January weather forecast
Dillon, CO

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The brown and golden trees near the iconic Dillon reservoir in Colorado
The brown and golden trees near the iconic Dillon reservoir in Colorado

Weather in January

January in Dillon, Colorado experiences regular snowfall with a monthly accumulation of 8.5" (216mm). This chilly month begins the calendar year with white landscapes, offering a serene, frosty spectacle. The relatively lower sunshine hours contribute to a cooler month, making it perfect for various winter activities. However, without proper winter attire, the temperatures may seem harsh. The outdoor enthusiasts should keep in mind the high possibility of frostbite and hypothermia.

Temperature

Dillon's weather, upon January's arrival, documents an average high-temperature of a still subzero cold 23.2°F (-4.9°C), nearly identical to the prior month. January nights report a substantial dip from daytime highs to an average of 1°F (-17.2°C).

Humidity

The average relative humidity in January is 87%.

Rainfall

The month with the least rainfall is January, when the rain falls for 3.4 days and typically collects 1.06" (27mm) of precipitation.

Snowfall

January through December are months with snowfall. In Dillon, in January, snow falls for 15.8 days, with typically accumulated 8.5" (216mm) of snow. In Dillon, during the entire year, snow falls for 149 days and aggregates up to 108.54" (2757mm) of snow.

Daylight

In January, the average length of the day is 9h and 45min.
On the first day of January, sunrise is at 7:24 am and sunset at 4:50 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 5:22 pm MST.

Sunshine

In January, the average sunshine in Dillon is 5.5h.

UV index

In Dillon, the average daily maximum UV index in January is 2. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV rays for the ordinary person.
Note: A maximum high daily UV index of 2 during January translates into the following directions:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. To cut down UV radiation exposure by about half, sport a wide-brim hat. Remember this! The UV radiation of the Sun can be nearly doubled by the reflective properties of snow.
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Frequently asked questions

How cold is it in Dillon in January?

During January, Dillon experiences an average high-temperature of 23.2°F (-4.9°C) and a low-temperature of 1°F (-17.2°C).

What is the average humidity in January in Dillon?

In Dillon, Colorado, the average relative humidity in January is 87%.

What is the driest month in Dillon?

January is the month with the least rainfall in Dillon. Rain falls for 3.4 days and accumulates 1.06" (27mm) of precipitation.

How much does it rain in Dillon in January?

In Dillon, in January, during 3.4 rainfall days, 1.06" (27mm) of precipitation is typically accumulated.

How much does it snow in Dillon in January?

In January, in Dillon, it is snowing for 15.8 days. Throughout January, 8.5" (216mm) of snow is accumulated.

How many hours of daylight does Dillon have in January?

In Dillon, the average day length in January is 9h and 45min.

When is the sunrise / sunset in January in Dillon?

On the first day of January, sunrise is at 7:24 am and sunset at 4:50 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 5:22 pm MST.

How many hours of sunshine does Dillon have in January?

In Dillon, the average sunshine duration in January is 5.5h.

What is the UV index reading in January in Dillon?

The average daily maximum UV index in January in Dillon, Colorado, is 2. A UV Index of 2, and less, symbolizes a low 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 January
Dillon, CO

Average temperature in January - Dillon, CO
  • Average high temperature in January: 23.2°F

The warmest month (with the highest average high temperature) is July (67.1°F).
The month with the lowest average high temperature is December (22.5°F).

  • Average low temperature in January: 1°F

The month with the highest average low temperature is July (39.7°F).
The coldest month (with the lowest average low temperature) is December (0.9°F).

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Average pressure in January
Dillon, CO

Average pressure in January - Dillon, CO
  • Average pressure in January: 30.19"Hg

The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is April (29.93"Hg).

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Average wind speed in January
Dillon, CO

Average wind speed in January - Dillon, CO
  • Average wind speed in January: 6.7mph

The windiest month (with the highest average wind speed) is February (7mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).

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Average humidity in January
Dillon, CO

Average humidity in January - Dillon, CO
  • Average humidity in January: 87%

The month with the highest relative humidity is February (88%).
The month with the lowest relative humidity is June (53%).

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Average rainfall in January
Dillon, CO

Average rainfall in January - Dillon, CO
  • Average rainfall in January: 1.06"

The wettest month (with the highest rainfall) is July (3.39").
The driest month (with the least rainfall) is January (1.06").

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Average rainfall days in January
Dillon, CO

Average rainfall days in January - Dillon, CO
  • Average rainfall days in January: 3.4 days

The month with the highest number of rainy days is July (22.7 days).
The month with the least rainy days is November (2.8 days).

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Average snowfall in January
Dillon, CO

Average snowfall in January - Dillon, CO
  • Average snowfall in January: 8.5"

The month with the highest snowfall is April (18.27").
The month with the least snowfall is July (0.47").

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Average snowfall days in January
Dillon, CO

Average snowfall days in January - Dillon, CO
  • Average snowfall days in January: 15.8 days

The month with the highest number of snowfall days is April (21 days).
The month with the least snowfall days is July (1.8 days).

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Average daylight in January /
Average sunshine in January
Dillon, CO

Average daylight in January / Average sunshine in January - Dillon, CO
  • Average daylight in January: 9h and 4min

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 3min

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 24min).

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Average sunshine days in January
Dillon, CO

Average sunshine days in January - Dillon, CO
  • Average sunshine days in January: 15.6 days

The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is July (5.3 days).

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Average UV index in January
Dillon, CO

Average UV index in January - Dillon, CO
  • Average UV index in January: 2

The months with the highest UV index are July and August (UV index 4).
The months with the lowest UV index are February, November and December (UV index 1).

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Average cloud cover in January
Dillon, CO

Average cloud cover in January - Dillon, CO
  • Average cloud cover in January: 47

The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is June (Cloud cover 19).

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Average visibility in January
Dillon, CO

Average visibility in January - Dillon, 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).

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Dillon, Colorado, USA

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