Lewis and Clark County, MT Weather Forecast
County weather hub
Rain Showers
Compare major city weather across Lewis and Clark County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Rain showers. Partly sunny, with a high near 61. West southwest wind 7 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 80%.
County Weather Overview
This county weather page brings together forecast coverage for Lewis and Clark County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 1 of 1 mapped cities in Lewis and Clark County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Apr 11 to Apr 15, 2026
- Latest sync
- Apr 9, 2026 4:45 PM MDT
- Forecast office
- TFX
- Source
- NOAA / NWS
Daily Outlook
This Week in Lewis and Clark County
Saturday looks like the warmest upcoming period in Lewis and Clark County at 61 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 25 degrees F.
The strongest winds are forecast for Tuesday Night at about 18 to 26 mph WSW.
Precipitation is mentioned in 10 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 9, 2026 4:45 PM MDT
- Coverage
- 6 days
- Time zone
- America/Denver
- Forecast office
- TFX
- Radar station
- KTFX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Rain showers likely. Mostly cloudy, with a low around 37. West southwest wind 10 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.
A chance of rain and snow showers before noon, then showers and thunderstorms. Partly sunny, with a high near 50. South southeast wind around 10 mph, with gusts as high as 20 mph.
Rain before midnight, then rain and snow likely. Cloudy, with a low around 34. North northwest wind around 10 mph, with gusts as high as 18 mph.
Snow before 3pm, then rain and snow. Cloudy, with a high near 45.
A chance of rain and snow before midnight. Mostly cloudy, with a low around 32.
A slight chance of snow. Mostly sunny, with a high near 45.
A slight chance of snow after midnight. Mostly cloudy, with a low around 31.
Snow likely. Mostly cloudy, with a high near 42. New snow accumulation of less than one inch possible.
Snow likely. Mostly cloudy, with a low around 25. New snow accumulation of 1 to 3 inches possible.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Apr 11
|
Rain Showers
|
61°F |
7 to 14 mph
WSW
|
|
Saturday Night
Apr 11
|
Rain Showers Likely
|
37°F |
10 to 14 mph
WSW
|
|
Sunday
Apr 12
|
Chance Rain And Snow Showers then Showers And Thunderstorms
|
50°F |
10 mph
SSE
|
|
Sunday Night
Apr 12
|
Rain then Rain And Snow Likely
|
34°F |
10 mph
NNW
|
|
Monday
Apr 13
|
Light Snow
|
45°F |
8 to 12 mph
W
|
|
Monday Night
Apr 13
|
Chance Rain And Snow then Mostly Cloudy
|
32°F |
14 mph
WSW
|
|
Tuesday
Apr 14
|
Slight Chance Light Snow
|
45°F |
15 to 24 mph
WSW
|
|
Tuesday Night
Apr 14
|
Mostly Cloudy then Slight Chance Light Snow
|
31°F |
18 to 26 mph
WSW
|
|
Wednesday
Apr 15
|
Light Snow Likely
|
42°F |
18 to 23 mph
WSW
|
|
Wednesday Night
Apr 15
|
Snow Likely
|
25°F |
14 to 23 mph
WSW
|
Major City Forecasts
Live forecast snapshots for major cities across Lewis and Clark County.
Coverage
Forecast coverage currently spans 1 of 1 mapped cities in Lewis and Clark County.
Largest mapped city population in this region: 33,737.
