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United States weather

Weather in Lewis and Clark County, Montana for January 2026

Your guide to Lewis and Clark County weather in January - trends and predictions

    Snow Forecast ❄️

  • Lewis and Clark County typically experiences moderate snowfall in January, with an average of 9 snowy days.
    According to Lewis and Clark County snow forecast for January 2026, 2 snowy days are expected until the end of the month. The closest date with snow is Thursday, January 22.

    • Temperatures

  • So far, January 2026 in Lewis and Clark County is slightly warmer than the historical average by 1.5 °F.

  • The forecast for the next days in Lewis and Clark County predicts temperatures to be around 5 °F, close to the historical average.

  • In general, the average temperature in Lewis and Clark County at the beginning of January is 1.1 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 5.6 °F by the end of January.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
17
Dry days
Average rainy days
5
Rainy days
Average snowy days
9
Snow days
Average temperatures
-1°/-11°
Temperatures
Average wind speed
9 km/h
Avg max wind
Average humidity
78 %
Avg humidity

Lewis and Clark County Weather January

Move between months or click on a day
December
February
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Light freezing rain
2°
2
Light freezing rain
3°
3
Moderate or heavy snow showers
-1°
4
Patchy moderate snow
4°
5
Light freezing rain
1°
6
Patchy moderate snow
-1°
7
Overcast
0°
8
Patchy moderate snow
0°
9
Overcast
0°
10
Patchy rain possible
4°
11
Patchy moderate snow
3°
12
Light freezing rain
3°
13
Light freezing rain
3°
14
Partly cloudy
6°
15
Sunny
3°
16
Cloudy
2°
17
Light freezing rain
2°
18
Light freezing rain
-11°
19
Sunny
2°
20
Sunny
4°
21
Partly cloudy
3°
22
Patchy rain possible
7°
23
Light freezing rain
3°
24
Overcast
4°
25
Partly cloudy
4°
26
Partly cloudy
7°
27
Sunny
7°
28
Sunny
9°
29
Partly cloudy
7°
30
Cloudy
1°
31
Overcast
4°

Temperatures trend during January in Lewis and Clark County

See the weather trend as well as the moving average line

January weather in Lewis and Clark County day by day

Click on a date for more information
December February
Date Weather Temperatures Rain Snow More
Jan. 1 Light freezing rain
Light freezing rain
 2° /-5° 0.2 mm 0 cm
Jan. 2 Light freezing rain
Light freezing rain
 3° /-4° 0.6 mm 0 cm
Jan. 3 Moderate or heavy snow showers
Moderate or heavy snow showers
 -1° /-5° 3.3 mm 1.8 cm
Jan. 4 Patchy moderate snow
Patchy moderate snow
 4° /-6° 1.5 mm 0.6 cm
Jan. 5 Light freezing rain
Light freezing rain
 1° /-7° 1.5 mm 0 cm
Jan. 6 Patchy moderate snow
Patchy moderate snow
 -1° /-6° 1.2 mm 0.5 cm
Jan. 7 Overcast
Overcast
 0° /-7° 0.2 mm 0 cm
Jan. 8 Patchy moderate snow
Patchy moderate snow
 0° /-10° 2 mm 0.8 cm
Jan. 9 Overcast
Overcast
 0° /-8° 0.8 mm 0.5 cm
Jan. 10 Patchy rain possible
Patchy rain possible
 4° /-6° 0.1 mm 0 cm
Jan. 11 Patchy moderate snow
Patchy moderate snow
 3° /-4° 4.7 mm 2.7 cm
Jan. 12 Light freezing rain
Light freezing rain
 3° /-3° 1.6 mm 1.1 cm
Jan. 13 Light freezing rain
Light freezing rain
 3° /-4° 0.1 mm 0 cm
Jan. 14 Partly cloudy
Partly cloudy
 6° /-5° 0 mm 0 cm
Jan. 15 Sunny
Sunny
 3° /-6° 0 mm 0 cm
Jan. 16 Cloudy
Cloudy
 2° /-7° 0 mm 0 cm
Jan. 17 Light freezing rain
Light freezing rain
 2° /-11° 0.9 mm 0.2 cm
Jan. 18 Light freezing rain
Light freezing rain
 -11° /-21° 0.4 mm 0 cm
Jan. 19 Sunny
Sunny
 2° /-3° 0 mm 0 cm
Jan. 20 Sunny
Sunny
 4° /-2° 0 mm 0 cm
Jan. 21 Partly cloudy
Partly cloudy
 3° /-2° 0 mm 0 cm
Jan. 22 Patchy rain possible
Patchy rain possible
 7° /0° 0.2 mm 0.1 cm
Jan. 23 Light freezing rain
Light freezing rain
 3° /-2° 0.2 mm 0.1 cm
Jan. 24 Overcast
Overcast
 4° /-1° 0 mm 0 cm
Jan. 25 Partly cloudy
Partly cloudy
 4° /-1° 0 mm 0 cm
Jan. 26 Partly cloudy
Partly cloudy
 7° /-1° 0 mm 0 cm
Jan. 27 Sunny
Sunny
 7° /1° 0 mm 0 cm
Jan. 28 Sunny
Sunny
 9° /1° 0 mm 0 cm
Jan. 29 Partly cloudy
Partly cloudy
 7° /1° 0 mm 0 cm
Jan. 30 Cloudy
Cloudy
 1° /1° 0 mm 0 cm
Jan. 31 Overcast
Overcast
 4° /-6° 0 mm 0 cm
Next
Important Notice
Our weather forecast for Lewis and Clark 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 Lewis and Clark County forecast closer to your planned date for the most up-to-date weather information.
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Lewis and Clark County in January - FAQ

What are the expected maximum and minimum temperatures in Lewis and Clark 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 Lewis and Clark County during January?

In January, Lewis and Clark County can expect light to moderate rainfall, totaling 42.1 mm across approximately 5 days. Occasional showers are possible, and planning ahead for them could be helpful.

Will it snow in Lewis and Clark County in January 2026?

Lewis and Clark County experiences an average snowfall of 17.8 cm during January, occurring over 9 days.

What are the typical wind conditions in Lewis and Clark County during January?

The average wind speed in Lewis and Clark County during January is 9 km/h, suggesting breezy to windy conditions, depending on your activities.

Lewis and Clark County snow forecast January 2026

Track daily snowfall levels and discover Lewis and Clark County’s snowy potential this January ❄️
On average, Lewis and Clark County sees 9 snowy days during January, with approximately 17.8 cm of total snowfall.

January rainfall patterns in Lewis and Clark County

Explore the daily rainfall trends and prepare for Lewis and Clark Countys January weather 💧
Typically, Lewis and Clark County has 5 rainy days in January with a total of 42.1 mm of rainfall.
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Helena
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Location coordinates Where is Lewis and Clark County?

Get accurate weather forecasts for Lewis and Clark County, located at latitude 46.593 and longitude -112.036. Stay updated with localized weather information tailored for Lewis and Clark County.

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