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 start of January marks an average high-temperature of a still subzero cold 22.5°F (-5.3°C), hardly distinguishable from the conditions in December. Jefferson's January nights see a large temperature deviation, with temperatures resting at a low of 0.7°F (-17.4°C).Humidity
In January, the average relative humidity in Jefferson is 87%.Rainfall
In Jefferson, in January, it is raining for 3.1 days, with typically 1.26" (32mm) of accumulated precipitation. Throughout the year, in Jefferson, there are 110.4 rainfall days, and 24.09" (612mm) of precipitation is accumulated.Snowfall
January through December are months with snowfall. In Jefferson, in January, snow falls for 17.1 days, with typically accumulated 10.04" (255mm) of snow. In Jefferson, during the entire year, snow falls for 158 days and aggregates up to 118.82" (3018mm) of snow.Daylight
The average length of the day in January is 9h and 46min.On the first day of January in Jefferson, sunrise is at 7:23 am and sunset at 4:50 pm. On the last day of the month, sunrise is at 7:11 am and sunset at 5:21 pm MST.
Sunshine
In Jefferson, the average sunshine in January is 5.3h.UV index
In Jefferson, the average daily maximum UV index in January is 2. A UV Index of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: In January, the maximum UV index of 2 transforms into these recommendations:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
Frequently asked questions
How cold is January in Jefferson?
What is the average humidity in January in Jefferson?
How many days does it rain in January in Jefferson?
How much does it snow in Jefferson in January?
What is the average length of the day in January in Jefferson?
When are sunrise and sunset in January in Jefferson?
How many hours of sunshine does Jefferson have in January?
How high is the UV index in January in Jefferson?
Average temperature in January
Jefferson, CO
- Average high temperature in January: 22.5°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 January: 0.7°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 January
Jefferson, CO
- Average pressure in January: 30.19"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 January
Jefferson, CO
- Average wind speed in January: 6.6mph
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 January
Jefferson, CO
- Average humidity in January: 87%
The month with the highest relative humidity is February (89%).
The month with the lowest relative humidity is June (54%).
Average rainfall in January
Jefferson, CO
- Average rainfall in January: 1.26"
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 January
Jefferson, CO
- Average rainfall days in January: 3.1 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 January
Jefferson, CO
- Average snowfall in January: 10.04"
The month with the highest snowfall is May (19.69").
The month with the least snowfall is July (0.24").
Average snowfall days in January
Jefferson, CO
- Average snowfall days in January: 17.1 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 January /
Average sunshine in January
Jefferson, CO
- Average daylight in January: 9h and 5min
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 January: 5h and 2min
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 January
Jefferson, CO
- Average sunshine days in January: 14.6 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 January
Jefferson, CO
- Average UV index in January: 2
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 January
Jefferson, CO
- Average cloud cover in January: 49
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 January
Jefferson, CO
- Average visibility in January: 4mi
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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