Sun Valley, Idaho Weather Conditions

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Current Conditions

  • 76°
  • Partly Cloudy
  • Wind: North 6 mph
  • Humidity: 27%
  • Visibility: N/A
  • Dew Point: 40°
  • Pressure: 29.86 in. -

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Next 12 Hours

3  pm
6  pm
9  pm
12  am
3  am
Thunderstorm
T-storms
Partly Cloudy
Partly Cloudy
Clear
Clear
Clear
Clear
Clear
Clear
77°
77°
57°
48°
41°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Tuesday
  • Thunderstorm
  • High: 82 °
  • Low: 36 °
  • Thunderstorm
  • Wednesday
  • Chance of a Thunderstorm
  • High: 81 °
  • Low: 43 °
  • Chance of a Thunderstorm
  • Thursday
  • Chance of a Thunderstorm
  • High: 73 °
  • Low: 28 °
  • Chance of T-Storms
  • Friday
  • Partly Cloudy
  • High: 68 °
  • Low: 32 °
  • Partly Cloudy
  • Saturday
  • Fog
  • High: 77 °
  • Low: 30 °
  • Fog

Forecast for Sun Valley, Idaho

Updated: 3:00 PM MDT on September 16, 2014

  • Tuesday

    Partly cloudy with thunderstorms and rain showers in the afternoon. High of 82F. Winds less than 5 mph. Chance of rain 20%.

  • Tuesday Night

    Partly cloudy in the evening, then clear. Low of 36F. Winds from the SSW at 5 to 15 mph.

  • Wednesday

    Partly cloudy with a chance of a thunderstorm and a chance of rain in the afternoon. High of 81F. Winds from the South at 5 to 15 mph. Chance of rain 20%.

  • Wednesday Night

    Partly cloudy with a chance of a thunderstorm and a chance of rain, then a chance of rain after midnight. Low of 43F. Winds less than 5 mph. Chance of rain 30%.

  • Thursday

    Partly cloudy with a chance of rain, then a chance of a thunderstorm and a chance of rain in the afternoon. High of 73F. Winds less than 5 mph. Chance of rain 30%.

  • Thursday Night

    Partly cloudy with a chance of a thunderstorm and a chance of snow in the evening, then clear. Low of 28F. Winds from the WSW at 5 to 10 mph.

  • Friday

    Partly cloudy in the morning, then overcast. Fog early. High of 68F. Winds from the West at 5 to 10 mph.

  • Friday Night

    Partly cloudy. Fog overnight. Low of 32F. Winds from the NW at 5 to 10 mph shifting to the NE after midnight.

  • Saturday

    Partly cloudy. Fog early. High of 77F. Winds less than 5 mph.

  • Saturday Night

    Clear. Fog overnight. Low of 30F. Winds less than 5 mph.

  • Sunday

    Clear. Fog early. High of 77F. Winds less than 5 mph.

  • Sunday Night

    Clear. Low of 30F. Winds less than 5 mph.

  • Monday

    Clear. High of 77F. Winds less than 5 mph.

  • Monday Night

    Clear. Low of 30F. Winds from the WSW at 5 to 10 mph.

  • Tuesday

    Partly cloudy. High of 70F. Winds less than 5 mph.

  • Tuesday Night

    Partly cloudy. Low of 34F. Winds less than 5 mph.

  • Wednesday

    Clear. High of 79F. Winds less than 5 mph.

  • Wednesday Night

    Clear. Low of 34F. Winds less than 5 mph.

  • Thursday

    Clear. High of 73F. Winds less than 5 mph.

  • Thursday Night

    Clear. Low of 28F. Winds less than 5 mph.

  • Friday

    Clear. High of 72F. Winds less than 5 mph.

  • Friday Night

    Clear. Fog overnight. Low of 28F. Winds less than 5 mph.

  • Saturday

    Clear. Fog early. High of 72F. Winds less than 5 mph.

  • Saturday Night

    Clear. Low of 28F. Winds from the WNW at 5 to 10 mph.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: RAWS SAWTOOTH PORTABLE #2 ID US, Sun Valley, ID

Updated: 3:04 PM MDT

Temperature: 74 °F Dew Point: 34 °F Humidity: 23% Wind: SE at 11 mph Pressure: - Hourly Precipitation: 0.00 in Heat Index: 76 °F Graphs

Location: RAWS COPPER BASIN ID US, Mackay, ID

Updated: 2:50 PM MDT

Temperature: 73 °F Dew Point: 34 °F Humidity: 24% Wind: ESE at 13 mph Pressure: - Hourly Precipitation: 0.00 in Heat Index: 76 °F Graphs

Location: RAWS NORTH FORK ID US, Ketchum, ID

Updated: 2:39 PM MDT

Temperature: 84 °F Dew Point: 34 °F Humidity: 17% Wind: SE at 6 mph Pressure: - Hourly Precipitation: 0.00 in Heat Index: 81 °F Graphs

Location: Sun Valley Resort, Sun Valley, ID

Updated: 3:26 PM MDT

Temperature: 81.1 °F Dew Point: 42 °F Humidity: 25% Wind: SE at 4.0 mph Pressure: 29.12 in Hourly Precipitation: 0.00 in Heat Index: 80 °F Graphs

Location: RAWS OHIO GULCH ID US, Hailey, ID

Updated: 2:44 PM MDT

Temperature: 82 °F Dew Point: 34 °F Humidity: 18% Wind: SSW at 11 mph Pressure: - Hourly Precipitation: 0.00 in Heat Index: 80 °F Graphs

Location: HADS KETCHUM RANGER STATION NEAR KETC ID US USBR, Ketchum, ID

Updated: 2:45 PM MDT

Temperature: 80 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Heat Index: 78 °F Graphs

Location: MesoWest SUN VALLEY-BALD MTN (1 HOUR) ID US SNOWNET, Ketchum, ID

Updated: 3:00 PM MDT

Temperature: 67 °F Dew Point: 33 °F Humidity: 28% Wind: SSE at 14 mph Pressure: 30.14 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: East Fork, Hailey, ID

Updated: 3:26 PM MDT

Temperature: 80.4 °F Dew Point: 39 °F Humidity: 23% Wind: ENE at 4.0 mph Pressure: 30.08 in Hourly Precipitation: 0.00 in Heat Index: 79 °F Graphs

Location: HADS HAILEY RANGER STATION AT HAILEY ID US USBR, Hailey, ID

Updated: 2:45 PM MDT

Temperature: 85 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Heat Index: 82 °F Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion




Area forecast discussion 
National Weather Service Pocatello Idaho 
155 PM MDT Tuesday Sep 16 2014 


Short term...tonight through Friday. Satellite imagery was showing 
a broad low pressure center spinning off the northern California coast 
early this afternoon with a downstream ridge positioned over eastern 
Idaho. Much further south...the remnants of Hurricane Odile were 
visible rotating NE across the Gulf of California...east of the 
previous forecast track. The GFS/NAM were both showing isolated 
convection developing across the region this afternoon as weak 
disturbances eject from the low off the coast and rotate through the 
ridge. A few cells may prevail through the night...but both models 
were much less enthused about the potential for convective activity 
compared to yesterdays model runs. The ridge is expected to amplify 
some and shift east into The Divide Wednesday. One would expect an 
increasing potential for convective activity...but both the GFS and 
NAM were showing just isolated ill organized convective activity in 
the absence of any well defined dynamical support. The models show 
the upper trough shifting into the coast Thursday morning with the 
associated upper jet lifting NE through eastern Oregon/north Idaho with 
enough lift to support a broad band of convection across south-central 
Idaho which expands ewrd during the day as the upper trough 
continues to push inland. The development of a surface front which 
advances into/through southeast Idaho should also help to promote active 
convection throughout the day. It still remains uncertain as to 
whether any moisture from Odile will be swept northward in the deep 
southerly fetch ahead of the trough. The NAM appears to support this 
idea while the GFS keeps the moisture well to the south. With the 
remnants of Odile tracking further east of previous forecasts...I am 
leaning in the direction of the GFS solution. As the upper trough 
progresses further inland Thursday night...a definitive split occurs 
with the northern branch of the trough pushing fairly rapidly east along 
the Canadian high-line while the southern extent of the trough spins off 
a closed low over northern California (a bit further north than 
yesterdays progs). The northerly placement of the cut-off low 
combined with the surface frontal boundary positioned just to our 
south have resulted in a broad area of precipitation developing in 
the models and extending from NE Nevada across the southeast Highlands 
Thursday night. Have generally boosted the precipitation potential 
during this time frame but with low confidence due to run to run 
model inconsistencies. By Friday...the tail end of the northern branch 
trough sweeps through the area with a drier northwest flow overspreading 
the region. Huston 


Long term...Friday night through next Tuesday. As was the case 
yesterday...the models continue to struggle with the position and 
track of the cut-off low floundering over California early in the 
period. The latest 12z GFS lifts the low east-northeast across Nevada Sunday 
and northern Utah Sunday night with accompanying precipitation clipping 
the far southeast Highlands late Sunday night/Monday followed by a return 
to dry conditions as the ridge rebounds across the area. The European model (ecmwf) 
on the other hand...retrogrades the low off the coast Sunday where 
it remains until being swept inland across California Monday and 
into northern Nevada Tuesday. With poor model consistency...have 
generally maintained the going forecast which favors the GFS 
timing/track. Will await better consensus in the models before 
trying to nail down any changes in this time frame. Huston 
&& 


Aviation...a weak shortwave pushing through upper ridge is helping 
trigger some showers over the region. Instability continuing through 
this afternoon may keep showers more active for pih and Ida...but 
looks like this will be mainly focused over the mountains. Local WRF 
and hrrr models influenced forecast as they suggest earlier end of 
precipitation over Ida versus the 12z NAM. All sites should remain VFR 
through period. Hinsberger 
&& 


Fire weather...showers and isolated thunderstorms will continue 
mainly over the central and eastern mountains through this evening. 
Expect re-development of thunderstorms again Wednesday afternoon as 
a deep upper trough channels more moisture into southeast Idaho. 
Moisture transport peaks on Thursday as the upper trough and surface 
cold front push into the region. This will mean increased 
thunderstorm coverage for Thursday afternoon. Storms will bring 
locally heavy rainfall with the focus being over the southeastern 
Highlands. Drier weather is expected by Friday afternoon and should 
last through the weekend. Hinsberger 
&& 


Pih watches/warnings/advisories...none. 
&& 


$$ 



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