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The weather in Idaho in October is very cold with temperatures between 1°C and 9°C, warm clothes are a must.
Idaho is going to be cold and wet in the month of October. Expect low temperatures and a few days of rain, so be sure to bundle up to avoid catching a cold.
You can expect a few days of snow in Idaho during October. It’s important to get out your snow boots and warm mittens to stay warm while you explore Idaho.
Our weather forecast can give you a great sense of what weather to expect in Idaho in October 2025.
If you’re planning to visit Idaho in the near future, we highly recommend that you review the 14 day weather forecast for Idaho before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -15° / -22° | 1 | 23 | 7 | 3 mm | Awful | Idaho in January |
| February | -11° / -19° | 2 | 19 | 7 | 6 mm | Awful | Idaho in February |
| March | 0° / -9° | 3 | 20 | 8 | 10 mm | Awful | Idaho in March |
| April | 11° / 1° | 1 | 25 | 3 | 22 mm | Bad | Idaho in April |
| May | 19° / 8° | 4 | 27 | 1 | 44 mm | Good | Idaho in May |
| June | 24° / 15° | 5 | 25 | 0 | 60 mm | Perfect | Idaho in June |
| July | 27° / 18° | 5 | 26 | 0 | 84 mm | Perfect | Idaho in July |
| August | 25° / 16° | 3 | 28 | 0 | 57 mm | Perfect | Idaho in August |
| September | 19° / 9° | 4 | 26 | 0 | 37 mm | Good | Idaho in September |
| October | 9° / 1° | 2 | 26 | 3 | 24 mm | Bad | Idaho in October |
| November | -3° / -9° | 2 | 21 | 8 | 12 mm | Awful | Idaho in November |
| December | -13° / -19° | 1 | 22 | 7 | 4 mm | Awful | Idaho in December |