Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
May's arrival coincides with a temperature rise, moving from April's wintry 33.6°F (0.9°C) to a chilly 45.5°F (7.5°C). May nights in Jefferson bring a significant cooling from the heat of the day, with averages of 23.4°F (-4.8°C).Humidity
In Jefferson, Colorado, the average relative humidity in May is 71%.Rainfall
In Jefferson, in May, during 12.3 rainfall days, 3.23" (82mm) of precipitation is typically accumulated. In Jefferson, during the entire year, the rain falls for 110.4 days and collects up to 24.09" (612mm) of precipitation.Snowfall
January through December are months with snowfall. May is the month with the most snowfall in Jefferson. Snow falls for 19 days and accumulates 19.69" (500mm) of snow.Daylight
The average length of the day in May in Jefferson is 14h and 22min.On the first day of the month, sunrise is at 6:03 am and sunset at 7:57 pm. On the last day of May, sunrise is at 5:38 am and sunset at 8:23 pm MDT.
Sunshine
The average sunshine in May is 9.9h.UV index
May through August, with an average maximum UV index of 3, are months with the highest UV index in Jefferson. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: The UV index of 3 in May translates into these instructions:
Put precautions into practice - Ensuring skin and eye safety is a necessity. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
Frequently asked questions
What are May temperatures in Jefferson?
What is the average humidity in May in Jefferson?
How many days does it rain in May in Jefferson?
When does it snow the most in Jefferson?
How many days does it snow in May in Jefferson?
What is the average length of the day in May in Jefferson?
When are sunrise and sunset in May in Jefferson?
How long on average sun shines in May in Jefferson?
When is the highest UV index in Jefferson?
How high is the UV index in May in Jefferson?
Average temperature in May
Jefferson, CO
- Average high temperature in May: 45.5°F
The warmest month (with the highest average high temperature) is July (65.8°F).
The month with the lowest average high temperature is December (21.2°F).
- Average low temperature in May: 23.4°F
The month with the highest average low temperature is July (40.1°F).
The coldest months (with the lowest average low temperature) are January and December (0.7°F).
Average pressure in May
Jefferson, CO
- Average pressure in May: 29.94"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The months with the lowest atmospheric pressure are April and May (29.94"Hg).
Average wind speed in May
Jefferson, CO
- Average wind speed in May: 6.1mph
The windiest month (with the highest average wind speed) is February (7mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in May
Jefferson, CO
- Average humidity in May: 71%
The month with the highest relative humidity is February (89%).
The month with the lowest relative humidity is June (54%).
Average rainfall in May
Jefferson, CO
- Average rainfall in May: 3.23"
The wettest month (with the highest rainfall) is July (3.35").
The driest month (with the least rainfall) is November (1.14").
Average rainfall days in May
Jefferson, CO
- Average rainfall days in May: 12.3 days
The month with the highest number of rainy days is July (22.8 days).
The month with the least rainy days is November (2.8 days).
Average snowfall in May
Jefferson, CO
- Average snowfall in May: 19.69"
The month with the highest snowfall is May (19.69").
The month with the least snowfall is July (0.24").
Average snowfall days in May
Jefferson, CO
- Average snowfall days in May: 19 days
The month with the highest number of snowfall days is April (22.8 days).
The month with the least snowfall days is July (1.3 days).
Average daylight in May /
Average sunshine in May
Jefferson, 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: 9h and 5min
The month with the most sunshine is June (Average sunshine: 11h and 24min).
The month with the least sunshine is February (Average sunshine: 5h and 12min).
Average sunshine days in May
Jefferson, CO
- Average sunshine days in May: 7.5 days
The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is July (5.8 days).
Average UV index in May
Jefferson, CO
- Average UV index in May: 3
The months with the highest UV index are May, June, July and August (UV index 3).
The months with the lowest UV index are February and December (UV index 1).
Average cloud cover in May
Jefferson, CO
- Average cloud cover in May: 36
The month with the most cloud cover is February (Cloud cover 54).
The month with the least cloud cover is June (Cloud cover 19).
Average visibility in May
Jefferson, CO
- Average visibility in May: 5mi
The months with the highest visibility are June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, March, April and December (4mi).
Jefferson, Colorado, USA
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