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

A minor adjustment in Cordova's average high-temperature is noted with the start of September, touching a fresh 52.5°F (11.4°C) from August's 57.7°F (14.3°C). The nighttime temperature demonstrates a marginal decline, averaging at a chilly 45.3°F (7.4°C) during September.

Humidity

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

Rainfall

In Cordova, during September, the rain falls for 20.9 days and regularly aggregates up to 8.98" (228mm) of precipitation. In Cordova, during the entire year, the rain falls for 191.3 days and collects up to 72.4" (1839mm) of precipitation.

Snowfall

June through September are months without snowfall.

Ocean temperature

In Cordova, the average seawater temperature in September is 53.8°F (12.1°C).
Note: If planning to swim in 53.8°F (12.1°C) under 50°F (10°C), wear a protective suit. Neglecting this advice might cause immediate cold shock and troubled breathing. A splash around 55.4°F (13°C) is not much warmer.

Daylight

The average length of the day in September in Cordova is 12h and 50min.
On the first day of September in Cordova, 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.

Sunshine

The average sunshine in September in Cordova is 5.1h.

UV index

In Cordova, Alaska, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the average person.
Note: The maximum UV index, 3 during September, leads to the following recommendations:
Undertake protective steps - Preventing sun damage is advised. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. 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.
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Frequently asked questions

What are September temperatures in Cordova?

In September, in Cordova, the average high-temperature is 52.5°F (11.4°C), and the average low-temperature is 45.3°F (7.4°C).

What is the average humidity in September in Cordova?

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

How much does it rain in Cordova in September?

In September, in Cordova, the rain falls for 20.9 days. Throughout September, 8.98" (228mm) of precipitation is accumulated.

When it does not snow in Cordova?

June through September are months without snowfall in Cordova.

Does it snow in Cordova in September?

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

How cold is the water in September in Cordova?

In September, the average ocean temperature is 53.8°F (12.1°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.

What is the average length of the day in September in Cordova?

In Cordova, the average day length in September is 12h and 50min.

When are sunrise and sunset in September in Cordova?

In September, on the first day of the month, 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 long on average sun shines in September in Cordova?

The average sunshine duration in September in Cordova, Alaska, is 5.1h.

What is the UV index reading in September in Cordova?

The average daily maximum UV index in September in Cordova, Alaska, is 3. A UV Index of 3 to 5 symbolizes a medium health risk 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).

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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).

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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).

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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%).

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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").

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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).

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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").

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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).

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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).

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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).

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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).

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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).

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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).

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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).

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Cordova, Alaska, USA

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