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