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

October weather forecast and climate
Petersburg, AK

Colorful buildings, docked ships in Quaint fishing village in Petersburg, Alaska, on Mitkof Island
Colorful buildings, docked ships in Quaint fishing village in Petersburg, Alaska, on Mitkof Island
October, like September, is a frosty autumn month in Petersburg, Alaska, with average temperature ranging between min 37.6°F (3.1°C) and max 47.7°F (8.7°C).

Temperature

In October, the average high-temperature marginally drops, from a moderate 55.9°F (13.3°C) in September, to a frosty 47.7°F (8.7°C). In Petersburg, the average low-temperature is 37.6°F (3.1°C).

Ocean temperature

In Petersburg, Alaska, the average water temperature is 48.7°F (9.3°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

The average length of the day in October in Petersburg is 10.3h.

What is the temperature in October in Petersburg?

In October, in Petersburg, Alaska, the average high-temperature is 47.7°F (8.7°C), and the average low-temperature is 37.6°F (3.1°C).

What is the water temperature in October in Petersburg?

In Petersburg, the average seawater temperature in October is 48.7°F (9.3°C). 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.

How many hours of daylight does Petersburg have in October?

In October, the average length of the day is 10.3h.
Average temperature in October - Petersburg, AK
  • Average high temperature in October: 47.7°F

The warmest month (with the highest average high temperature) is July (63.9°F).
The month with the lowest average high temperature is January (34.9°F).

  • Average low temperature in October: 37.5°F

The month with the highest average low temperature is July (48°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).

Average sea temperature in October - Petersburg, AK
  • Average sea temperature in October: 48.7°F

The best month for swimming (with the highest average sea temperature) is August (54.2°F).
The coldest month (with the lowest average sea temperature) is March (41°F).

Average daylight in October - Petersburg, AK
  • Average daylight in October: 10.3h

The month with the longest days is June (Average daylight: 17.7h).
The month with shortest days is December (Average daylight: 6.9h).