September weather forecast
Wainwright, AK

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Weather in September

The first month of the autumn, September, is also an icy month in Wainwright, Alaska, with an average temperature fluctuating between 34.7°F (1.5°C) and 39.9°F (4.4°C).

Temperature

Stepping into September, Wainwright records an average high-temperature of an icy 39.9°F (4.4°C), almost consistent with August. Wainwright records a slight downturn in temperature to an average of 34.7°F (1.5°C) during September nights.

Humidity

In September, the average relative humidity is 82%.

Rainfall

In Wainwright, during September, the rain falls for 9.9 days and regularly aggregates up to 0.83" (21mm) of precipitation. Throughout the year, there are 66.3 rainfall days, and 7.99" (203mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through December. In Wainwright, in September, snow falls for 10.1 days, with typically accumulated 1.61" (41mm) of snow. In Wainwright, during the entire year, snow falls for 134.6 days and aggregates up to 19.88" (505mm) of snow.

Daylight

The average length of the day in September is 13h and 20min.
On the first day of September, sunrise is at 6:56 am and sunset at 10:23 pm. On the last day of the month, sunrise is at 8:56 am and sunset at 8:02 pm AKDT.

Sunshine

In Wainwright, the average sunshine in September is 4.1h.

UV index

January through March, September through December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for the average person.
Note: In September, an average UV index of 1 transforms into the following instructions:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Updated: Jul 28, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is it in Wainwright in September?

In September, the average high-temperature and low-temperature are 39.9°F (4.4°C) and 34.7°F (1.5°C) respectively.

What is the average humidity in September?

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

How much does it rain in September?

In Wainwright, during September, the rain falls for 9.9 days and regularly aggregates up to 0.83" (21mm) of precipitation.

How many days does it snow in September?

In Wainwright, Alaska, in September, during 10.1 snowfall days, 1.61" (41mm) of snow is typically accumulated.

What is the average length of the day in September?

The average day length in September is 13h and 20min.

When is the sunrise / sunset in September?

In September, on the first day of the month, sunrise is at 6:56 am and sunset at 10:23 pm. On the last day of the month, sunrise is at 8:56 am and sunset at 8:02 pm AKDT.

How long on average sun shines in September?

The average sunshine duration in September is 4.1h.

When is the lowest UV index?

January through March, September through December, with an average maximum UV index of 1, are months with the lowest UV index.

What is the UV index intensity in September?

In September, the average daily maximum UV index is 1. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Wainwright, AK

Average temperature in September - Wainwright, AK
  • Average high temperature in September: 39.9°F

The warmest month (with the highest average high temperature) is July (49.3°F).
The month with the lowest average high temperature is January (-1.8°F).

  • Average low temperature in September: 34.7°F

The month with the highest average low temperature is July (40.6°F).
The coldest month (with the lowest average low temperature) is January (-10.3°F).

Average pressure in September
Wainwright, AK

Average pressure in September - Wainwright, AK
  • Average pressure in September: 29.84"Hg

The month with the highest atmospheric pressure is March (30.08"Hg).
The month with the lowest atmospheric pressure is September (29.84"Hg).

Average wind speed in September
Wainwright, AK

Average wind speed in September - Wainwright, AK
  • Average wind speed in September: 12.4mph

The windiest month (with the highest average wind speed) is October (14.3mph).
The calmest month (with the lowest average wind speed) is May (10.7mph).

Average humidity in September
Wainwright, AK

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

The months with the highest relative humidity are January, February, March and December (94%).
The month with the lowest relative humidity is June (77%).

Average rainfall in September
Wainwright, AK

Average rainfall in September - Wainwright, AK
  • Average rainfall in September: 0.83"

The wettest month (with the highest rainfall) is August (1.34").
The driest month (with the least rainfall) is January (0.31").

Average rainfall days in September
Wainwright, AK

Average rainfall days in September - Wainwright, AK
  • Average rainfall days in September: 9.9 days

The months with the highest number of rainy days are July and August (13 days).
The month with the least rainy days is December (0.7 days).

Average snowfall in September
Wainwright, AK

Average snowfall in September - Wainwright, AK
  • Average snowfall in September: 1.61"

The month with the highest snowfall is October (3.43").
The month with the least snowfall is July (0.08").

Average snowfall days in September
Wainwright, AK

Average snowfall days in September - Wainwright, AK
  • Average snowfall days in September: 10.1 days

The month with the highest number of snowfall days is December (18.4 days).
The month with the least snowfall days is July (0.9 days).

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

Average daylight in September / Average sunshine in September - Wainwright, AK
  • Average daylight in September: 13h and 2min

The month with the longest days is August (Average daylight: 18h and 24min).
The months with the shortest days are June and December (Average daylight: 0h and 0min).

  • Average sunshine in September: 4h and 1min

The month with the most sunshine is April (Average sunshine: 5h and 36min).
The months with the least sunshine are July and December (Average sunshine: 0h and 24min).

Average sunshine days in September
Wainwright, AK

Average sunshine days in September - Wainwright, AK
  • Average sunshine days in September: 9.7 days

The month with the most sunshine days is June (18.7 days).
The month with the least sunshine days is October (9.6 days).

Average UV index in September
Wainwright, AK

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

The month with the highest UV index is June (UV index 3).
The months with the lowest UV index are January, February, March, September, October, November and December (UV index 1).

Average cloud cover in September
Wainwright, AK

Average cloud cover in September - Wainwright, AK
  • Average cloud cover in September: 71

The month with the most cloud cover is December (Cloud cover 84).
The month with the least cloud cover is June (Cloud cover 47).

Average visibility in September
Wainwright, AK

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

The months with the highest visibility are May, June, July, August and September (6mi).
The months with the lowest visibility are January and March (4mi).

Wainwright, Alaska, USA

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