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The weather in Boulder in January is very cold with temperatures between -8°C and 2°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Boulder during the month of January. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Boulder is going to experience quite a number of days of snow during January. It’s the perfect time to build snowmen, drink hot cocoa, and have a snowball fight. Just remember to wear a warm scarf and a pair of mittens!
Our weather forecast can give you a great sense of what weather to expect in Boulder in January 2025.
If you’re planning to visit Boulder in the near future, we highly recommend that you review the 14 day weather forecast for Boulder before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 2° / -8° | 4 | 16 | 10 | 27 mm | Awful | Boulder in January |
| February | 1° / -8° | 4 | 10 | 14 | 54 mm | Awful | Boulder in February |
| March | 7° / -3° | 4 | 17 | 10 | 83 mm | Bad | Boulder in March |
| April | 11° / 0° | 6 | 17 | 7 | 95 mm | Bad | Boulder in April |
| May | 15° / 5° | 11 | 17 | 3 | 160 mm | Bad | Boulder in May |
| June | 23° / 12° | 7 | 23 | 0 | 89 mm | Good | Boulder in June |
| July | 26° / 15° | 8 | 23 | 0 | 115 mm | Good | Boulder in July |
| August | 25° / 13° | 5 | 26 | 0 | 75 mm | Perfect | Boulder in August |
| September | 21° / 10° | 4 | 25 | 0 | 66 mm | Good | Boulder in September |
| October | 13° / 2° | 3 | 24 | 4 | 47 mm | Bad | Boulder in October |
| November | 7° / -3° | 2 | 21 | 7 | 33 mm | Bad | Boulder in November |
| December | 1° / -8° | 5 | 15 | 11 | 30 mm | Awful | Boulder in December |