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Lewis and Clark County (Helena)
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United States weather

Weather in Lewis and Clark County, Montana for March 2026

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

    Snow Forecast ❄️

  • With an average of 3 snowy days, Lewis and Clark County usually enjoys a light touch of snow in March.

    • Temperatures

  • In general, the average temperature in Lewis and Clark County at the beginning of March is 3.4 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 12 °F by the end of March.

    • Rain 🌧️

  • The climate of Lewis and Clark County in March is notably wet, with an average of 13 rainy days, and a total of 57 mm of precipitation.

    • More

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

Average dry days
15
Dry days
Average rainy days
13
Rainy days
Average snowy days
3
Snow days
Average temperatures
8°/-2°
Temperatures
Average wind speed
17 km/h
Avg max wind
Average humidity
71 %
Avg humidity

Lewis and Clark County Weather March

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

Temperatures trend during March in Lewis and Clark County

See the weather trend as well as the moving average line

March weather in Lewis and Clark County day by day

Click on a date for more information
February April
Date Weather Temperatures Rain Snow More
Mar. 1 Cloudy
Cloudy
 8° /-5° 0 mm 0 cm
Mar. 2 Overcast
Overcast
 6° /-8° 0 mm 0 cm
Mar. 3 Light freezing rain
Light freezing rain
 0° /-1° 1.4 mm 0 cm
Mar. 4 Light freezing rain
Light freezing rain
 1° /-3° 1.1 mm 0 cm
Mar. 5 Partly cloudy
Partly cloudy
 3° /-5° 0 mm 0 cm
Mar. 6 Overcast
Overcast
 1° /-3° 0 mm 0 cm
Mar. 7 Overcast
Overcast
 5° /-7° 0 mm 0 cm
Mar. 8 Overcast
Overcast
 7° /-5° 0 mm 0 cm
Mar. 9 Partly cloudy
Partly cloudy
 13° /-2° 0 mm 0 cm
Mar. 10 Moderate rain at times
Moderate rain at times
 7° /-2° 1.5 mm 0 cm
Mar. 11 Patchy rain possible
Patchy rain possible
 8° /-1° 0.7 mm 0 cm
Mar. 12 Overcast
Overcast
 13° /0° 0 mm 0 cm
Mar. 13 Moderate or heavy rain shower
Moderate or heavy rain shower
 7° /0° 7.3 mm 0 cm
Mar. 14 Moderate rain at times
Moderate rain at times
 4° /-4° 0.9 mm 0 cm
Mar. 15 Moderate or heavy rain shower
Moderate or heavy rain shower
 6° /-5° 1.8 mm 0 cm
Mar. 16 Patchy rain possible
Patchy rain possible
 9° /0° 3.7 mm 0 cm
Mar. 17 Moderate or heavy rain shower
Moderate or heavy rain shower
 7° /-1° 4.8 mm 0 cm
Mar. 18 Cloudy
Cloudy
 3° /-4° 0 mm 0 cm
Mar. 19 Overcast
Overcast
 8° /-6° 0 mm 0 cm
Mar. 20 Patchy rain possible
Patchy rain possible
 5° /-2° 0.4 mm 0 cm
Mar. 21 Overcast
Overcast
 10° /-2° 0 mm 0 cm
Mar. 22 Overcast
Overcast
 4° /-1° 1.1 mm 0.4 cm
Mar. 23 Patchy rain possible
Patchy rain possible
 7° /-2° 0.3 mm 0 cm
Mar. 24 Patchy rain possible
Patchy rain possible
 12° /4° 0.2 mm 0 cm
Mar. 25 Cloudy
Cloudy
 17° /5° 0 mm 0 cm
Mar. 26 Partly cloudy
Partly cloudy
 17° /0° 0 mm 0 cm
Mar. 27 Overcast
Overcast
 19° /2° 0 mm 0 cm
Mar. 28 Cloudy
Cloudy
 12° /1° 0.5 mm 0 cm
Mar. 29 Overcast
Overcast
 7° /0° 0.5 mm 0 cm
Mar. 30 Heavy snow
Heavy snow
 4° /-1° 17 mm 12.3 cm
Mar. 31 Moderate or heavy rain with thunder
Moderate or heavy rain with thunder
 8° /-3° 13.8 mm 6 cm
Next
Important Notice
Our weather forecast for Lewis and Clark County in March 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 March - FAQ

What are the expected maximum and minimum temperatures in Lewis and Clark County during March?
Prepare for cooler days with highs just around 8° and colder nights, dipping below -2°.
How much rainfall should be expected in Lewis and Clark County during March?
Moderate rainfall is anticipated in Lewis and Clark County during March, with a total of 57 mm spread over approximately 13 days. Considering plans for rainy days is advisable.
Will it snow in Lewis and Clark County in March 2026?
Lewis and Clark County experiences an average snowfall of 18.7 cm during March, occurring over 3 days.
What are the typical wind conditions in Lewis and Clark County during March?
The average wind speed in Lewis and Clark County during March is 17 km/h, suggesting breezy to windy conditions, depending on your activities.

Lewis and Clark County snow forecast March 2026

Track daily snowfall levels and discover Lewis and Clark County’s snowy potential this March ❄️
On average, Lewis and Clark County sees 3 snowy days during March, with approximately 18.7 cm of total snowfall.

March rainfall patterns in Lewis and Clark County

Explore the daily rainfall trends and prepare for Lewis and Clark Countys March weather 💧
Typically, Lewis and Clark County has 13 rainy days in March with a total of 57 mm of rainfall.
Top locations in Lewis and Clark County
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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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