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

September weather forecast and climate
Deadhorse, AK

September, the first month of the autumn, in Deadhorse, is also a wintry month, with average temperature ranging between max 37.9°F (3.3°C) and min 27.7°F (-2.4°C).

Temperature

In Deadhorse, Alaska, the average high-temperature in September drops, from a cool 50°F (10°C) in August, to a wintry 37.9°F (3.3°C). The average low-temperature, in Deadhorse, is 27.7°F (-2.4°C).

Rainfall

In Deadhorse, Alaska, it is raining for 9 days, with typically 0.6" (16.5mm) of accumulated precipitation. Throughout the year, there are 80 rainfall days, and 4" (102.1mm) of precipitation is accumulated.

Snowfall

January through June, August through December are months with snowfall in Deadhorse. In Deadhorse, 3.1" (79mm) of snow is typically accumulated. In Deadhorse, during the entire year, snow aggregates up to 23.7" (602.8mm).

Ocean temperature

August and September, with an average ocean temperature of 35.6°F (2°C), are months with the warmest seawater.
Note: For swimming, this is considered extremely cold, dangerous, and life-threatening. Unless suitably protected with insulated waterproof clothing, hypothermia quickly occurs.

Daylight

In September, the average length of the day in Deadhorse is 13.3h.

Sunshine

In Deadhorse, Alaska, the average sunshine is 5h.

UV index

In Deadhorse, the average daily maximum UV index is 1. A UV Index estimate of 2, and below, represents a minimal health vulnerability from the exposure to the Sun's UV radiation for the ordinary person.
Note: In September, the average maximum UV index of 1 translate into the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the temperature in September in Deadhorse?

In September, in Deadhorse, the average high-temperature is 37.9°F (3.3°C), and the average low-temperature is 27.7°F (-2.4°C).

How many days does it rain in September in Deadhorse?

In Deadhorse, in September, it is raining for 9 days, with typically 0.6" (16.5mm) of accumulated precipitation.

How much does it snow in Deadhorse in September?

In Deadhorse, Alaska, in September, 3.1" (79mm) of snow is typically accumulated.

When is the ocean warmest in Deadhorse?

Months with the warmest seawater in Deadhorse are August and September, with an average ocean temperature of 35.6°F (2°C).

What is the water temperature in September in Deadhorse?

In Deadhorse, Alaska, the average seawater temperature in September is 35.6°F (2°C). For swimming, this is considered very dangerous and immediately life-threatening. Total loss of breathing control instantly occurs, and clear thinking becomes almost impossible. A specialized swimsuit is obligatory to minimize thermal loss.

How many hours of daylight does Deadhorse have in September?

The average length of the day in September in Deadhorse, Alaska, is 13.3h.

How many hours of sunshine does Deadhorse have in September?

In Deadhorse, the average sunshine in September is 5h.

What is the UV index intensity in September in Deadhorse?

The average daily maximum UV index in September in Deadhorse is 1. A UV Index estimate of 2, and below, represents a minimal health vulnerability from the exposure to the Sun's UV rays.
Average temperature in September - Deadhorse, AK
  • Average high temperature in September: 38°F

The warmest month (with the highest average high temperature) is July (54°F).
The month with the lowest average high temperature is February (-13°F).

  • Average low temperature in September: 27.7°F

The month with the highest average low temperature is July (38.3°F).
The coldest month (with the lowest average low temperature) is February (-23.6°F).

Average rainfall in September - Deadhorse, AK
  • Average rainfall in September: 0.7"

The wettest month (with the highest rainfall) is August (1").
Driest months (with the lowest rainfall) are February, March, April, May and November (0.1").

Average rainfall days in September - Deadhorse, AK
  • Average rainfall days in September: 9 days

The month with the highest number of rainy days is August (11 days).
Months with the lowest number of rainy days are January, February, March, April and May (4 days).

Average snowfall in September - Deadhorse, AK
  • Average snowfall in September: 3.1"

The month with the highest snowfall is October (8.1").
The month with the lowest snowfall is July (0").

Average sea temperature in September - Deadhorse, AK
  • Average sea temperature in September: 36°F

Best months for swimming (with the highest average sea temperature) are August and September (36°F).
Coldest months (with the lowest average sea temperature) are January, February, March, April, May, November and December (28°F).

Average daylight in September / Average sunshine in September - Deadhorse, AK
  • Average daylight in September: 13.3h

The month with the longest days is June (Average daylight: 24h).
The month with shortest days is December (Average daylight: 0h).

  • Average sunshine in September: 5h

Months with most sunshine are May and June (Average sunshine: 11h).
Months with least sunshine are January and December (Average sunshine: 0).

Average UV index in September - Deadhorse, AK
  • Average UV index in September: 1

Months with the highest UV index are June and July (UV index 4).
Months with the lowest UV index are January, February, October, November and December (UV index 0).