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The weather in Helena in December is very cold with temperatures between -10°C and -3°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Helena 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 Helena 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 Helena in December 2024.
If you’re planning to visit Helena in the near future, we highly recommend that you review the 14 day weather forecast for Helena before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -2° / -9° | 6 | 10 | 16 | 39 mm | Awful | Helena in January |
| February | -2° / -10° | 6 | 5 | 18 | 47 mm | Awful | Helena in February |
| March | 4° / -5° | 8 | 10 | 15 | 62 mm | Awful | Helena in March |
| April | 9° / -3° | 8 | 10 | 12 | 86 mm | Awful | Helena in April |
| May | 15° / 2° | 9 | 19 | 3 | 106 mm | Bad | Helena in May |
| June | 21° / 6° | 8 | 22 | 0 | 105 mm | Ok | Helena in June |
| July | 28° / 9° | 3 | 28 | 0 | 45 mm | Perfect | Helena in July |
| August | 26° / 10° | 3 | 28 | 0 | 49 mm | Perfect | Helena in August |
| September | 21° / 6° | 3 | 26 | 1 | 44 mm | Good | Helena in September |
| October | 11° / 0° | 4 | 22 | 6 | 51 mm | Bad | Helena in October |
| November | 3° / -6° | 3 | 15 | 12 | 38 mm | Awful | Helena in November |
| December | -3° / -10° | 6 | 8 | 17 | 37 mm | Awful | Helena in December |