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 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
September heralds a minor drop in average high-temperature, sliding from August's refreshing 57.6°F (14.2°C) to a fresh 52°F (11.1°C). A steady low-temperature average of 46°F (7.8°C) is logged during September, reflecting a modest dip from daytime readings.Humidity
The average relative humidity in September is 78%.Rainfall
In Old Tyonek, in September, it is raining for 15.6 days, with typically 2.36" (60mm) of accumulated precipitation. In Old Tyonek, during the entire year, the rain falls for 128.2 days and collects up to 20.08" (510mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day 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 is 6.6h.UV index
In Old Tyonek, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the average person.Note: An average maximum UV index of 3 in September leads to these recommendations:
Exercise care. People with light skin might get burns in fewer than 30 minutes. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the average humidity in September?
How much does it rain in September?
When it does not snow in Old Tyonek?
Does it snow in Old Tyonek 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?
How high is the UV index in September?
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).
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).
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).
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%).
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").
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).
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").
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).
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).
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).
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).
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).
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).
Old Tyonek, Alaska, USA
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