Click on a day for an hourly weather forecast
The weather in National Park in September is very cold with temperatures between -3°C and 3°C, warm clothes are a must.
There’s going to be many days of rain during the month of September in National Park.
National Park should expect an average of 15 to 22 days of rain, so be sure to bring along a waterproof jacket to stay dry this month!
National Park is going to experience quite a number of days of snow during September. It’s the perfect time to build snowmen, drink hot cocoa, and have a snowball fight. Just remember to wear a warm scarf and a pair of mittens!
Our weather forecast can give you a great sense of what weather to expect in National Park in September 2025.
If you’re planning to visit National Park in the near future, we highly recommend that you review the 14 day weather forecast for National Park before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 12° / 4° | 9 | 22 | 0 | 52 mm | Bad | National Park in January |
| February | 12° / 5° | 7 | 21 | 0 | 44 mm | Ok | National Park in February |
| March | 11° / 3° | 7 | 23 | 1 | 46 mm | Ok | National Park in March |
| April | 8° / 1° | 8 | 20 | 2 | 53 mm | Awful | National Park in April |
| May | 4° / -1° | 11 | 15 | 5 | 62 mm | Awful | National Park in May |
| June | 2° / -3° | 13 | 11 | 7 | 56 mm | Awful | National Park in June |
| July | 1° / -4° | 15 | 6 | 11 | 67 mm | Awful | National Park in July |
| August | 2° / -4° | 14 | 7 | 10 | 63 mm | Awful | National Park in August |
| September | 3° / -3° | 16 | 5 | 10 | 79 mm | Awful | National Park in September |
| October | 5° / -2° | 14 | 11 | 6 | 69 mm | Awful | National Park in October |
| November | 8° / 0° | 13 | 14 | 3 | 64 mm | Awful | National Park in November |
| December | 11° / 3° | 12 | 18 | 1 | 61 mm | Bad | National Park in December |