42.4°F (5.8°C) is observed during the nights in May.

Humidity

In May, the average relative humidity is 52%.

Rainfall

May is the month with the most rainfall in Denver. Rain falls for 18.2 days and accumulates 2.36" (60mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall in Denver. May is the last month it regularly snows. During 1.8 snowfall days, in May, Denver aggregates 2.72" (69mm) of snow. In Denver, during the entire year, snow falls for 43.5 days and aggregates up to 35.67" (906mm) of snow.

Daylight

The average length of the day in May in Denver, Colorado, is 14h and 23min.
On the first day of the month, sunrise is at 5:59 am and sunset at 7:54 pm. On the last day of May, sunrise is at 5:33 am and sunset at 8:21 pm MDT.

Sunshine

In May, the average sunshine is 11.2h.

UV index

The average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: An average maximum UV index of 5 in May leads to these recommendations:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
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Frequently asked questions

What are the temperatures in Denver in May?

During May, Denver experiences an average high-temperature of 65.8°F (18.8°C) and a low-temperature of 42.4°F (5.8°C).

What is the average humidity in May in Denver?

The average relative humidity in May is 52%.

What is the wettest month in Denver?

May is the month with the most rainfall. Rain falls for 18.2 days and accumulates 2.36" (60mm) of precipitation.

How many days does it rain in May in Denver?

In Denver, in May, during 18.2 rainfall days, 2.36" (60mm) of precipitation is typically accumulated.

What is the last month it snows in Denver?

May is the last month it regularly snows in Denver, Colorado. During 1.8 snowfall days, in May, Denver aggregates 2.72" (69mm) of snow.

What is the average length of the day in May in Denver?

The average day length in May is 14h and 23min.

When are sunrise and sunset in May in Denver?

In May, on the first day of the month, sunrise is at 5:59 am and sunset at 7:54 pm. On the last day of the month, sunrise is at 5:33 am and sunset at 8:21 pm MDT.

How many hours of sunshine does Denver have in May?

The average sunshine duration in May in Denver is 11.2h.

What is the UV index intensity in May in Denver?

In Denver, Colorado, the average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a medium hazard to health from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Denver, CO

Average temperature in May - Denver, CO
  • Average high temperature in May: 65.8°F

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).

  • Average low temperature in May: 42.4°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 in May
Denver, CO

Average pressure in May - Denver, CO
  • Average pressure in May: 29.92"Hg

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 in May
Denver, CO

Average wind speed in May - Denver, CO
  • Average wind speed in May: 5.9mph

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 humidity in May
Denver, CO

Average humidity in May - Denver, CO
  • Average humidity in May: 52%

The month with the highest relative humidity is February (66%).
The month with the lowest relative humidity is June (41%).

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Average rainfall in May
Denver, CO

Average rainfall in May - Denver, CO
  • Average rainfall in May: 2.36"

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 in May
Denver, CO

Average rainfall days in May - Denver, CO
  • Average rainfall days in May: 18.2 days

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 in May
Denver, CO

Average snowfall in May - Denver, CO
  • Average snowfall in May: 2.72"

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 in May
Denver, CO

Average snowfall days in May - Denver, CO
  • Average snowfall days in May: 1.8 days

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 in May /
Average sunshine in May
Denver, CO

Average daylight in May / Average sunshine in May - Denver, CO
  • Average daylight in May: 14h and 2min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in May: 11h and 1min

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 in May
Denver, CO

Average sunshine days in May - Denver, CO
  • Average sunshine days in May: 9.1 days

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 in May
Denver, CO

Average UV index in May - Denver, CO
  • Average UV index in May: 5

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 cloud cover in May
Denver, CO

Average cloud cover in May - Denver, CO
  • Average cloud cover in May: 25

The month with the most cloud cover is April (Cloud cover 26).
The month with the least cloud cover is September (Cloud cover 15).

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Average visibility in May
Denver, CO

Average visibility in May - Denver, CO
  • Average visibility in May: 6mi

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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Denver, Colorado, USA

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