United StatesAverage weather for Juneau in September
It's cool in September in Juneau with an average temperature of 14°C. Temperatures this month range from a low of 12°C to a high of 16°C. At night, you can expect temperatures between 7°C and 11°C.
Start of September
The month of September starts in Juneau with cool temps, averaging around 16°C during the day and nights around 11°C. There are plenty of days with a good chance of precipitation.
Mid September
By mid-September, daytime temps drop to around 14°C, with nights around 9°C. There’s a high chance of precipitation during this time.
End of September
By the end of September, the average daytime temperature in Juneau is around 13°C, while nighttime temps are about 9°C. There’s a significant chance of many days with precipitation. Go for a warm jacket, sweater or hoodie, and long pants.
In September, there is an average of 225 mm of precipitation, spread over 19 days. The wind speed is around 3 Bft, mostly coming from the South.
Juneau in September |
New York | ||
|---|---|---|---|
 Average temperature |
14°C | 27°C | |
 Max. temperature |
16°C | 31°C | |
| Min. temperature |
12°C | -5°C | |
 Total precipitation |
225 mm | 57 mm | |
| Rainy days |
19 days | 9 days | |
August
UV index
The UV index is a maximum of 4 this month. That's a moderate value on the intensity scale of 1 to 11. Unprotected skin can burn in about 30 minutes.
Is September a good time to visit Juneau?
Looking for sun? September isn’t a good month to be in Juneau. There’s too much chance of rain this month.
Temperature records
With 22°C in 2018, Juneau reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 8°C in 2015. The extreme nighttime temperatures ranged from a lowest recorded value of 0°C to a highest value of 14°C.
Check out the climate of Juneau for all months and discover the best travel time
Daily Temperature in September in Juneau
This chart shows the average daily high and low temperatures in September for Juneau, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in September in Juneau
The chart below shows the average daily precipitation in September for Juneau, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for September, you can expect about 19 days of precipitation in Juneau.
Daily UV index in September in Juneau
This chart shows the average daily UV index in September in Juneau, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in September in Juneau over the years
This chart shows the average temperature in September in Juneau, measured in degrees Celsius, over the past few years.
Total precipitation in September in Juneau over the years
This chart shows the average precipitation in September in Juneau, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in September for Juneau
Click on any day in September to get detailed info about the usual weather on that day in Juneau. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Juneau
Have you been to Juneau in September?
Share your weather experience in September in Juneau.
Average weather in Juneau by month
Click on a month below to see detailed weather info for Juneau. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
