Juneau
Alaska, USA
Long-term weather forecast
Long-term weather forecast

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
October, the same as September, is another cold autumn month in Juneau, Alaska, with average temperature fluctuating between 39°F (3.9°C) and 37.8°F (3.2°C).

Temperature

In October, the average high-temperature drops, from a frosty 48.2°F (9°C) in September, to a wintry 39°F (3.9°C). In Juneau, the average low-temperature is 37.8°F (3.2°C).

Humidity

In Juneau, the average relative humidity in October is 88%.

Rainfall

The month with the most rainfall in Juneau, Alaska, 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. October is the first month it typically snows in Juneau. Throughout October, in the average 5.8 snowfall days, it receives 9.29" (236mm) of snow. In Juneau, during the entire year, snow falls for 126.6 days, and aggregates up to 290.12" (7369mm) of snow.

Ocean temperature

In Juneau, Alaska, the average water temperature is 46.9°F (8.3°C).
Note: At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

Daylight

In Juneau, Alaska, the average length of the day is 10.2h.

Sunshine

The average sunshine in October is 3.1h.

UV index

January, April, October through December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 1 in October transform into the following instructions:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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.

What is the temperature in October in Juneau?

The average high-temperature, in October, in Juneau, Alaska, is 39°F (3.9°C), while the average low-temperature is 37.8°F (3.2°C).

What is the average humidity in October in Juneau?

In October, the average relative humidity in Juneau, Alaska, is 88%.

How much does it rain in Juneau in October?

In Juneau, in October, during 20 rainfall days, 9.88" (251mm) of precipitation is typically accumulated.

What is the wettest month in Juneau?

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

When does it start to snow 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.

What is the water temperature 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.

How many hours of daylight does Juneau have in October?

In Juneau, Alaska, the average length of the day in October is 10.2h.

How many hours of sunshine does Juneau have in October?

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

When is the lowest UV index in Juneau?

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

What is the UV index intensity in October in Juneau?

The average daily maximum UV index in October is 1. A UV Index value of 2, and less, symbolizes a low health threat from the exposure to the Sun's UV rays.
Average temperature in October - Juneau, AK
  • Average high temperature in October: 39°F

The warmest month (with the highest average high temperature) is July (55.8°F).
Months with the lowest average high temperature are January and December (25.7°F).

  • Average low temperature in October: 37.8°F

The month with the highest average low temperature is July (50°F).
The coldest month (with the lowest average low temperature) is January (23.7°F).

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%).

Average rainfall in October - Juneau, AK
  • Average rainfall in October: 9.88"

The wettest month (with the highest rainfall) is October (9.88").
The driest month (with the lowest rainfall) is May (4.13").

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 lowest number of rainy days is February (4.8 days).

Average snowfall in October - Juneau, AK
  • Average snowfall in October: 9.29"

The month with the highest snowfall is December (62.8").
Months with the lowest snowfall are June, July, August and September (0").

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 lowest number of snowfall days are June, July, August and September (0 days).

Average sea temperature in October - Juneau, AK
  • Average sea temperature in October: 47°F

The best month for swimming (with the highest average sea temperature) is August (53.5°F).
The coldest month (with the lowest average sea temperature) is March (40.3°F).

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 shortest days is December (Average daylight: 6.5h).

  • Average sunshine in October: 3.1h

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

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).