May weather forecast
Greenhorn, CO

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Weather in May

The last month of the spring, May, is a pleasant month in Greenhorn, Colorado, with an average temperature fluctuating between 70.3°F (21.3°C) and 46.6°F (8.1°C).

Temperature

The start of May signals a slight increase in the average high-temperature, moving from a refreshing 61.5°F (16.4°C) in April to a pleasant 70.3°F (21.3°C). A sharp divergence from daytime highs is noted during the month of May, with the average nighttime temperature settling at a frosty 46.6°F (8.1°C).

Humidity

The average relative humidity in May is 45%.

Rainfall

In Greenhorn, in May, it is raining for 14 days, with typically 1.81" (46mm) of accumulated precipitation. In Greenhorn, during the entire year, the rain falls for 120.5 days and collects up to 14.92" (379mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. May is the last month it regularly snows. During 0.6 snowfall days, in May, Greenhorn aggregates 0.24" (6mm) of snow. In Greenhorn, during the entire year, snow falls for 33.9 days and aggregates up to 23.27" (591mm) of snow.

Daylight

In Greenhorn, the average length of the day in May is 14h and 14min.
On the first day of the month, sunrise is at 6:02 am and sunset at 7:50 pm. On the last day of May, sunrise is at 5:38 am and sunset at 8:15 pm MDT.

Sunshine

In Greenhorn, the average sunshine in May is 11.5h.

UV index

In Greenhorn, the average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: The UV index of 5 during May translates into the following guidance:
Make use of precautions - Shielding skin and eyes from injury is a requirement. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Updated: Aug 30, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average May temperature?

In Greenhorn, in May, the average high-temperature is 70.3°F (21.3°C), and the average low-temperature is 46.6°F (8.1°C).

What is the average humidity in May?

The average relative humidity in May is 45%.

How much does it rain in May?

In May, the rain falls for 14 days. Throughout May, 1.81" (46mm) of precipitation is accumulated.

What is the last month it snows?

May is the last month it regularly snows. During 0.6 snowfall days, in May, Greenhorn aggregates 0.24" (6mm) of snow.

How many hours of daylight does Greenhorn have in May?

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

What time are sunrise and sunset in May?

On the first day of May, sunrise is at 6:02 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 5:38 am and sunset at 8:15 pm MDT.

How long on average sun shines in May?

In May, the average sunshine duration is 11.5h.

What is the UV index intensity in May?

In May, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate health threat 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
Greenhorn, CO

Average temperature in May - Greenhorn, CO
  • Average high temperature in May: 70.3°F

The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is December (41.5°F).

  • Average low temperature in May: 46.6°F

The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is December (23°F).

Average pressure in May
Greenhorn, CO

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

The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is April (29.89"Hg).

Average wind speed in May
Greenhorn, CO

Average wind speed in May - Greenhorn, CO
  • Average wind speed in May: 7.8mph

The windiest month (with the highest average wind speed) is April (8.3mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).

Average humidity in May
Greenhorn, CO

Average humidity in May - Greenhorn, CO
  • Average humidity in May: 45%

The month with the highest relative humidity is February (62%).
The month with the lowest relative humidity is June (38%).

Average rainfall in May
Greenhorn, CO

Average rainfall in May - Greenhorn, CO
  • Average rainfall in May: 1.81"

The wettest month (with the highest rainfall) is July (2.76").
The driest month (with the least rainfall) is November (0.43").

Average rainfall days in May
Greenhorn, CO

Average rainfall days in May - Greenhorn, CO
  • Average rainfall days in May: 14 days

The month with the highest number of rainy days is July (20.4 days).
The month with the least rainy days is November (3.9 days).

Average snowfall in May
Greenhorn, CO

Average snowfall in May - Greenhorn, CO
  • Average snowfall in May: 0.24"

The month with the highest snowfall is February (6.06").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in May
Greenhorn, CO

Average snowfall days in May - Greenhorn, CO
  • Average snowfall days in May: 0.6 days

The month with the highest number of snowfall days is February (7.9 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in May /
Average sunshine in May
Greenhorn, CO

Average daylight in May / Average sunshine in May - Greenhorn, CO
  • Average daylight in May: 14h and 1min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in May: 11h and 3min

The month with the most sunshine is June (Average sunshine: 12h and 0min).
The month with the least sunshine is February (Average sunshine: 6h and 48min).

Average sunshine days in May
Greenhorn, CO

Average sunshine days in May - Greenhorn, CO
  • Average sunshine days in May: 13.2 days

The month with the most sunshine days is November (23.8 days).
The month with the least sunshine days is July (5.1 days).

Average UV index in May
Greenhorn, CO

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

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

Average cloud cover in May
Greenhorn, CO

Average cloud cover in May - Greenhorn, CO
  • Average cloud cover in May: 21

The months with the most cloud cover are February and April (Cloud cover 23).
The months with the least cloud cover are June and September (Cloud cover 14).

Average visibility in May
Greenhorn, CO

Average visibility in May - Greenhorn, 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).

Greenhorn, Colorado, USA

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