Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average sea temperature in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
As August transitions into September, Deadhorse sees a gentle drop in the average high-temperature, transitioning from a chilly 46.9°F (8.3°C) to a wintry 39.2°F (4°C). During September, Deadhorse's nighttime temperatures demonstrate a subtle cooling from daytime highs, stabilizing at a still icy 33.1°F (0.6°C).Humidity
The average relative humidity in September is 84%.Rainfall
In Deadhorse, during September, the rain falls for 7 days and regularly aggregates up to 0.31" (8mm) of precipitation. In Deadhorse, during the entire year, the rain falls for 52.1 days and collects up to 3.62" (92mm) of precipitation.Snowfall
January through June, August through December are months with snowfall. In September, it is snowing for 8.5 days. Throughout September, 0.87" (22mm) of snow is accumulated. Throughout the year, there are 122.8 snowfall days, and 10.24" (260mm) of snow is accumulated.Ocean temperature
August and September, with an average ocean temperature of 35.6°F (2°C), are months with the warmest seawater.Note: Within swimming, this is perceived as extraordinarily cold, dangerous, and potentially lethal. If not properly protected by insulated waterproof attire, hypothermia ensues quickly.
Daylight
The average length of the day in September is 13h and 18min.On the first day of September, sunrise is at 6:12 am and sunset at 9:34 pm. On the last day of the month, sunrise is at 8:09 am and sunset at 7:17 pm AKDT.
Sunshine
In Deadhorse, the average sunshine in September is 4.3h.UV index
February through April, August through December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 1 in September converts into the following recommendations:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it cold in Deadhorse during September?
What is the average humidity in September?
How much does it rain in September?
How many days does it snow in September?
What months are the ocean warmest?
How cold is the water in September?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
When is the lowest UV index?
What is the UV index intensity in September?
Average temperature in September
Deadhorse, AK
- Average high temperature in September: 39.2°F
The warmest month (with the highest average high temperature) is July (51.4°F).
The month with the lowest average high temperature is January (-7.1°F).
- Average low temperature in September: 33.1°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 (-16.6°F).
Average pressure in September
Deadhorse, AK
- Average pressure in September: 29.84"Hg
The month with the highest atmospheric pressure is March (30.07"Hg).
The month with the lowest atmospheric pressure is September (29.84"Hg).
Average wind speed in September
Deadhorse, AK
- Average wind speed in September: 11.2mph
The windiest month (with the highest average wind speed) is October (11.9mph).
The calmest month (with the lowest average wind speed) is May (9.8mph).
Average humidity in September
Deadhorse, AK
- Average humidity in September: 84%
The months with the highest relative humidity are January, February, March and December (93%).
The month with the lowest relative humidity is July (76%).
Average rainfall in September
Deadhorse, AK
- Average rainfall in September: 0.31"
The wettest month (with the highest rainfall) is August (0.83").
The driest months (with the least rainfall) are January, April and December (0.16").
Average rainfall days in September
Deadhorse, AK
- Average rainfall days in September: 7 days
The month with the highest number of rainy days is August (11.8 days).
The month with the least rainy days is February (0.7 days).
Average snowfall in September
Deadhorse, AK
- Average snowfall in September: 0.87"
The month with the highest snowfall is November (1.81").
The month with the least snowfall is July (0").
Average snowfall days in September
Deadhorse, AK
- Average snowfall days in September: 8.5 days
The month with the highest number of snowfall days is November (17.5 days).
The month with the least snowfall days is July (0.2 days).
Average sea temperature in September
Deadhorse, AK
- Average sea temperature in September: 36°F
The best months for swimming (with the highest average sea temperature) are August and September (36°F).
The 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: 13h and 2min
The month with the longest days is August (Average daylight: 18h and 12min).
The months with the shortest days are June and December (Average daylight: 0h and 0min).
- Average sunshine in September: 4h and 2min
The month with the most sunshine is August (Average sunshine: 6h and 36min).
The month with the least sunshine is December (Average sunshine: 0h and 24min).
Average sunshine days in September
Deadhorse, AK
- Average sunshine days in September: 14 days
The month with the most sunshine days is June (21 days).
The month with the least sunshine days is September (14 days).
Average UV index in September
Deadhorse, AK
- Average UV index in September: 1
The months with the highest UV index are June and July (UV index 3).
The months with the lowest UV index are February, March, April, August, September, October, November and December (UV index 1).
Average cloud cover in September
Deadhorse, AK
- Average cloud cover in September: 71
The months with the most cloud cover are November and December (Cloud cover 76).
The month with the least cloud cover is June (Cloud cover 45).
Average visibility in September
Deadhorse, AK
- Average visibility in September: 6mi
The months with the highest visibility are June, July, August, September and October (6mi).
The months with the lowest visibility are January, March and December (4mi).
Deadhorse, Alaska, USA
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