January weather forecast and climate
Louisville, CO

Weather in January

January, the same as December, is another cold winter month in Louisville, Colorado, with average temperature fluctuating between 40.3°F (4.6°C) and 21.6°F (-5.8°C).

Temperature

In January, the average high-temperature is practically the same as in December - a still cold 40.3°F (4.6°C). In Louisville, Colorado,, the average low-temperature is 21.6°F (-5.8°C).

Humidity

In January, the average relative humidity in Louisville is 64%.

Rainfall

January is the month with the least rainfall. Rain falls for 4.8 days and accumulates 0.16" (4mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall in Louisville. In Louisville, during 5.8 snowfall days, 1.1" (28mm) of snow is typically accumulated. Throughout the year, in Louisville, there are 36.7 snowfall days, and 13.98" (355mm) of snow is accumulated.

Daylight

In January, the average length of the day in Louisville, Colorado, is 9.7h.

Sunshine

The average sunshine is 7h.

UV index

Months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: In January, the average maximum UV index of 2 translate into the following recommendations:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the average humidity in January in Louisville?

The average relative humidity in January in Louisville is 64%.

What is the driest month in Louisville?

January is the month with the least rainfall. Rain falls for 4.8 days and accumulates 0.16" (4mm) of precipitation.

How many days does it rain in January in Louisville?

In January, in Louisville, Colorado, the rain falls for 4.8 days. Throughout January, 0.16" (4mm) of precipitation is accumulated.

How much does it snow in Louisville in January?

In Louisville, in January, during 5.8 snowfall days, 1.1" (28mm) of snow is typically accumulated.

How many hours of daylight does Louisville have in January?

The average length of the day in January is 9.7h.

How long on average sun shines in January in Louisville?

In Louisville, the average sunshine in January is 7h.

What are the months with the lowest UV index in Louisville?

Months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.

What is the UV index intensity in January in Louisville?

In Louisville, Colorado, the average daily maximum UV index in January is 2. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to the Sun's UV rays.

Average temperature in January
Louisville, CO

Average temperature in January - Louisville, CO
  • Average high temperature in January: 40.3°F

The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is December (39.4°F).

  • Average low temperature in January: 21.6°F

The month with the highest average low temperature is July (59°F).
The coldest months (with the lowest average low temperature) are February and December (20.7°F).

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Average pressure in January
Louisville, CO

Average pressure in January - Louisville, CO
  • Average pressure in January: 30.14"

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

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Average wind speed in January
Louisville, CO

Average wind speed in January - Louisville, CO
  • Average wind speed in January: 6.3mph

The windiest months (with the highest average wind speed) are March and April (6.5mph).
The calmest month (with the lowest average wind speed) is September (5.6mph).

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Average humidity in January
Louisville, CO

Average humidity in January - Louisville, CO
  • Average humidity in January: 64%

The month with the highest relative humidity is February (67%).
The month with the lowest relative humidity is August (41%).

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Average rainfall in January
Louisville, CO

Average rainfall in January - Louisville, CO
  • Average rainfall in January: 0.16"

The wettest months (with the highest rainfall) are May and July (0.87").
The driest month (with the least rainfall) is January (0.16").

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Average rainfall days in January
Louisville, CO

Average rainfall days in January - Louisville, CO
  • Average rainfall days in January: 4.8 days

The month with the highest number of rainy days is May (14.4 days).
The month with the least rainy days is November (3.5 days).

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Average snowfall in January
Louisville, CO

Average snowfall in January - Louisville, CO
  • Average snowfall in January: 1.1"

The month with the highest snowfall is February (2.68").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in January
Louisville, CO

Average snowfall days in January - Louisville, CO
  • Average snowfall days in January: 5.8 days

The month with the highest number of snowfall days is February (8.4 days).
Months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in January / Average sunshine in January - Louisville, CO
  • Average daylight in January: 9.7h

The month with the longest days is June (Average daylight: 15h).
The month with the shortest days is December (Average daylight: 9.4h).

  • Average sunshine in January: 7h

Months with the most sunshine are June, July and August (Average sunshine: 11.8h).
The month with the least sunshine is February (Average sunshine: 6.7h).

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Average sunshine days in January
Louisville, CO

Average sunshine days in January - Louisville, CO
  • Average sunshine days in January: 23.6 days

The month with the most sunshine days is November (23.7 days).
The month with the least sunshine days is July (10 days).

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Average UV index in January
Louisville, CO

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

Months with the highest UV index are July and August (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in January
Louisville, CO

Average cloud cover in January - Louisville, CO
  • Average cloud cover in January: 21

Months with the most cloud cover are April and May (Cloud cover 26).
The month with the least cloud cover is September (Cloud cover 15).

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Average visibility in January
Louisville, CO

Average visibility in January - Louisville, CO
  • Average visibility in January: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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