September weather forecastBig Delta, AK
September
Weather in September
The first month of the autumn, September, is still a cool month in Big Delta, Alaska, with temperature in the range of an average low of 37.9°F (3.3°C) and an average high of 53.6°F (12°C).Temperature
Setting in of September comes with a decrease in the average high-temperature, moving from a comfortable 64.4°F (18°C) in August to a cool 53.6°F (12°C). Throughout September, Big Delta encounters an average temperature drop to a wintry 37.9°F (3.3°C).Humidity
The average relative humidity in September in Big Delta is 67%.Rainfall
In Big Delta, in September, during 8.4 rainfall days, 0.59" (15mm) of precipitation is typically accumulated. Throughout the year, there are 70.4 rainfall days, and 7.56" (192mm) of precipitation is accumulated.Snowfall
January through May, August through December are months with snowfall. In Big Delta, during September, snow falls for 1.9 days and regularly aggregates up to 0.71" (18mm) of snow. In Big Delta, during the entire year, snow falls for 56.2 days and aggregates up to 18.66" (474mm) of snow.Daylight
In September, the average length of the day is 12h and 58min.On the first day of the month, sunrise is at 6:28 am and sunset at 8:57 pm. On the last day of September, sunrise is at 7:52 am and sunset at 7:13 pm AKDT.
Sunshine
In Big Delta, the average sunshine in September is 8.4h.UV index
January through March, September through December, with an average maximum UV index of 2, 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 rays for the average person.Note: The daily high UV index of 2 during September translates into the following recommendations:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. Around midday, solar radiation is most harmful; hence, exposure should be limited. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Big Delta, AK
- Average high temperature in September: 53.6°F
The warmest month (with the highest average high temperature) is July (69.8°F).
The month with the lowest average high temperature is January (5.4°F).
- Average low temperature in September: 37.9°F
The month with the highest average low temperature is July (50.5°F).
The coldest month (with the lowest average low temperature) is January (-5.8°F).
Average pressure in September
Big Delta, AK
- Average pressure in September: 29.77"Hg
The month with the highest atmospheric pressure is February (29.97"Hg).
The month with the lowest atmospheric pressure is September (29.77"Hg).
Average wind speed in September
Big Delta, AK
- Average wind speed in September: 5.3mph
The windiest month (with the highest average wind speed) is May (5.8mph).
The calmest month (with the lowest average wind speed) is November (4.9mph).
Average humidity in September
Big Delta, AK
- Average humidity in September: 67%
The month with the highest relative humidity is March (88%).
The month with the lowest relative humidity is May (51%).
Average rainfall in September
Big Delta, AK
- Average rainfall in September: 0.59"
The wettest month (with the highest rainfall) is August (1.57").
The driest month (with the least rainfall) is February (0.24").
Average rainfall days in September
Big Delta, AK
- Average rainfall days in September: 8.4 days
The month with the highest number of rainy days is August (12.3 days).
The month with the least rainy days is November (1.7 days).
Average snowfall in September
Big Delta, AK
- Average snowfall in September: 0.71"
The months with the highest snowfall are March and October (2.99").
The months with the least snowfall are June and July (0").
Average snowfall days in September
Big Delta, AK
- Average snowfall days in September: 1.9 days
The month with the highest number of snowfall days is November (9.6 days).
The months with the least snowfall days are June and July (0 days).
Average daylight in September /
Average sunshine in September
Big Delta, AK
- Average daylight in September: 13h and 0min
The month with the longest days is June (Average daylight: 20h and 54min).
The month with the shortest days is December (Average daylight: 4h and 24min).
- Average sunshine in September: 8h and 24min
The month with the most sunshine is June (Average sunshine: 13h and 24min).
The month with the least sunshine is December (Average sunshine: 2h and 18min).
Average sunshine days in September
Big Delta, AK
- Average sunshine days in September: 18.6 days
The months with the most sunshine days are January and December (23.5 days).
The month with the least sunshine days is August (17.4 days).
Average UV index in September
Big Delta, AK
- Average UV index in September: 2
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, March, September, October, November and December (UV index 2).
Average cloud cover in September
Big Delta, AK
- Average cloud cover in September: 40
The months with the most cloud cover are March and November (Cloud cover 45).
The month with the least cloud cover is May (Cloud cover 35).
Average visibility in September
Big Delta, AK
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, March, April, November and December (5mi).
