Ada County (Boise)
January
Weather in Ada County, Idaho for January 2027
Your guide to Ada County weather in January - trends and predictions
Ada County typically experiences moderate snowfall in January, with an average of 7 snowy days.
In general, the average temperature in Ada County at the beginning of January is 3.2 °C. As the month progressed, temperatures tended to slightly increase, reaching an average of 3.6 °C by the end of January.
Is January a good time to visit Ada County? check out the best time to travel to Ada County page.
✨ Is January a good time to visit Ada County? – Ask the AI Weatherman
Snow Forecast ❄️
Temperatures
More
20
Dry days
4
Rainy days
7
Snow days
2°/-4°
Temperatures
11 km/h
Avg max wind
85 %
Avg humidity
Ada County Weather January
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Temperatures trend during January in Ada County
See the weather trend as well as the moving average line
January weather in Ada County day by day
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| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| Jan. 1 |  Moderate snow | 3° /-1° | 16.3 mm | 6.9 cm | |
| Jan. 2 |  Light snow | 5° /0° | 21.9 mm | 1.1 cm | |
| Jan. 3 |  Light rain | 5° /0° | 4.6 mm | 0 cm | |
| Jan. 4 | Light rain | 4° /1° | 7.6 mm | 0.9 cm | |
| Jan. 5 | Light rain | 3° /-1° | 7.3 mm | 0.4 cm | |
| Jan. 6 | Light snow | 2° /-2° | 4.2 mm | 1.8 cm | |
| Jan. 7 | Light snow | 1° /-4° | 3.4 mm | 0.5 cm | |
| Jan. 8 | Light snow | -1° /-4° | 1.1 mm | 0.9 cm | |
| Jan. 9 | Light snow | 1° /-2° | 3.8 mm | 3.1 cm | |
| Jan. 10 | Light snow | 2° /-5° | 2.2 mm | 1.9 cm | |
| Jan. 11 | Moderate snow | 1° /-5° | 0.4 mm | 0.2 cm | |
| Jan. 12 | Light snow | 1° /-5° | 3.9 mm | 2.3 cm | |
| Jan. 13 | Light snow | 0° /-6° | 5.2 mm | 4.4 cm | |
| Jan. 14 | Light snow | 0° /-7° | 1.3 mm | 1.1 cm | |
| Jan. 15 |  Mist | -1° /-6° | 0 mm | 0 cm | |
| Jan. 16 | Mist | -3° /-8° | 0 mm | 0 cm | |
| Jan. 17 | Light snow | 1° /-6° | 4.8 mm | 4.1 cm | |
| Jan. 18 |  Light freezing rain | 1° /-3° | 0.8 mm | 0 cm | |
| Jan. 19 |  Overcast | 1° /-3° | 0.4 mm | 0 cm | |
| Jan. 20 | Light snow | 0° /-5° | 1.1 mm | 0.9 cm | |
| Jan. 21 |  Light sleet | 1° /-5° | 2.1 mm | 0 cm | |
| Jan. 22 |  Patchy rain possible | 1° /-3° | 1.2 mm | 0 cm | |
| Jan. 23 | Light snow | 2° /-4° | 1.1 mm | 0 cm | |
| Jan. 24 |  Freezing fog | 1° /-4° | 0.1 mm | 0 cm | |
| Jan. 25 | Patchy rain possible | 1° /-5° | 1.9 mm | 0.6 cm | |
| Jan. 26 | Mist | 1° /-8° | 0 mm | 0 cm | |
| Jan. 27 | Light drizzle | 3° /-4° | 1.6 mm | 0 cm | |
| Jan. 28 | Light rain | 3° /-4° | 3.3 mm | 1.2 cm | |
| Jan. 29 | Patchy rain possible | 4° /-3° | 0 mm | 0 cm | |
| Jan. 30 |  Sunny | 6° /-2° | 0 mm | 0 cm | |
| Jan. 31 | Light snow | 6° /0° | 3.9 mm | 2.4 cm | |
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Important Notice
Our weather forecast for Ada 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 Ada County forecast closer to your planned date for the most up-to-date weather information.
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Ada County in January - FAQ
What are the expected maximum and minimum temperatures in Ada County during January?
Brace for cold days with temperatures not exceeding 2° and nights that are likely to be freezing. Winter clothing is essential for comfort and safety.
How much rainfall should be expected in Ada County during January?
Significant rainfall exceeding 105.6 mm is expected in Ada County during January, occurring over more than 4 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Ada County in January 2027?
Ada County experiences an average snowfall of 34.7 cm during January, occurring over 7 days.
What are the typical wind conditions in Ada County during January?
The average wind speed in Ada County during January is 11 km/h, suggesting breezy to windy conditions, depending on your activities.
Ada County snow forecast January 2027
Track daily snowfall levels and discover Ada County’s snowy potential this January ❄️
On average, Ada County sees 7 snowy days during January, with approximately 34.7 cm of total snowfall.
January rainfall patterns in Ada County
Explore the daily rainfall trends and prepare for Ada Countys January weather 💧
Typically, Ada County has 4 rainy days in January with a total of 105.6 mm of rainfall.
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