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 sees a mild rise in the average high-temperature, transitioning from April's mild 57.7°F (14.3°C) to a comfortable 66.4°F (19.1°C). In stark contrast to the day's heat, the temperature dips to an average of 42.6°F (5.9°C) during May nights.Humidity
The average relative humidity in May is 54%.Rainfall
May is the month with the most rainfall in Niwot. Rain falls for 15 days and accumulates 1.69" (43mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. May is the last month it regularly snows in Niwot. During 1.3 snowfall days, in May, Niwot aggregates 1.42" (36mm) of snow. Throughout the year, in Niwot, there are 37.1 snowfall days, and 26.73" (679mm) of snow is accumulated.Daylight
The average length of the day in May in Niwot, Colorado, is 14h and 25min.On the first day of May, sunrise is at 5:59 am and sunset at 7:56 pm. On the last day of the month, sunrise is at 5:33 am and sunset at 8:23 pm MDT.
Sunshine
In May, the average sunshine is 11h.UV index
In May, the average daily maximum UV index in Niwot is 5. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the average person.Note: In May, the maximum UV index of 5 translates into these guidelines:
Adopt protective measures - It is advised to guard against sun damage. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Frequently asked questions
What are May temperatures in Niwot?
What is the average humidity in May in Niwot?
What is the wettest month in Niwot?
How many days does it rain in May in Niwot?
What is the last month it snows in Niwot?
How many hours of daylight does Niwot have in May?
What time are sunrise and sunset in May in Niwot?
How long on average sun shines in May in Niwot?
How high is the UV index in May in Niwot?
Average temperature in May
Niwot, CO
- Average high temperature in May: 66.4°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is December (39°F).
- Average low temperature in May: 42.6°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 (19.9°F).
Average pressure in May
Niwot, CO
- Average pressure in May: 29.92"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The months with the lowest atmospheric pressure are April and June (29.91"Hg).
Average wind speed in May
Niwot, CO
- Average wind speed in May: 5.9mph
The windiest months (with the highest average wind speed) are March and April (6.6mph).
The calmest months (with the lowest average wind speed) are August and September (5.6mph).
Average humidity in May
Niwot, CO
- Average humidity in May: 54%
The month with the highest relative humidity is February (66%).
The month with the lowest relative humidity is August (42%).
Average rainfall in May
Niwot, CO
- Average rainfall in May: 1.69"
The wettest month (with the highest rainfall) is May (1.69").
The driest month (with the least rainfall) is January (0.35").
Average rainfall days in May
Niwot, CO
- Average rainfall days in May: 15 days
The month with the highest number of rainy days is July (16 days).
The month with the least rainy days is January (3.5 days).
Average snowfall in May
Niwot, CO
- Average snowfall in May: 1.42"
The month with the highest snowfall is November (4.41").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Niwot, CO
- Average snowfall days in May: 1.3 days
The month with the highest number of snowfall days is February (7.7 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in May /
Average sunshine in May
Niwot, CO
- Average daylight in May: 14h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in May: 11h and 0min
The month with the most sunshine is June (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 48min).
Average sunshine days in May
Niwot, CO
- Average sunshine days in May: 13 days
The month with the most sunshine days is January (23.4 days).
The month with the least sunshine days is July (9.3 days).
Average UV index in May
Niwot, CO
- Average UV index in May: 5
The months with the highest UV index are 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
Niwot, CO
- Average cloud cover in May: 26
The months with the most cloud cover are April and May (Cloud cover 26).
The months with the least cloud cover are June and September (Cloud cover 16).
Average visibility in May
Niwot, 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).
Niwot, Colorado, USA
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