Boulder County (Boulder)
January
Weather in Boulder County for January 2026
Your guide to Boulder County weather in January - trends and predictions
With an average of 4 snowy days, Boulder County usually enjoys a light touch of snow in January.
In general, the average temperature in Boulder County 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 County 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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Access Boulder County weather forecasts with a simple click. Select any date for comprehensive insights on temperature, rainfall, and wind conditions.
Temperatures trend during January in Boulder County
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 County 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 County forecast closer to your planned date for the most up-to-date weather information.
Boulder County in January - FAQ
What are the expected maximum and minimum temperatures in Boulder County 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 County during January?
In January, Boulder County 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 County in January 2026?
Boulder County experiences an average snowfall of 6.3 cm during January, occurring over 4 days.
What are the typical wind conditions in Boulder County during January?
The average wind speed in Boulder County during January is 16 km/h, suggesting breezy to windy conditions, depending on your activities.
Boulder County snow forecast January 2026
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January rainfall patterns in Boulder County
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