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Lewis and Clark County (Helena)
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United States weather

10 day weather forecast for Lewis and Clark County

Sunday, July 19th, 2026, at 15:44
today
Sunny
33° 18°
tomorrow
Sunny
30° 14°
Tuesday
Sunny
30° 11°
Wednesday
Sunny
32° 15°
Thursday
Patchy rain possible
31° 17°
Friday
Sunny
37° 15°
Saturday
Sunny
38° 15°
 More Details See
more
Lewis and Clark County Weather Pages

Lewis and Clark County weather forecast

The weather forecast for Lewis and Clark County over the next 5 days indicates hot conditions with temperatures ranging from 30 °C to 33 °C.

Light rain is expected from Wednesday until Thursday.

Wind speeds are expected to be strong, averaging around 25 km/h.

Weather today
Lewis and Clark County weather forecast

Lewis and Clark County 14 days weather forecast

This weeks weather in Lewis and Clark County. Click on a date for detailed forecasts
Sun. 19
33°
18°
Sunny
0 mm
Mon. 20
30°
14°
Sunny
0 mm
Tue. 21
30°
11°
Sunny
0 mm
Wed. 22
32°
15°
Sunny
0.9 mm
Thu. 23
31°
17°
Patchy rain possible
0.5 mm
Fri. 24
37°
15°
Sunny
0 mm
Sat. 25
38°
15°
Sunny
0 mm
Sun. 26
35°
15°
Sunny
0 mm
Mon. 27
31°
10°
Sunny
0 mm
Tue. 28
34°
12°
Sunny
0 mm
Wed. 29
36°
13°
Sunny
0 mm
Thu. 30
37°
16°
Sunny
0 mm
Fri. 31
34°
11°
Sunny
0 mm
Sat. 1
35°
14°
Sunny
0 mm
Further Ahead
Select a date

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Access Lewis and Clark County weather forecasts with a simple click. Select any date for comprehensive insights on temperature, rainfall, and wind conditions.
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Lewis and Clark County long range weather forecast

30 day weather forecast for Lewis and Clark County
June
August
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Sunny
27°
2
Thundery outbreaks possible
27°
3
Moderate rain
27°
4
Overcast
25°
5
Fog
25°
6
Sunny
25°
7
Sunny
28°
8
Sunny
32°
9
Sunny
31°
10
Partly cloudy
28°
11
Partly cloudy
30°
12
Partly cloudy
32°
13
Sunny
32°
14
Sunny
32°
15
Overcast
22°
16
Mist
27°
17
Sunny
31°
18
Partly cloudy
30°
19
Sunny
33°
20
Sunny
30°
21
Sunny
30°
22
Sunny
32°
23
Patchy rain possible
31°
24
Sunny
37°
25
Sunny
38°
26
Sunny
35°
27
Sunny
31°
28
Sunny
34°
29
Sunny
36°
30
Sunny
37°
31
Sunny
34°
Important Notice
Our Lewis and Clark County long range weather forecast is based on historical data analysis rather than real-time forecasting models. While this provides a general outlook, weather conditions can change. We recommend checking the forecast closer to your planned date for the most current information.

Rain Forecast for the Next 14 Days in Lewis and Clark County

The chart displays the expected rainfall values (in mm) over the next 14 days in Lewis and Clark County, highlighting variations in precipitation levels for specific dates. ☔

Lewis and Clark County Wind Speed Forecast Chart

This chart illustrates the projected daily max wind speed (in km) in Lewis and Clark County over the next two weeks, providing insights into periods of increased or decreased wind activity. 🌀

Frequently asked questions about the weather in Lewis and Clark County

How warm is it in Lewis and Clark County over the next 14 days?
Over the next two weeks, temperatures in Lewis and Clark County are expected to range from around 10 °C on the coldest nights up to about 38 °C on the warmest days. Use this range to plan what to pack and wear.

Will it rain in Lewis and Clark County in the next two weeks?
Yes - rain is expected on about 2 of the next 14 days in Lewis and Clark County, with roughly 1.4 mm of rainfall in total. It is worth keeping an umbrella or raincoat handy.

How windy is it in Lewis and Clark County?
Maximum wind speeds in Lewis and Clark County are forecast to reach about 31 km/h at their peak over the next 14 days.

When is the best time to visit Lewis and Clark County?
For a month-by-month look at temperatures and rainfall, see our best time to visit Lewis and Clark County guide.

How accurate is the 14-day forecast for Lewis and Clark County?
Our Lewis and Clark County forecast uses leading meteorological models and is most reliable over the next few days. Long-range days beyond a week show general trends and can change, so check back closer to the date for updates.

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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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