Boulder
January
Weather in Boulder for January 2026
Your guide to Boulder weather in January - trends and predictions
With an average of 4 snowy days, Boulder usually enjoys a light touch of snow in January.
In general, the average temperature in Boulder at the beginning of January is 1.3 °F. As the month progressed, temperatures tended to slightly decrease, reaching an average of 1.1 °F by the end of January.
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Snow Forecast ❄️
Temperatures
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18
Dry days
9
Rainy days
4
Snow days
1°/-10°
Temperatures
16 km/h
Avg max wind
58 %
Avg humidity
Boulder Weather January
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| Sun. | Mon. | Tue. | Wed. | Thu. | Fri. | Sat. |
|---|---|---|---|---|---|---|
| 1  2° | 2  5° | 3  7° | ||||
| 4 1° | 5 -1° | 6  -1° | 7  -4° | 8 2° | 9 0° | 10 2° |
| 11 3° | 12 0° | 13 0° | 14 3° | 15 7° | 16 11° | 17 6° |
| 18 -9° | 19 -10° | 20 -14° | 21 0° | 22 -2° | 23 0° | 24 3° |
| 25 -7° | 26 -5° | 27 2° | 28 2° | 29 0° | 30 6° | 31  10° |
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Temperatures trend during January in Boulder
See the weather trend as well as the moving average line
January weather day by day
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| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| Jan. 1 | Overcast | 2° /-7° | 0.5 mm | 0 cm | |
| Jan. 2 | Light freezing rain | 5° /-5° | 0.7 mm | 0 cm | |
| Jan. 3 | Sunny | 7° /-3° | 0 mm | 0 cm | |
| Jan. 4 | Light freezing rain | 1° /-4° | 0.1 mm | 0 cm | |
| Jan. 5 | Light freezing rain | -1° /-9° | 0.5 mm | 0 cm | |
| Jan. 6 | Cloudy | -1° /-5° | 0.9 mm | 0 cm | |
| Jan. 7 | Patchy moderate snow | -4° /-13° | 3.9 mm | 1.2 cm | |
| Jan. 8 | Sunny | 2° /-15° | 0 mm | 0 cm | |
| Jan. 9 | Light freezing rain | 0° /-9° | 1.3 mm | 0 cm | |
| Jan. 10 | Cloudy | 2° /-12° | 0 mm | 0 cm | |
| Jan. 11 | Cloudy | 3° /-5° | 0 mm | 0 cm | |
| Jan. 12 | Overcast | 0° /-10° | 0 mm | 0 cm | |
| Jan. 13 | Sunny | 0° /-12° | 0 mm | 0 cm | |
| Jan. 14 | Sunny | 3° /-9° | 0 mm | 0 cm | |
| Jan. 15 | Sunny | 7° /-7° | 0 mm | 0 cm | |
| Jan. 16 | Sunny | 11° /-2° | 0 mm | 0 cm | |
| Jan. 17 | Light freezing rain | 6° /-8° | 3.5 mm | 1.8 cm | |
| Jan. 18 | Light freezing rain | -9° /-14° | 3 mm | 1.1 cm | |
| Jan. 19 | Cloudy | -10° /-20° | 1 mm | 0 cm | |
| Jan. 20 | Overcast | -14° /-22° | 1.2 mm | 0 cm | |
| Jan. 21 | Cloudy | 0° /-20° | 0 mm | 0 cm | |
| Jan. 22 | Overcast | -2° /-12° | 0 mm | 0 cm | |
| Jan. 23 | Sunny | 0° /-13° | 0 mm | 0 cm | |
| Jan. 24 | Light freezing rain | 3° /-9° | 0.4 mm | 0 cm | |
| Jan. 25 | Patchy moderate snow | -7° /-13° | 5.8 mm | 2.2 cm | |
| Jan. 26 | Light freezing rain | -5° /-14° | 0.5 mm | 0 cm | |
| Jan. 27 | Sunny | 2° /-13° | 0 mm | 0 cm | |
| Jan. 28 | Sunny | 2° /-11° | 0 mm | 0 cm | |
| Jan. 29 | Cloudy | 0° /-11° | 0 mm | 0 cm | |
| Jan. 30 | Cloudy | 6° /-6° | 0.1 mm | 0 cm | |
| Jan. 31 | Partly cloudy | 10° /-3° | 0 mm | 0 cm | |
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Important Notice
Our weather forecast for Boulder in January is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Boulder forecast closer to your planned date for the most up-to-date weather information.
Boulder in January - FAQ
What are the expected maximum and minimum temperatures in Boulder during January?
Brace for cold days with temperatures not exceeding 1° and nights that are likely to be freezing. Winter clothing is essential for comfort and safety.
How much rainfall should be expected in Boulder during January?
In January, Boulder can expect light to moderate rainfall, totaling 23.4 mm across approximately 9 days. Occasional showers are possible, and planning ahead for them could be helpful.
Will it snow in Boulder in January 2026?
Boulder experiences an average snowfall of 6.3 cm during January, occurring over 4 days.
What are the typical wind conditions in Boulder during January?
The average wind speed in Boulder during January is 16 km/h, suggesting breezy to windy conditions, depending on your activities.
Boulder snow forecast January 2026
Track daily snowfall levels and discover Boulder’s snowy potential this January ❄️
January rainfall patterns in Boulder
Explore the daily rainfall trends and prepare for Boulders January weather 💧
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