September weather forecast
Cordova, AK

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A boat-laden busy bay of Cordova, Alaska, with the view of forests and snow-peaked mountains
A boat-laden busy bay of Cordova, Alaska, with the view of forests and snow-peaked mountains

Weather in September

September begins with a gradual fall in temperature, indicating the onset of the autumn season in Cordova. Along with an observable decrease in daylight duration, it signifies that the days have started becoming shorter. Importantly, the highest average rainfall of 8.98" (228mm) is seen this month, marking it as the rainiest month of the year. Moving towards October, expect another drop in temperatures, rainfall, and daylight duration. All in all, September marks a noticeable shift from the warm summer to the cooler and more unpredictable fall.

Temperature

Cordova experiences a recorded average high-temperature of a fresh 52.5°F (11.4°C) in September, closely aligned with August's 57.7°F (14.3°C). Cordova maintains a consistent average nighttime low-temperature of 45.3°F (7.4°C) throughout September.

Humidity

In September, the average relative humidity is 82%.

Rainfall

In Cordova, in September, it is raining for 20.9 days, with typically 8.98" (228mm) of accumulated precipitation. In Cordova, during the entire year, the rain falls for 191.3 days and collects up to 72.4" (1839mm) of precipitation.

Snowfall

In Cordova, snow does not fall in June through September.

Ocean temperature

In Cordova, the average seawater temperature in September is 53.8°F (12.1°C).
Note: Dipping in 53.8°F (12.1°C) at temperatures less than 50°F (10°C) without proper gear can lead to pronounced cold shock and breathing difficulties.

Daylight

In September, the average length of the day is 12h and 50min.
On the first day of the month, sunrise is at 6:39 am and sunset at 8:46 pm. On the last day of September, sunrise is at 7:48 am and sunset at 7:16 pm AKDT.

Sunshine

In Cordova, the average sunshine in September is 5.1h.

UV index

The average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: The daily maximum UV index of 3 in September interprets into the following advice:
Take measures. Individuals with light skin might experience burns in under 30 minutes. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Experience reduced UV exposure by about half when donning a wide-brim hat.

Frequently asked questions

What are the temperatures in September?

September temperatures vary between a high-temperature of 52.5°F (11.4°C) and a low-temperature of 45.3°F (7.4°C).

What is the average humidity in September?

In Cordova, the average relative humidity in September is 82%.

How much does it rain in September?

In Cordova, in September, during 20.9 rainfall days, 8.98" (228mm) of precipitation is typically accumulated.

When it does not snow?

June through September are months without snowfall in Cordova.

Does it snow in September?

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

How cold is the water in September?

In Cordova, in September, the average water temperature is 53.8°F (12.1°C). Swimming in 53.8°F (12.1°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 Cordova?

The average day length in September is 12h and 50min.

What time are sunrise and sunset in September?

On the first day of September, sunrise is at 6:39 am and sunset at 8:46 pm. On the last day of the month, sunrise is at 7:48 am and sunset at 7:16 pm AKDT.

How many hours of sunshine does Cordova have in September?

The average sunshine duration in September is 5.1h.

What is the UV index intensity in September?

The average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a medium hazard to health from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Cordova, AK

Average temperature in September - Cordova, AK
  • Average high temperature in September: 52.5°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 September: 45.3°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).

Average pressure in September
Cordova, AK

Average pressure in September - Cordova, AK
  • Average pressure in September: 29.78"Hg

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

Average wind speed in September
Cordova, AK

Average wind speed in September - Cordova, AK
  • Average wind speed in September: 8mph

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).

Average humidity in September
Cordova, AK

Average humidity in September - Cordova, AK
  • Average humidity in September: 82%

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

Average rainfall in September
Cordova, AK

Average rainfall in September - Cordova, AK
  • Average rainfall in September: 8.98"

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

Average rainfall days in September
Cordova, AK

Average rainfall days in September - Cordova, AK
  • Average rainfall days in September: 20.9 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).

Average snowfall in September
Cordova, AK

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

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

Average snowfall days in September
Cordova, AK

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

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

Average sea temperature in September
Cordova, AK

Average sea temperature in September - Cordova, AK
  • Average sea temperature in September: 53.7°F

The best month for swimming (with the highest average sea temperature) is July (57.3°F).
The coldest month (with the lowest average sea temperature) is March (39.6°F).

Average daylight in September /
Average sunshine in September
Cordova, AK

Average daylight in September / Average sunshine in September - Cordova, AK
  • Average daylight in September: 12h and 5min

The month with the longest days is June (Average daylight: 18h and 54min).
The month with the shortest days is December (Average daylight: 5h and 54min).

  • Average sunshine in September: 5h and 1min

The months with the most sunshine are May, June and July (Average sunshine: 7h and 36min).
The month with the least sunshine is December (Average sunshine: 2h and 6min).

Average sunshine days in September
Cordova, AK

Average sunshine days in September - Cordova, AK
  • Average sunshine days in September: 8 days

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

Average UV index in September
Cordova, AK

Average UV index in September - Cordova, AK
  • Average UV index in September: 3

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

Average cloud cover in September
Cordova, AK

Average cloud cover in September - Cordova, AK
  • Average cloud cover in September: 63

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

Average visibility in September
Cordova, AK

Average visibility in September - Cordova, AK
  • Average visibility in September: 6mi

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

Cordova, Alaska, USA

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