Temperatures in September
It's cool in September in Glacier Bay National Park 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 6°C and 10°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Glacier Bay National Park in September. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of September
The month of September starts in Glacier Bay National Park with cool temperatures, averaging around 16°C during the day and nights close to 10°C. You can expect regular precipitation, but there’s also a chance for some sunny days in the first days of the month.
Mid-September
By mid-September, the average daytime temperature drops to around 15°C, with nights close to 9°C. During this part of the month, you can expect regular precipitation, but there’ll also be some sunny days.
End of September
By the end of September, the average daytime temperature in Glacier Bay National Park will be around 13°C, with nights close to 8°C. There’s regular precipitation, but with a bit of luck, you’ll also get some dry and sunny days.
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Precipitation in September
In September, there is an average of 140 mm of precipitation, spread over 17 days. The wind speed is around 3 Bft, mostly coming from the South.
Across the whole month, the average precipitation chance is 57% per day. Though that seems frequent, the weather’s variable. There are also a few days with lower precipitation chances.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in September for Glacier Bay National Park. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Glacier Bay National Park in September |
UK | ||
|---|---|---|---|
 Average Temperature |
14°C | 20°C | |
 High Temp |
16°C | 22°C | |
| Low Temp |
12°C | 17°C | |
 Total Precipitation |
140 mm | 44 mm | |
| Rainy Days |
17 days | 8 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 Glacier Bay National Park?
After some sun? Then September isn’t the best time to be in Glacier Bay National Park. There’s too much chance of rain this month.
Temperature records for Glacier Bay National Park in September
With 24°C, Glacier Bay National Park hit the highest temperature in the last 10 years in September 2019. The lowest daytime temperature in this month was 8°C in 2015. The extreme night temperatures ranged from a low of -2°C to a high of 14°C.
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Daily Temperature in September in Glacier Bay National Park
This chart shows the average daily temperatures, both day and night, for each day in September in Glacier Bay National Park, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in September in Glacier Bay National Park
The chart below shows the average daily precipitation in September for Glacier Bay National Park, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown 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 rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for September, you can expect around 17 days of rain in Glacier Bay National Park.
Daily UV Index in September in Glacier Bay National Park
This chart shows the average daily UV index in September in Glacier Bay National Park, 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 Glacier Bay National Park Over the Years
This chart shows the average temperature in September in Glacier Bay National Park, measured in degrees Celsius, over the past years.
Total Precipitation in September in Glacier Bay National Park Over the Years
This chart shows the average precipitation in September in Glacier Bay National Park, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in September for Glacier Bay National Park
Click on a specific day in September for detailed info on the typical weather on that day in Glacier Bay National Park. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Glacier Bay National Park
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Average Weather in Glacier Bay National Park by Month
Click on a month below to see detailed weather info for Glacier Bay National Park. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of Glacier Bay National Park for all months at once
