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
September
Weather in September
Temperature
Start of September brings a shift in the average high-temperature, falling from August's comfortable 63.9°F (17.7°C) to a cool 52.5°F (11.4°C). The average temperature during September nights is registered at a cold 36.3°F (2.4°C).Humidity
In Olnes, Alaska, the average relative humidity in September is 75%.Rainfall
In September, the rain falls for 13.1 days. Throughout September, 1.26" (32mm) of precipitation is accumulated. In Olnes, during the entire year, the rain falls for 100.5 days and collects up to 10.87" (276mm) of precipitation.Snowfall
Months with snowfall in Olnes are January through May, August through December. In Olnes, during September, snow falls for 1.6 days and regularly aggregates up to 0.79" (20mm) of snow. Throughout the year, in Olnes, there are 74.3 snowfall days, and 24.49" (622mm) of snow is accumulated.Daylight
In September, the average length of the day is 13h and 1min.On the first day of the month, sunrise is at 6:32 am and sunset at 9:07 pm. On the last day of September, sunrise is at 8:00 am and sunset at 7:20 pm AKDT.
Sunshine
In September, the average sunshine is 7.4h.UV index
The average daily maximum UV index in September is 2. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for the average person.Note: A daily high UV index of 2 in September leads to these guidelines:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. Direct Sun exposure should be minimized especially during midday when radiation is most intense. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the average humidity in September?
How much does it rain in September?
How much does it snow in September?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Olnes have in September?
How high is the UV index in September?
Average temperature in September
Olnes, AK
- Average high temperature in September: 52.5°F
The warmest month (with the highest average high temperature) is July (70.7°F).
The month with the lowest average high temperature is January (2.1°F).
- Average low temperature in September: 36.3°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 (-9°F).
Average pressure in September
Olnes, 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
Olnes, AK
- Average wind speed in September: 4.4mph
The windiest month (with the highest average wind speed) is May (5mph).
The calmest months (with the lowest average wind speed) are October, November and December (4.2mph).
Average humidity in September
Olnes, AK
- Average humidity in September: 75%
The month with the highest relative humidity is March (93%).
The month with the lowest relative humidity is June (56%).
Average rainfall in September
Olnes, AK
- Average rainfall in September: 1.26"
The wettest month (with the highest rainfall) is August (2.44").
The driest month (with the least rainfall) is January (0.31").
Average rainfall days in September
Olnes, AK
- Average rainfall days in September: 13.1 days
The month with the highest number of rainy days is August (16.4 days).
The month with the least rainy days is February (1.8 days).
Average snowfall in September
Olnes, AK
- Average snowfall in September: 0.79"
The month with the highest snowfall is November (6.5").
The months with the least snowfall are June and July (0").
Average snowfall days in September
Olnes, AK
- Average snowfall days in September: 1.6 days
The month with the highest number of snowfall days is November (13.3 days).
The months with the least snowfall days are June and July (0 days).
Average daylight in September /
Average sunshine in September
Olnes, AK
- Average daylight in September: 13h and 0min
The month with the longest days is June (Average daylight: 21h and 48min).
The month with the shortest days is December (Average daylight: 3h and 48min).
- Average sunshine in September: 7h and 2min
The month with the most sunshine is June (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 2h and 0min).
Average sunshine days in September
Olnes, AK
- Average sunshine days in September: 14.1 days
The month with the most sunshine days is January (21.4 days).
The month with the least sunshine days is April (12.2 days).
Average UV index in September
Olnes, 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, November and December (UV index 1).
Average cloud cover in September
Olnes, AK
- Average cloud cover in September: 48
The months with the most cloud cover are March, April and November (Cloud cover 53).
The month with the least cloud cover is May (Cloud cover 39).
Average visibility in September
Olnes, 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 (4mi).