December weather forecast and climate
Katalla, AK

Weather in December

December, the first month of the winter, in Katalla, is also a subzero cold month, with average temperature fluctuating between 31.5°F (-0.3°C) and 26.2°F (-3.2°C).

Temperature

In December, the average high-temperature is relatively the same as in November - a subzero cold 31.5°F (-0.3°C). In December, in Katalla, the average low-temperature is 26.2°F (-3.2°C).

Humidity

In Katalla, the average relative humidity in December is 81%.

Rainfall

In Katalla, during 14.5 rainfall days, 8.98" (228mm) of precipitation is typically accumulated. Throughout the year, in Katalla, Alaska, there are 191.3 rainfall days, and 72.4" (1839mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. The month with the most snowfall in Katalla is December when snow falls for 12.9 days and typically aggregates up to 17.76" (451mm) of snow.

Daylight

December has the shortest days of the year in Katalla, with an average of 6h of daylight.

Sunshine

December has the least sunshine of the year in Katalla, Alaska, with an average of 2.1h of sunshine.

UV index

November and December, with an average maximum UV index of 1, are months with the lowest UV index in Katalla. A UV Index reading of 2, and below, represents a minimal health hazard from the exposure to the Sun's UV rays for the ordinary person.
Note: In December, the average maximum UV index of 1 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 December in Katalla?

In Katalla, Alaska, the average relative humidity in December is 81%.

How much does it rain in Katalla in December?

In Katalla, Alaska, in December, during 14.5 rainfall days, 8.98" (228mm) of precipitation is typically accumulated.

When does it snow the most in Katalla?

December is the month with the most snowfall. Snow falls for 12.9 days and accumulates 17.76" (451mm) of snow.

How many days does it snow in December in Katalla?

In December, in Katalla, it is snowing for 12.9 days. Throughout December, 17.76" (451mm) of snow is accumulated.

What is the month with the shortest days in Katalla?

The month with the shortest days is December, with an average of 6h of daylight.

How many hours of daylight does Katalla have in December?

The average length of the day in December in Katalla is 6h.

What is the month with the least sunshine in Katalla?

The month with the least sunshine in Katalla, Alaska, is December, with an average of 2.1h of sunshine.

How many hours of sunshine does Katalla have in December?

In Katalla, the average sunshine in December is 2.1h.

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

Months with the lowest UV index in Katalla are November and December, with an average maximum UV index of 1.

How high is the UV index in December in Katalla?

In December, the average daily maximum UV index is 1. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to the Sun's UV rays.

Average temperature in December
Katalla, AK

Average temperature in December - Katalla, AK
  • Average high temperature in December: 31.5°F

The warmest month (with the highest average high temperature) is July (58.6°F).
The month with the lowest average high temperature is January (30.2°F).

  • Average low temperature in December: 26.2°F

The month with the highest average low temperature is August (50°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).

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Average pressure in December
Katalla, AK

Average pressure in December - Katalla, AK
  • Average pressure in December: 29.68"

The month with the highest atmospheric pressure is July (30").
The month with the lowest atmospheric pressure is November (29.65").

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Average wind speed in December
Katalla, AK

Average wind speed in December - Katalla, AK
  • Average wind speed in December: 12mph

The windiest months (with the highest average wind speed) are January and November (12.1mph).
The calmest month (with the lowest average wind speed) is June (5.2mph).

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Average humidity in December
Katalla, AK

Average humidity in December - Katalla, AK
  • Average humidity in December: 81%

The month with the highest relative humidity is August (84%).
The month with the lowest relative humidity is November (75%).

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Average rainfall in December
Katalla, AK

Average rainfall in December - Katalla, AK
  • Average rainfall in December: 8.98"

The wettest month (with the highest rainfall) is October (9.09").
The driest month (with the least rainfall) is June (2.72").

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Average rainfall days in December
Katalla, AK

Average rainfall days in December - Katalla, AK
  • Average rainfall days in December: 14.5 days

The month with the highest number of rainy days is August (21 days).
The month with the least rainy days is February (9.6 days).

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Average snowfall in December
Katalla, AK

Average snowfall in December - Katalla, AK
  • Average snowfall in December: 17.76"

The month with the highest snowfall is December (17.76").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Katalla, AK

Average snowfall days in December - Katalla, AK
  • Average snowfall days in December: 12.9 days

The month with the highest number of snowfall days is December (12.9 days).
Months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in December /
Average sunshine in December
Katalla, AK

Average daylight in December / Average sunshine in December - Katalla, AK
  • Average daylight in December: 6h

The month with the longest days is June (Average daylight: 18.8h).
The month with the shortest days is December (Average daylight: 6h).

  • Average sunshine in December: 2.1h

Months with the most sunshine are May, June and July (Average sunshine: 7.6h).
The month with the least sunshine is December (Average sunshine: 2.1h).

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Average sunshine days in December
Katalla, AK

Average sunshine days in December - Katalla, AK
  • Average sunshine days in December: 9.3 days

The month with the most sunshine days is July (12.1 days).
The month with the least sunshine days is September (8 days).

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Average UV index in December
Katalla, AK

Average UV index in December - Katalla, AK
  • Average UV index in December: 1

The month with the highest UV index is July (UV index 4).
Months with the lowest UV index are November and December (UV index 1).

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Average cloud cover in December
Katalla, AK

Average cloud cover in December - Katalla, AK
  • Average cloud cover in December: 68

The month with the most cloud cover is December (Cloud cover 68).
The month with the least cloud cover is May (Cloud cover 57).

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Average visibility in December
Katalla, AK

Average visibility in December - Katalla, AK
  • Average visibility in December: 5mi

Months with the highest visibility are February, March, April, May, June, July, September, October and November (6mi).
Months with the lowest visibility are January, August and December (5mi).

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