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

September weather forecast and climate
Seward, AK

Aerial view over the busy Small Boat Harbor in Seward City, Alaska
Aerial view over the busy Small Boat Harbor in Seward City, Alaska
The first month of the autumn, September, is also a fresh month in Seward, Alaska, with average temperature fluctuating between 55.2°F (12.9°C) and 43.9°F (6.6°C).

Temperature

In Seward, the average high-temperature in September marginally drops, from an enjoyable 61.5°F (16.4°C) in August, to a cool 55.2°F (12.9°C). In Seward, the average low-temperature is 43.9°F (6.6°C).

Rainfall

September is the month with the most rainfall. Rain falls for 16.9 days and accumulates 9.9" (250.4mm) of precipitation.

Snowfall

In Seward snow does not fall in June through September.

Ocean temperature

In Seward, the average seawater temperature is 53.4°F (11.9°C).
Note: Swimming in 53.4°F (11.9°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

In September, the average length of the day is 12.8h.

What is the temperature in September in Seward?

The average high-temperature, in September, in Seward, Alaska, is 55.2°F (12.9°C), while the average low-temperature is 43.9°F (6.6°C).

How many days does it rain in September in Seward?

In Seward, Alaska, during September, the rain falls for 16.9 days and regularly aggregates up to 9.9" (250.4mm) of precipitation.

What is the wettest month in Seward?

The month with the most rainfall in Seward, Alaska, is September when the rain falls for 16.9 days and typically aggregates up to 9.9" (250.4mm) of precipitation.

Does it snow in Seward in September?

In Seward, Alaska, in September, it doesn't snow. In October, it regularly snows.

When it does not snow in Seward?

In Seward, Alaska, snow does not fall in June through September.

What is the ocean temperature in September in Seward?

In Seward, the average seawater temperature in September is 53.4°F (11.9°C). Swimming in 53.4°F (11.9°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 September in Seward?

In September, the average length of the day is 12.8h.
Average temperature in September - Seward, AK
  • Average high temperature in September: 55.2°F

The warmest month (with the highest average high temperature) is August (61.5°F).
The month with the lowest average high temperature is January (31.8°F).

  • Average low temperature in September: 43.8°F

The month with the highest average low temperature is July (50.7°F).
The coldest month (with the lowest average low temperature) is January (22.3°F).

Average rainfall in September - Seward, AK
  • Average rainfall in September: 9.9"

The wettest month (with the highest rainfall) is September (9.9").
The driest month (with the lowest rainfall) is June (2.4").

Average rainfall days in September - Seward, AK
  • Average rainfall days in September: 16.9 days

The month with the highest number of rainy days is September (16.9 days).
The month with the lowest number of rainy days is June (11.6 days).

Average snowfall in September - Seward, AK
  • Average snowfall in September: 0"

The month with the highest snowfall is December (15.7").
Months with the lowest snowfall are June, July, August and September (0").

Average snowfall days in September - Seward, AK
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is December (6.7 days).
Months with the lowest number of snowfall days are June, July, August and September (0 days).

Average sea temperature in September - Seward, AK
  • Average sea temperature in September: 53.4°F

The best month for swimming (with the highest average sea temperature) is August (56°F).
The coldest month (with the lowest average sea temperature) is March (39°F).

Average daylight in September - Seward, AK
  • Average daylight in September: 12.8h

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