May weather forecast
Fort Collins, CO

A scenic residential estate in Fort Collins, Colorado
A scenic residential estate in Fort Collins, Colorado

Weather in May

May, the last month of the spring in Fort Collins, is a comfortable month, with an average temperature varying between 63.3°F (17.4°C) and 40.6°F (4.8°C).

Temperature

In Fort Collins, the average high-temperature in May slightly increases from a cool 54.5°F (12.5°C) in April to a comfortable 63.3°F (17.4°C). The average low-temperature, in May, is 40.6°F (4.8°C).

Humidity

In Fort Collins, Colorado, the average relative humidity in May is 56%.

Rainfall

May is the month with the most rainfall. Rain falls for 12.1 days and accumulates 1.5" (38mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall in Fort Collins. May is the last month it regularly snows. During 1.1 snowfall days, Fort Collins aggregates 1.22" (31mm) of snow. In Fort Collins, Colorado, during the entire year, snow falls for 21.2 days and aggregates up to 15.98" (406mm) of snow.

Daylight

In May, the average length of the day is 14h and 28min.
On the first day of the month, sunrise is at 5:58 am and sunset at 7:56 pm. On the last day of May, sunrise is at 5:31 am and sunset at 8:24 pm MDT.

Sunshine

In Fort Collins, the average sunshine in May is 10.8h.

UV index

In Fort Collins, Colorado, the average daily maximum UV index in May is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: In May, the average maximum UV index of 4 translate into the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the average humidity in May in Fort Collins?

In May, the average relative humidity in Fort Collins, Colorado, is 56%.

What is the rainiest month in Fort Collins?

May is the month with the most rainfall. Rain falls for 12.1 days and accumulates 1.5" (38mm) of precipitation.

How much does it rain in Fort Collins in May?

In Fort Collins, Colorado, in May, it is raining for 12.1 days, with typically 1.5" (38mm) of accumulated precipitation.

What is the last month it snows in Fort Collins?

May is the last month it regularly snows. During 1.1 snowfall days, in May, Fort Collins aggregates 1.22" (31mm) of snow.

What is the average length of the day in May in Fort Collins?

In Fort Collins, Colorado, the average day length in May is 14h and 28min.

When is the sunrise / sunset in May in Fort Collins?

On the first day of May, sunrise is at 5:58 am and sunset at 7:56 pm. On the last day of the month, sunrise is at 5:31 am and sunset at 8:24 pm MDT.

How many hours of sunshine does Fort Collins have in May?

The average sunshine duration in May is 10.8h.

What is the UV index intensity in May in Fort Collins?

In Fort Collins, Colorado, the average daily maximum UV index in May is 4. A UV Index reading of 3 to 5 represents a moderate vulnerability from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Fort Collins, CO

Average temperature in May - Fort Collins, CO
  • Average high temperature in May: 63.3°F

The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is December (36.1°F).

  • Average low temperature in May: 40.6°F

The month with the highest average low temperature is July (56.8°F).
The coldest month (with the lowest average low temperature) is December (18.7°F).

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Average pressure in May
Fort Collins, CO

Average pressure in May - Fort Collins, CO
  • Average pressure in May: 29.91"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

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Average wind speed in May
Fort Collins, CO

Average wind speed in May - Fort Collins, CO
  • Average wind speed in May: 6.5mph

The windiest month (with the highest average wind speed) is April (7.6mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).

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Average humidity in May
Fort Collins, CO

Average humidity in May - Fort Collins, CO
  • Average humidity in May: 56%

The month with the highest relative humidity is February (67%).
The months with the lowest relative humidity are June, August and September (45%).

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Average rainfall in May
Fort Collins, CO

Average rainfall in May - Fort Collins, CO
  • Average rainfall in May: 1.5"

The wettest month (with the highest rainfall) is May (1.5").
The driest month (with the least rainfall) is January (0.12").

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Average rainfall days in May
Fort Collins, CO

Average rainfall days in May - Fort Collins, CO
  • Average rainfall days in May: 12.1 days

The month with the highest number of rainy days is July (14.6 days).
The month with the least rainy days is January (1.2 days).

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Average snowfall in May
Fort Collins, CO

Average snowfall in May - Fort Collins, CO
  • Average snowfall in May: 1.22"

The month with the highest snowfall is April (3.27").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in May
Fort Collins, CO

Average snowfall days in May - Fort Collins, CO
  • Average snowfall days in May: 1.1 days

The month with the highest number of snowfall days is February (4.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in May /
Average sunshine in May
Fort Collins, CO

Average daylight in May / Average sunshine in May - Fort Collins, CO
  • Average daylight in May: 14h and 28min

The month with the longest days is June (Average daylight: 15h and 2min).
The month with the shortest days is December (Average daylight: 9h and 20min).

  • Average sunshine in May: 10h and 48min

The month with the most sunshine is June (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 6h and 42min).

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Average sunshine days in May
Fort Collins, CO

Average sunshine days in May - Fort Collins, CO
  • Average sunshine days in May: 17.1 days

The months with the most sunshine days are January and December (27.5 days).
The month with the least sunshine days is July (14.9 days).

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Average UV index in May
Fort Collins, CO

Average UV index in May - Fort Collins, CO
  • Average UV index in May: 4

The month with the highest UV index is 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
Fort Collins, CO

Average cloud cover in May - Fort Collins, CO
  • Average cloud cover in May: 27

The months with the most cloud cover are February, April and May (Cloud cover 27).
The month with the least cloud cover is September (Cloud cover 16).

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Average visibility in May
Fort Collins, CO

Average visibility in May - Fort Collins, 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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