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The weather in Denali National Park in September is very cold with temperatures between 4°C and 10°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Denali National Park during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Please note that Denali National Park can expect a few days of snow in September.
Our weather forecast can give you a great sense of what weather to expect in Denali National Park in September 2025.
If you’re planning to visit Denali National Park in the near future, we highly recommend that you review the 14 day weather forecast for Denali National Park before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -17° / -22° | 5 | 25 | 1 | 8 mm | Awful | Denali National Park in January |
| February | -13° / -19° | 8 | 19 | 2 | 17 mm | Awful | Denali National Park in February |
| March | -8° / -15° | 5 | 25 | 2 | 11 mm | Awful | Denali National Park in March |
| April | 2° / -6° | 4 | 23 | 3 | 12 mm | Awful | Denali National Park in April |
| May | 13° / 4° | 5 | 26 | 0 | 26 mm | Ok | Denali National Park in May |
| June | 19° / 10° | 8 | 22 | 0 | 63 mm | Ok | Denali National Park in June |
| July | 20° / 12° | 8 | 23 | 0 | 71 mm | Ok | Denali National Park in July |
| August | 17° / 9° | 9 | 22 | 0 | 86 mm | Ok | Denali National Park in August |
| September | 10° / 4° | 6 | 23 | 1 | 50 mm | Ok | Denali National Park in September |
| October | 1° / -4° | 6 | 23 | 2 | 29 mm | Awful | Denali National Park in October |
| November | -11° / -15° | 7 | 20 | 3 | 24 mm | Awful | Denali National Park in November |
| December | -15° / -20° | 8 | 20 | 2 | 22 mm | Awful | Denali National Park in December |