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The weather in Idaho Falls in December is very cold with temperatures between -9°C and -2°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Idaho Falls during the month of December. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Let it snow! You can expect Idaho Falls to be covered in white during the month of December. Be sure to bundle up when you venture outside, or take the opportunity to enjoy hot cocoa by the fire for warmth this month.
Our weather forecast can give you a great sense of what weather to expect in Idaho Falls in December 2024.
If you’re planning to visit Idaho Falls in the near future, we highly recommend that you review the 14 day weather forecast for Idaho Falls before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -2° / -11° | 4 | 9 | 18 | 34 mm | Awful | Idaho Falls in January |
| February | -1° / -9° | 6 | 6 | 18 | 31 mm | Awful | Idaho Falls in February |
| March | 6° / -3° | 6 | 14 | 12 | 40 mm | Awful | Idaho Falls in March |
| April | 12° / 1° | 6 | 19 | 6 | 43 mm | Bad | Idaho Falls in April |
| May | 18° / 5° | 6 | 23 | 1 | 59 mm | Good | Idaho Falls in May |
| June | 25° / 8° | 3 | 27 | 0 | 32 mm | Perfect | Idaho Falls in June |
| July | 31° / 12° | 1 | 30 | 0 | 22 mm | Good | Idaho Falls in July |
| August | 30° / 12° | 2 | 29 | 0 | 38 mm | Good | Idaho Falls in August |
| September | 25° / 9° | 3 | 27 | 0 | 47 mm | Perfect | Idaho Falls in September |
| October | 14° / 3° | 4 | 25 | 2 | 44 mm | Ok | Idaho Falls in October |
| November | 6° / -3° | 4 | 17 | 9 | 26 mm | Awful | Idaho Falls in November |
| December | -2° / -9° | 5 | 8 | 18 | 35 mm | Awful | Idaho Falls in December |