January weather forecast
Castlewood, CO

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Weather in January

January, the same as December, is a wintry winter month in Castlewood, Colorado, with an average temperature fluctuating between 22.1°F (-5.5°C) and 41.2°F (5.1°C).

Temperature

Castlewood notes an average high-temperature of a still icy 41.2°F (5.1°C) in January, hardly diverging from December. Throughout the month of January, the average temperature dips to a subzero cold 22.1°F (-5.5°C) at night.

Humidity

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

Rainfall

In Castlewood, in January, it is raining for 4.4 days, with typically 0.51" (13mm) of accumulated precipitation. In Castlewood, during the entire year, the rain falls for 94.2 days and collects up to 11.97" (304mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December. In Castlewood, during January, snow falls for 6.8 days and regularly aggregates up to 3.62" (92mm) of snow. In Castlewood, during the entire year, snow falls for 46.5 days and aggregates up to 37.2" (945mm) of snow.

Daylight

The average length of the day in January is 9h and 45min.
On the first day of January in Castlewood, sunrise is at 7:20 am and sunset at 4:46 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 5:17 pm MST.

Sunshine

In January, the average sunshine is 7h.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Castlewood. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for average individuals.
Note: The maximum daily UV index of 2 in January interprets into the following recommendations:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Boost your sun resistance with garments that are densely woven yet spacious. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
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Frequently asked questions

How cold does it get in Castlewood in January?

In Castlewood, in January, the average high-temperature is 41.2°F (5.1°C), and the average low-temperature is 22.1°F (-5.5°C).

What is the average humidity in January in Castlewood?

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

How much does it rain in Castlewood in January?

In Castlewood, Colorado, during January, the rain falls for 4.4 days and regularly aggregates up to 0.51" (13mm) of precipitation.

How many days does it snow in January in Castlewood?

In Castlewood, Colorado, during January, snow falls for 6.8 days and regularly aggregates up to 3.62" (92mm) of snow.

What is the average length of the day in January in Castlewood?

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

When are sunrise and sunset in January in Castlewood?

On the first day of January in Castlewood, sunrise is at 7:20 am and sunset at 4:46 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 5:17 pm MST.

How many hours of sunshine does Castlewood have in January?

In Castlewood, Colorado, the average sunshine duration in January is 7h.

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

The months with the lowest UV index in Castlewood are January, February, November and December, with an average maximum UV index of 2.

What is the UV index reading in January in Castlewood?

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

Average temperature in January - Castlewood, CO
  • Average high temperature in January: 41.2°F

The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is December (40.3°F).

  • Average low temperature in January: 22.1°F

The month with the highest average low temperature is July (59.2°F).
The coldest month (with the lowest average low temperature) is December (20.7°F).

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Average pressure in January
Castlewood, CO

Average pressure in January - Castlewood, CO
  • Average pressure in January: 30.13"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are April and June (29.91"Hg).

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Average wind speed in January
Castlewood, CO

Average wind speed in January - Castlewood, CO
  • Average wind speed in January: 6.8mph

The windiest month (with the highest average wind speed) is April (7.8mph).
The calmest months (with the lowest average wind speed) are August and December (6.5mph).

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Average humidity in January
Castlewood, CO

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

The month with the highest relative humidity is February (65%).
The months with the lowest relative humidity are June, August and September (43%).

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Average rainfall in January
Castlewood, CO

Average rainfall in January - Castlewood, CO
  • Average rainfall in January: 0.51"

The wettest month (with the highest rainfall) is May (2.2").
The driest month (with the least rainfall) is September (0.47").

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Average rainfall days in January
Castlewood, CO

Average rainfall days in January - Castlewood, CO
  • Average rainfall days in January: 4.4 days

The month with the highest number of rainy days is May (14.2 days).
The month with the least rainy days is November (3.4 days).

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Average snowfall in January
Castlewood, CO

Average snowfall in January - Castlewood, CO
  • Average snowfall in January: 3.62"

The month with the highest snowfall is April (6.34").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in January
Castlewood, CO

Average snowfall days in January - Castlewood, CO
  • Average snowfall days in January: 6.8 days

The month with the highest number of snowfall days is February (9.4 days).
The months with the least snowfall days are June, July and August (0 days).

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

Average daylight in January / Average sunshine in January - Castlewood, 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: 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 48min).

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Average sunshine days in January
Castlewood, CO

Average sunshine days in January - Castlewood, CO
  • Average sunshine days in January: 22.4 days

The month with the most sunshine days is November (23.2 days).
The month with the least sunshine days is April (12.7 days).

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Average UV index in January
Castlewood, CO

Average UV index in January - Castlewood, 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).

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Average cloud cover in January
Castlewood, CO

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

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

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Average visibility in January
Castlewood, CO

Average visibility in January - Castlewood, 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).

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Castlewood, Colorado, USA

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