Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average snowfall in January
- Average snowfall days in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
Weather in January
Temperature
The onset of January notes an average high-temperature of a still cold 42.4°F (5.8°C), subtly shifted from December's 41.2°F (5.1°C). During January, the nighttime temperature in Thornton, Colorado, averages to a freezing cold 23.2°F (-4.9°C).Humidity
In Thornton, the average relative humidity in January is 62%.Rainfall
January and December are months with the least rain in Thornton when the rain falls for 2.3 days and typically aggregates up to 0.08" (2mm) of rain.Snowfall
January through May, October through December are months with snowfall in Thornton. In Thornton, during January, snow falls for 3.2 days and regularly aggregates up to 0.71" (18mm) of snow. Throughout the year, there are 19.6 snowfall days, and 8.5" (216mm) of snow is accumulated.Daylight
In Thornton, the average length of the day in January is 9h and 44min.On the first day of the month, sunrise is at 7:21 am and sunset at 4:45 pm. On the last day of January, in Thornton, sunrise is at 7:08 am and sunset at 5:17 pm MST.
Sunshine
In January, the average sunshine in Thornton is 7h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The maximum daily UV index, 2 in January, converts into the following recommendations:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Frequently asked questions
How cold is it in Thornton in January?
What is the average humidity in January in Thornton?
What is the driest month in Thornton?
How much does it rain in Thornton in January?
How much does it snow in Thornton in January?
How many hours of daylight does Thornton have in January?
When are sunrise and sunset in January in Thornton?
How many hours of sunshine does Thornton have in January?
When is the lowest UV index in Thornton?
What is the UV index reading in January in Thornton?
Average temperature in January
Thornton, CO
- Average high temperature in January: 42.4°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 January: 23.2°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).
Average pressure in January
Thornton, CO
- Average pressure in January: 30.14"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).
Average wind speed in January
Thornton, CO
- Average wind speed in January: 6.1mph
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).
Average humidity in January
Thornton, CO
- Average humidity in January: 62%
The month with the highest relative humidity is February (64%).
The month with the lowest relative humidity is August (39%).
Average rainfall in January
Thornton, CO
- Average rainfall in January: 0.08"
The wettest month (with the highest rainfall) is July (0.59").
The driest months (with the least rainfall) are January and December (0.08").
Average rainfall days in January
Thornton, CO
- Average rainfall days in January: 2.3 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).
Average snowfall in January
Thornton, CO
- Average snowfall in January: 0.71"
The month with the highest snowfall is October (1.42").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Thornton, CO
- Average snowfall days in January: 3.2 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).
Average daylight in January /
Average sunshine in January
Thornton, CO
- Average daylight in January: 9h and 4min
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 January: 7h and 0min
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).
Average sunshine days in January
Thornton, CO
- Average sunshine days in January: 27.4 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).
Average UV index in January
Thornton, CO
- Average UV index in January: 2
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 January
Thornton, CO
- Average cloud cover in January: 21
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).
Average visibility in January
Thornton, CO
- Average visibility in January: 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).
Thornton, Colorado, USA
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