September weather forecast
Old Tyonek, AK

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Weather in September

September, the first month of the autumn in Old Tyonek, is still a cool month, with an average temperature varying between 52°F (11.1°C) and 46°F (7.8°C).

Temperature

September brings a minor shift in the average high-temperature, adjusting from a mild 57.6°F (14.2°C) in August to a cool 52°F (11.1°C). The September average low temperature, marginally lower than the daytime high, records at a chilly 46°F (7.8°C).

Humidity

In September, the average relative humidity is 78%.

Rainfall

In September, the rain falls for 15.6 days. Throughout September, 2.36" (60mm) of precipitation is accumulated. Throughout the year, in Old Tyonek, there are 128.2 rainfall days, and 20.08" (510mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall in Old Tyonek.

Daylight

In September, the average length of the day in Old Tyonek is 12h and 51min.
On the first day of the month, sunrise is at 6:59 am and sunset at 9:09 pm. On the last day of September, sunrise is at 8:11 am and sunset at 7:38 pm AKDT.

Sunshine

In September, the average sunshine in Old Tyonek is 6.6h.

UV index

The average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the average person.
Note: A maximum high UV index of 3 in September translates into the following recommendations:
Make use of precautions - Shielding skin and eyes from injury is a requirement. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
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Frequently asked questions

What is the average September temperature in Old Tyonek?

September temperatures in Old Tyonek, Alaska, vary between a high-temperature of 52°F (11.1°C) and a low-temperature of 46°F (7.8°C).

What is the average humidity in September in Old Tyonek?

In September, the average relative humidity in Old Tyonek is 78%.

How many days does it rain in September in Old Tyonek?

In September, the rain falls for 15.6 days. Throughout September, 2.36" (60mm) of precipitation is accumulated.

When it does not snow in Old Tyonek?

In Old Tyonek, snow does not fall in June through September.

Does it snow in Old Tyonek in September?

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

What is the average length of the day in September in Old Tyonek?

In September, the average day length in Old Tyonek is 12h and 51min.

When are sunrise and sunset in September in Old Tyonek?

In September, on the first day of the month, sunrise is at 6:59 am and sunset at 9:09 pm. On the last day of the month, in Old Tyonek, Alaska, sunrise is at 8:11 am and sunset at 7:38 pm AKDT.

How long on average sun shines in September in Old Tyonek?

The average sunshine duration in September in Old Tyonek, Alaska, is 6.6h.

What is the UV index reading in September in Old Tyonek?

In September, the average daily maximum UV index in Old Tyonek, Alaska, is 3. A UV Index estimate of 3 to 5 represents a moderate health threat from unsafe exposure to Sun's UV rays.
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
Old Tyonek, AK

Average temperature in September - Old Tyonek, AK
  • Average high temperature in September: 52°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 (25.2°F).

  • Average low temperature in September: 46°F

The month with the highest average low temperature is July (51.1°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).

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Average pressure in September
Old Tyonek, AK

Average pressure in September - Old Tyonek, AK
  • Average pressure in September: 29.73"Hg

The month with the highest atmospheric pressure is July (29.96"Hg).
The months with the lowest atmospheric pressure are November and December (29.65"Hg).

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Average wind speed in September
Old Tyonek, AK

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

The windiest month (with the highest average wind speed) is December (11mph).
The calmest month (with the lowest average wind speed) is May (7.5mph).

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Average humidity in September
Old Tyonek, AK

Average humidity in September - Old Tyonek, AK
  • Average humidity in September: 78%

The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is May (72%).

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Average rainfall in September
Old Tyonek, AK

Average rainfall in September - Old Tyonek, AK
  • Average rainfall in September: 2.36"

The wettest month (with the highest rainfall) is October (2.91").
The driest month (with the least rainfall) is June (0.71").

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Average rainfall days in September
Old Tyonek, AK

Average rainfall days in September - Old Tyonek, AK
  • Average rainfall days in September: 15.6 days

The month with the highest number of rainy days is September (15.6 days).
The month with the least rainy days is February (5.9 days).

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Average snowfall in September
Old Tyonek, AK

Average snowfall in September - Old Tyonek, AK
  • Average snowfall in September: 0"

The month with the highest snowfall is December (7.91").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Old Tyonek, AK

Average snowfall days in September - Old Tyonek, AK
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is December (11.9 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Old Tyonek, AK

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

The month with the longest days is June (Average daylight: 19h and 6min).
The month with the shortest days is December (Average daylight: 5h and 42min).

  • Average sunshine in September: 6h and 4min

The month with the most sunshine is June (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 2h and 54min).

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Average sunshine days in September
Old Tyonek, AK

Average sunshine days in September - Old Tyonek, AK
  • Average sunshine days in September: 13.1 days

The month with the most sunshine days is June (18.7 days).
The month with the least sunshine days is September (13.1 days).

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Average UV index in September
Old Tyonek, AK

Average UV index in September - Old Tyonek, AK
  • Average UV index in September: 3

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

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Average cloud cover in September
Old Tyonek, AK

Average cloud cover in September - Old Tyonek, AK
  • Average cloud cover in September: 49

The month with the most cloud cover is December (Cloud cover 57).
The month with the least cloud cover is June (Cloud cover 40).

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Average visibility in September
Old Tyonek, AK

Average visibility in September - Old Tyonek, AK
  • Average visibility in September: 6mi

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

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Old Tyonek, Alaska, USA

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