October weather forecast and climate
Juneau, AK

Blooming fireweed in Juneau, Alaska with snowy mountain peaks in the distance
Blooming fireweed in Juneau, Alaska with snowy mountain peaks in the distance

Weather in October

October, like September, in Juneau, Alaska, is a wintry autumn month, with average temperature varying between 32.9°F (0.5°C) and 39°F (3.9°C).

Temperature

In Juneau, the average high-temperature in October drops, from a chilly 48.2°F (9°C) in September, to a cold 39°F (3.9°C). In October, in Juneau, the average low-temperature is 32.9°F (0.5°C).

Humidity

The average relative humidity in October is 88%.

Rainfall

The month with the most rainfall in Juneau is October when the rain falls for 20 days and typically aggregates up to 9.88" (251mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall in Juneau. October is the first month it typically snows. Throughout October, in the average 5.8 snowfall days, it receives 9.29" (236mm) of snow. Throughout the year, there are 126.6 snowfall days, and 290.12" (7369mm) of snow is accumulated.

Ocean temperature

In Juneau, the average seawater temperature in October is 46.9°F (8.3°C).
Note: Swimming in 46.9°F (8.3°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

The average length of the day in October is 10.2h.

Sunshine

The average sunshine in October is 3.1h.

UV index

Months with the lowest UV index are January, April, October through December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health hazard from the exposure to the Sun's UV radiation for the ordinary person.
Note: The average daily UV index of 1 in October transform into the following instructions:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always 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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in October in Juneau?

In Juneau, in October, the average high-temperature is 39°F (3.9°C), and the average low-temperature is 32.9°F (0.5°C).

What is the average humidity in October in Juneau?

In October, the average relative humidity is 88%.

How many days does it rain in October in Juneau?

In Juneau, in October, it is raining for 20 days, with typically 9.88" (251mm) of accumulated precipitation.

What is the wettest month in Juneau?

The month with the most rainfall in Juneau is October when the rain falls for 20 days and typically aggregates up to 9.88" (251mm) of precipitation.

When does it start snowing in Juneau?

October is the first month it typically snows in Juneau, Alaska. Throughout October, in the average 5.8 snowfall days, it receives 9.29" (236mm) of snow.

How cold is the water in October in Juneau?

In Juneau, the average seawater temperature in October is 46.9°F (8.3°C). Swimming in 46.9°F (8.3°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

What is the average length of the day in October in Juneau?

The average length of the day in October in Juneau is 10.2h.

How many hours of sunshine does Juneau have in October?

In Juneau, the average sunshine in October is 3.1h.

What is the month with the lowest UV index in Juneau?

Months with the lowest UV index are January, April, October through December, with an average maximum UV index of 1.

What is the UV index intensity in October in Juneau?

In October, the average daily maximum UV index is 1. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to the Sun's UV rays.

Average temperature in October
Juneau, AK

Average temperature in October - Juneau, AK
  • Average high temperature in October: 3.9°C

The warmest month (with the highest average high temperature) is July (13.2°C).
Months with the lowest average high temperature are January and December (-3.5°C).

  • Average low temperature in October: 0.5°C

The month with the highest average low temperature is July (7.3°C).
The coldest month (with the lowest average low temperature) is February (-8.3°C).

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Average pressure in October
Juneau, AK

Average pressure in October - Juneau, AK
  • Average pressure in October: 1011.1mbar

The month with the highest atmospheric pressure is July (1016.8mbar).
The month with the lowest atmospheric pressure is November (1009.1mbar).

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Average wind speed in October
Juneau, AK

Average wind speed in October - Juneau, AK
  • Average wind speed in October: 9km/h

The windiest month (with the highest average wind speed) is January (11.1km/h).
The calmest month (with the lowest average wind speed) is June (5.9km/h).

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Average humidity in October
Juneau, AK

Average humidity in October - Juneau, AK
  • Average humidity in October: 88%

The month with the highest relative humidity is January (92%).
The month with the lowest relative humidity is May (86%).

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Average rainfall in October
Juneau, AK

Average rainfall in October - Juneau, AK
  • Average rainfall in October: 251mm

The wettest month (with the highest rainfall) is October (251mm).
The driest month (with the least rainfall) is May (105mm).

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Average rainfall days in October
Juneau, AK

Average rainfall days in October - Juneau, AK
  • Average rainfall days in October: 20 days

The month with the highest number of rainy days is September (21.9 days).
The month with the least rainy days is February (4.8 days).

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Average snowfall in October
Juneau, AK

Average snowfall in October - Juneau, AK
  • Average snowfall in October: 236mm

The month with the highest snowfall is December (1595mm).
Months with the least snowfall are June, July, August and September (0mm).

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Average snowfall days in October
Juneau, AK

Average snowfall days in October - Juneau, AK
  • Average snowfall days in October: 5.8 days

The month with the highest number of snowfall days is January (21.9 days).
Months with the least snowfall days are June, July, August and September (0 days).

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Average sea temperature in October
Juneau, AK

Average sea temperature in October - Juneau, AK
  • Average sea temperature in October: 8.3°C

The best month for swimming (with the highest average sea temperature) is August (11.9°C).
The coldest month (with the lowest average sea temperature) is March (4.7°C).

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Average daylight in October /
Average sunshine in October
Juneau, AK

Average daylight in October / Average sunshine in October - Juneau, AK
  • Average daylight in October: 10.2h

The month with the longest days is June (Average daylight: 18.2h).
The month with the shortest days is December (Average daylight: 6.5h).

  • Average sunshine in October: 3.1h

The month with the most sunshine is June (Average sunshine: 6.4h).
The month with the least sunshine is November (Average sunshine: 2.6h).

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Average sunshine days in October
Juneau, AK

Average sunshine days in October - Juneau, AK
  • Average sunshine days in October: 7 days

The month with the most sunshine days is May (10 days).
The month with the least sunshine days is November (6.1 days).

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Average UV index in October
Juneau, AK

Average UV index in October - Juneau, AK
  • Average UV index in October: 1

Months with the highest UV index are May and July (UV index 3).
Months with the lowest UV index are January, April, October, November and December (UV index 1).

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Average cloud cover in October
Juneau, AK

Average cloud cover in October - Juneau, AK
  • Average cloud cover in October: 69

Months with the most cloud cover are January and November (Cloud cover 72).
The month with the least cloud cover is May (Cloud cover 61).

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Average visibility in October
Juneau, AK

Average visibility in October - Juneau, AK
  • Average visibility in October: 7km

Months with the highest visibility are February, March, May, June, July, August, September, October and November (7km).
Months with the lowest visibility are January, April and December (6km).

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