Click on a day for an hourly weather forecast
The weather in Gillette in October is very cold with temperatures between 4°C and 14°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Gillette during the month of October. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Please note that Gillette can expect a few days of snow in October.
Our weather forecast can give you a great sense of what weather to expect in Gillette in October 2025.
If you’re planning to visit Gillette in the near future, we highly recommend that you review the 14 day weather forecast for Gillette before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 0° / -8° | 7 | 21 | 3 | 17 mm | Awful | Gillette in January |
| February | 0° / -9° | 8 | 17 | 3 | 21 mm | Awful | Gillette in February |
| March | 8° / -3° | 5 | 22 | 3 | 34 mm | Bad | Gillette in March |
| April | 11° / 1° | 9 | 18 | 3 | 64 mm | Awful | Gillette in April |
| May | 18° / 7° | 11 | 20 | 0 | 98 mm | Ok | Gillette in May |
| June | 25° / 13° | 9 | 21 | 0 | 75 mm | Good | Gillette in June |
| July | 30° / 17° | 8 | 23 | 0 | 45 mm | Good | Gillette in July |
| August | 29° / 17° | 6 | 25 | 0 | 51 mm | Good | Gillette in August |
| September | 24° / 12° | 4 | 26 | 0 | 43 mm | Perfect | Gillette in September |
| October | 14° / 4° | 5 | 24 | 2 | 49 mm | Ok | Gillette in October |
| November | 7° / -2° | 5 | 23 | 2 | 19 mm | Bad | Gillette in November |
| December | 0° / -8° | 6 | 22 | 3 | 20 mm | Awful | Gillette in December |