May weather forecast and climate
Denver, CO

The colorful sky above the sunlit Denver city, Colorado in autumn, with a water body surrounded by trees, and majestic skyscrapers afar
The colorful sky above the sunlit Denver city, Colorado in autumn, with a water body surrounded by trees, and majestic skyscrapers afar
The last month of the spring, May, is a comfortable month in Denver, Colorado, with average temperature varying between 42.4°F (5.8°C) and 65.8°F (18.8°C).

Temperature

In Denver, the average high-temperature in May slightly increases, from a mild 57.2°F (14°C) in April, to a comfortable 65.8°F (18.8°C). The average low-temperature, in May, is 42.4°F (5.8°C).

Humidity

The average relative humidity in Denver 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

Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 1.8 snowfall days, in May, Denver aggregates 2.72" (69mm) of snow. Throughout the year, there are 43.5 snowfall days, and 35.67" (906mm) of snow is accumulated.

Daylight

In Denver, the average length of the day is 14.4h.

Sunshine

In May, the average sunshine is 11.2h.

UV index

The average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to the UV radiation for the ordinary person.
Note: In May, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the temperature in May in Denver?

The average high-temperature, in May, is 65.8°F (18.8°C), while the average low-temperature is 42.4°F (5.8°C).

What is the average humidity in May in Denver?

In Denver, Colorado, the average relative humidity in May is 52%.

How many days does it rain in May in Denver?

In May, in Denver, Colorado, the rain falls for 18.2 days. Throughout May, 2.36" (60mm) of precipitation is accumulated.

What is the rainiest month in Denver?

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

What is the last month it snows in Denver?

May is the last month it regularly snows. 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 length of the day in May in Denver, Colorado, is 14.4h.

How long on average sun shines in May in Denver?

In May, the average sunshine is 11.2h.

How high is the UV index in May in Denver?

The average daily maximum UV index in May in Denver, Colorado, is 5. A UV Index value of 3 to 5 symbolizes a moderate health threat from unprotected exposure to the UV radiation.
Average temperature in May - Denver, CO
  • Average high temperature in May: 18.8°C

The warmest month (with the highest average high temperature) is July (29.1°C).
The month with the lowest average high temperature is December (4.4°C).

  • Average low temperature in May: 5.8°C

The month with the highest average low temperature is July (15.1°C).
The coldest month (with the lowest average low temperature) is December (-6.3°C).

Average pressure in May - Denver, CO
  • Average pressure in May: 1013.2mbar

The month with the highest atmospheric pressure is January (1020.7mbar).
The month with the lowest atmospheric pressure is April (1012.9mbar).

Average wind speed in May - Denver, CO
  • Average wind speed in May: 9.5km/h

The windiest month (with the highest average wind speed) is April (10.6km/h).
The calmest months (with the lowest average wind speed) are August and September (9.2km/h).

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%).

Average rainfall in May - Denver, CO
  • Average rainfall in May: 60mm

The wettest month (with the highest rainfall) is May (60mm).
The driest months (with the least rainfall) are January and December (10mm).

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).

Average snowfall in May - Denver, CO
  • Average snowfall in May: 69mm

The month with the highest snowfall is March (159mm).
Months with the least snowfall are June, July, August and September (0mm).

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).
Months with the least snowfall days are June, July and August (0 days).

Average daylight in May / Average sunshine in May - Denver, CO
  • Average daylight in May: 14.4h

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

  • Average sunshine in May: 11.2h

Months with the most sunshine are June, July and August (Average sunshine: 11.8h).
The month with the least sunshine is February (Average sunshine: 6.9h).

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).

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

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

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).

Average visibility in May - Denver, CO
  • Average visibility in May: 10km

Months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (10km).
The month with the lowest visibility is February (9km).