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
The start of September comes with a reduction in the average high-temperature, receding from an enjoyable 64.4°F (18°C) in August to a cool 53.6°F (12°C). September nights are marked by an average temperature drop to a wintry 37.9°F (3.3°C).Humidity
The average relative humidity in September is 67%.Rainfall
In September, the rain falls for 8.4 days. Throughout September, 0.59" (15mm) of precipitation is accumulated. In Delta Junction, during the entire year, the rain falls for 70.4 days and collects up to 7.56" (192mm) of precipitation.Snowfall
Months with snowfall are January through May, August through December. In September, it is snowing for 1.9 days. Throughout September, 0.71" (18mm) of snow is accumulated. In Delta Junction, during the entire year, snow falls for 56.2 days and aggregates up to 18.66" (474mm) of snow.Daylight
The average length of the day in September in Delta Junction is 12h and 58min.On the first day of the month, sunrise is at 6:28 am and sunset at 8:56 pm. On the last day of September, sunrise is at 7:51 am and sunset at 7:13 pm AKDT.
Sunshine
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 in Delta Junction. A UV Index reading of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: In September, a daily maximum UV index of 2 leads to the following instructions:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Always opt for UVA and UVB-resistant sunglasses on radiant days. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September?
How much does it rain in Delta Junction in September?
How many days does it snow in September?
What is the average length of the day in September?
When is the sunrise / sunset in September in Delta Junction?
How long on average sun shines in September?
What is the month with the lowest UV index?
How high is the UV index in September?
Average temperature in September
Delta Junction, 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
Delta Junction, 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
Delta Junction, 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
Delta Junction, 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
Delta Junction, 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
Delta Junction, 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
Delta Junction, 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
Delta Junction, 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
Delta Junction, AK
- Average daylight in September: 13h and 0min
The month with the longest days is June (Average daylight: 20h and 48min).
The month with the shortest days is December (Average daylight: 4h and 24min).
- Average sunshine in September: 8h and 2min
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
Delta Junction, 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
Delta Junction, 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
Delta Junction, 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
Delta Junction, 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).
Delta Junction, Alaska, USA
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