May weather forecast
Thornton, CO

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Weather in May

The last month of the spring, May, is an agreeable month in Thornton, Colorado, with an average temperature fluctuating between 69.1°F (20.6°C) and 44.4°F (6.9°C).

Temperature

May signifies a subtle uplift in the average high-temperature, adjusting from a mild 60.3°F (15.7°C) in April to a pleasant 69.1°F (20.6°C). The month of May sees a significant daily temperature drop, recording an average low-temperature of 44.4°F (6.9°C).

Humidity

In May, the average relative humidity is 51%.

Rainfall

In Thornton, Colorado, in May, during 6.2 rainfall days, 0.55" (14mm) of precipitation is typically accumulated. Throughout the year, there are 48.3 rainfall days, and 3.19" (81mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall. May is the last month it regularly snows in Thornton. During 0.8 snowfall days, in May, Thornton aggregates 1.26" (32mm) of snow. In Thornton, during the entire year, snow falls for 19.6 days and aggregates up to 8.5" (216mm) of snow.

Daylight

In Thornton, the average length of the day in May is 14h and 24min.
On the first day of the month, sunrise is at 5:58 am and sunset at 7:54 pm. On the last day of May, in Thornton, sunrise is at 5:33 am and sunset at 8:21 pm MDT.

Sunshine

In Thornton, the average sunshine in May is 11.3h.

UV index

In May, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: In May, a regular UV index of 5 translates into these guidelines:
Ensure safety - Recommendations to avert sunburn are presented. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
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Frequently asked questions

What are May temperatures in Thornton?

May temperatures in Thornton vary between a high-temperature of 69.1°F (20.6°C) and a low-temperature of 44.4°F (6.9°C).

What is the average humidity in May in Thornton?

In May, the average relative humidity in Thornton, Colorado, is 51%.

How much does it rain in Thornton in May?

In May, in Thornton, Colorado, the rain falls for 6.2 days. Throughout May, 0.55" (14mm) of precipitation is accumulated.

What is the last month it snows in Thornton?

May is the last month it regularly snows. During 0.8 snowfall days, in May, Thornton aggregates 1.26" (32mm) of snow.

What is the average length of the day in May in Thornton?

The average day length in May in Thornton is 14h and 24min.

When is the sunrise / sunset in May in Thornton?

In May, on the first day of the month, sunrise is at 5:58 am and sunset at 7:54 pm. On the last day of the month, in Thornton, Colorado, sunrise is at 5:33 am and sunset at 8:21 pm MDT.

How many hours of sunshine does Thornton have in May?

In Thornton, the average sunshine duration in May is 11.3h.

What is the UV index reading in May in Thornton?

The average daily maximum UV index in May in Thornton is 5. A UV Index reading of 3 to 5 represents a moderate health threat from unprotected exposure to UV radiation.
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
Thornton, CO

Average temperature in May - Thornton, CO
  • Average high temperature in May: 69.1°F

The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is December (41.2°F).

  • Average low temperature in May: 44.4°F

The month with the highest average low temperature is July (61.7°F).
The coldest month (with the lowest average low temperature) is December (21.9°F).

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Average pressure in May
Thornton, CO

Average pressure in May - Thornton, CO
  • Average pressure in May: 29.92"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are April and June (29.91"Hg).

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Average wind speed in May
Thornton, CO

Average wind speed in May - Thornton, CO
  • Average wind speed in May: 6.3mph

The windiest month (with the highest average wind speed) is April (6.9mph).
The calmest month (with the lowest average wind speed) is December (5.8mph).

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Average humidity in May
Thornton, CO

Average humidity in May - Thornton, CO
  • Average humidity in May: 51%

The month with the highest relative humidity is February (64%).
The month with the lowest relative humidity is August (39%).

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Average rainfall in May
Thornton, CO

Average rainfall in May - Thornton, CO
  • Average rainfall in May: 0.55"

The wettest month (with the highest rainfall) is July (0.59").
The driest months (with the least rainfall) are January and December (0.08").

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Average rainfall days in May
Thornton, CO

Average rainfall days in May - Thornton, CO
  • Average rainfall days in May: 6.2 days

The month with the highest number of rainy days is July (8.2 days).
The month with the least rainy days is February (1.2 days).

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Average snowfall in May
Thornton, CO

Average snowfall in May - Thornton, CO
  • Average snowfall in May: 1.26"

The month with the highest snowfall is October (1.42").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in May
Thornton, CO

Average snowfall days in May - Thornton, CO
  • Average snowfall days in May: 0.8 days

The month with the highest number of snowfall days is February (4.7 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
Thornton, CO

Average daylight in May / Average sunshine in May - Thornton, 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 2min

The months with the most sunshine are June and July (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 42min).

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Average sunshine days in May
Thornton, CO

Average sunshine days in May - Thornton, CO
  • Average sunshine days in May: 21.9 days

The month with the most sunshine days is December (28.5 days).
The month with the least sunshine days is July (19.6 days).

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Average UV index in May
Thornton, CO

Average UV index in May - Thornton, 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).

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Average cloud cover in May
Thornton, CO

Average cloud cover in May - Thornton, CO
  • Average cloud cover in May: 25

The months with the most cloud cover are February, April and May (Cloud cover 25).
The month with the least cloud cover is September (Cloud cover 14).

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Average visibility in May
Thornton, CO

Average visibility in May - Thornton, 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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Thornton, Colorado, USA

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