Temperatures in September

It's cold in September in Denali National Park with an average temperature of 6°C. Temperatures this month range from a low of 1°C to a high of 9°C. At night, you can expect temperatures between -6°C and 2°C.

Max and Min Temperatures per Day

Daily Temperature in September in Denali National Park

This chart shows the daily maximum and minimum temperatures in degrees Celsius for Denali 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 Denali National Park with cold temperatures, averaging around 8°C during the day and nights close to 1°C. Plenty of days with a chance of precipitation.

Mid-September

By mid-September, the average daytime temperature drops to around 7°C, with nights close to 0°C. The chance of precipitation is high during this period.

End of September

By the end of September, the average daytime temperature in Denali National Park will be around 3°C, with nights close to -4°C. There’s a significant chance of many days with precipitation. Wear a thick winter coat, jumper, long trousers, hat, and gloves.

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Precipitation in September

In September, there is an average of 269 mm of precipitation, spread over 20 days. Of the total precipitation, about 60 cm falls as snow in September. The wind speed is around 2 Bft, mostly coming from the South.

The average precipitation chance this month is 68% per day. Though that seems frequent, there are also a few days with lower precipitation chances.

Precipitation Chance

This chart shows the daily precipitation chance (in percentages) in September for Denali 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.

Denali National Park in September		UK
Average Temperature	6°C	20°C
High Temp	9°C	22°C
Low Temp	1°C	17°C
Total Precipitation	269 mm	44 mm
Rainy Days	20 days	8 days
Total Snowfall	60 cm	0 cm
Snowy Days	21 days	0 days

August

October

UV index

The UV index is a maximum of 5 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 Denali National Park?

After some sun? Then September isn’t the best time to be in Denali National Park. There’s too much chance of rain this month.

Temperature records for Denali National Park in September

With 20°C, Denali National Park hit the highest temperature in the last 10 years in September 2016. The lowest daytime temperature in this month was -10°C in 2023. The extreme night temperatures ranged from a low of -17°C to a high of 8°C.

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August

October

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Daily Temperature in September in Denali National Park

This chart shows the average daily temperatures, both day and night, for each day in September in Denali 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 Denali National Park

The chart below shows the average daily precipitation in September for Denali 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 20 days of rain in Denali National Park.

Daily Precipitation in September in Denali National Park

Daily Snowfall in September in Denali National Park

This chart shows the average daily snowfall in September in Denali National Park, measured in centimetres. The bottom of the chart shows the days of the month. The data is based on historical measurements and gives an idea of the average snowfall in September.

Daily UV Index in September in Denali National Park

This chart shows the average daily UV index in September in Denali 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 Denali National Park Over the Years

This chart shows the average temperature in September in Denali National Park, measured in degrees Celsius, over the past years.

Total Precipitation in September in Denali National Park Over the Years

This chart shows the average precipitation in September in Denali National Park, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.

Snowfall in September in Denali National Park per year

This chart shows the average snowfall in September in Denali National Park, measured in centimetres, over the past years.

Snowfall in September in Denali National Park over the past years

August

October

Daily climate in September for Denali National Park

Click on a specific day in September for detailed info on the typical weather on that day in Denali National Park. Check out the historical temperatures and precipitation over the past 10 years on this day.

Average Weather in Denali National Park by Month

Click on a month below to see detailed weather info for Denali National Park. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.