Salmon, ID Weather

Lemhi County3:01 AM MDT45.18°N, 113.90°WElevation 3,944 ft

Current conditions

Clear
37°
Clear
Feels like 37°
High 68°·Low 35° tonight
WindCalm
Humidity87%
Dew point34°
Pressure30.18 inHg
Visibility10 mi
Cloud cover11%
UV index0 Low
Sunrise8:00 AM
Sunset6:42 PM

Observed at Salmon, Lemhi County Airport · 36 min ago

Forecast

10-day

  • Overnight

    Patchy fog after 4am. Mostly clear, with a low around 35. Wind around 0 mph.

  • Wednesday

    Areas of fog before 10am. Sunny, with a high near 68. South wind 0 to 3 mph.

  • Wednesday Night

    Partly cloudy, with a low around 37. South southeast wind around 2 mph.

National Weather Service forecast updated 1 hr ago.

Hourly

Hourly forecast
  1. Now Mostly Clear 38°
  2. 4 AM Patchy Fog 37°
  3. 5 AM Patchy Fog 36°
  4. 6 AM Areas Of Fog 36°
  5. 7 AM Areas Of Fog 35°
  6. 8 AM Areas Of Fog 35°
  7. 9 AM Areas Of Fog 38°
  8. 10 AM Mostly Sunny 46°
  9. 11 AM Sunny 52°
  10. 12 PM Sunny 56°
  11. 1 PM Sunny 61°
  12. 2 PM Sunny 64°
  13. 3 PM Sunny 66°
  14. 4 PM Sunny 68°
  15. 5 PM Sunny 66°
  16. 6 PM Partly Cloudy 65°
  17. 7 PM Partly Cloudy 60°
  18. 8 PM Mostly Cloudy 53°
  19. 9 PM Mostly Cloudy 50°
  20. 10 PM Mostly Clear 48°
  21. 11 PM Mostly Clear 46°
  22. Thu12 AM Mostly Clear 44°
  23. 1 AM Mostly Clear 43°
  24. 2 AM Clear 42°

10-day forecast

Details
  1. TonightOct 20 Patchy Fog Patchy Fog35°
  2. TodayOct 21 Areas Of Fog then Sunny Areas Of Fog then Sunny37°68°
  3. ThuOct 22 Patchy Fog then Mostly Sunny Patchy Fog then Mostly Sunny90%37°69°
  4. FriOct 23 Light Rain Light Rain97%23°49°
  5. SatOct 24 Mostly Sunny Mostly Sunny23°51°
  6. SunOct 25 Mostly Sunny Mostly Sunny25°57°
  7. MonOct 26 Mostly Sunny Mostly Sunny20%25°57°
  8. TueOct 27 Slight Chance Rain And Snow then Mostly Sunny Slight Chance Rain And Snow then Mostly Sunny21%55°
  9. WedOct 28 Partly cloudy Partly cloudy40°60°
  10. ThuOct 29 Cloudy Cloudy42°59°

Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.

Radar

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Weather news near Salmon

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Air quality

46
Good
Fine particles (PM2.5)

Air quality is satisfactory, and air pollution poses little or no risk.

Forecast

  • WedGood (33)
  • ThuGood (30)
  • FriGood (32)

Salmon, ID reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.

Sun & moon

Sunrise 8:00 AM
Sunset 6:42 PM
Daylight 10 h 41 min (−2 min 59 s tomorrow)
Waxing Gibbous · 76% lit
Moonrise 4:35 PM Moonset 2:53 AM
Full moon Oct 26 New moon Nov 9

Almanac

Monthly
Record high80° (1915)
Record low14° (1945)
Wettest0.35 in (1914)
Month to date0.59 in (normal 0.00 in)

Salmon Lemhi County Ap, records since 1905. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).

Forecasters' discussion

From the National Weather Service office in MSO, issued 15 hrs ago

Discussion

KEY MESSAGES:

- Mild daytime temperatures through Thursday.

- Patchy valley fog around sunrise each morning.

- Significant weather change coming Friday into the weekend.

A broad ridge of high pressure will continue to bring mild daytime temperatures across the Northern Rockies through Thursday. Stable conditions under the ridge are promoting the development of daily valley inversions and trapped cold air, with patchy dense fog. Afternoon temperatures will continue to run 10 to 15 degrees above normal for this time of year. Forecast models suggest a few isolated showers developing over Lemhi County this afternoon, then over southwest and west-central Montana tomorrow afternoon and evening.

Expect a significant change as a low pressure system and cold front track across the region Thursday night into Friday. The front will bring wind gusts around 20 mph in Idaho and 20 to 35 mph across most of western Montana on Friday. Moisture with this system will move north from the Great Basin, with precipitation focusing along and south of the I-90 corridor and along the Continental Divide in northwest Montana. Most of the precipitation will fall as rain ahead of the cold front, limiting the potential for winter weather impacts. Snow levels will fall to around 5,000 feet Friday and lower over the weekend as shower activity begins to decrease. Therefore, forecast snow amounts will be generally under an inch across the region and above 5,000 feet. The exception is the higher elevations of the Flathead National Forest and Glacier National Park, which will likely pick up several inches of snow this weekend.

Aviation

Stable conditions will continue today under a ridge of high pressure. Valley inversions and cold air pools will set the stage for areas of valley fog, particularly near large bodies of water and river systems. The primary period to watch will be from 21/1200-1500Z, including Terminal KMSO. Fog can not be ruled out at KGPI as well, but the probability of impacts is less than 10 percent as high cloud cover has reduced overnight cooling.

Mso Watches

MT...None. ID...None.

Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Conservative index and reflects what the press published. Terms of use.