Weather in Sun Valley, ID
Sun Valley, Wednesday, 21 October, 08:56
Overcast. Feels like 47°. High 64°, low 40°.
Monthly outlook for Sun Valley, ID: average high 47.3°, average low 31.6°. That is 1.1° below the climate normal for October. Precipitation is expected on 5 days (about 1.6 inches), against a normal of 3 days and 0.7 inches. The warmest day looks like 21 October (63.7°), the coolest 5 November (22.1°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 21 October – 30 October | 49.7° | 51° | -0.7° |
| 31 October – 9 November | 43.3° | 45.5° | -1.2° |
| 10 November – 19 November | at normal | 40.2° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Hailey (12 mi).
0.47
Sun Valley, Thursday, 22 October
Rain. High 63°, low 41°.
0.56
Sun Valley, Friday, 23 October
Snow. High 44°, low 32°.
0Sun Valley, Saturday, 24 October
Overcast. High 44°, low 30°.
0
Sun Valley, Sunday, 25 October
Clear. High 48°, low 26°.
0
Sun Valley, Monday, 26 October
Partly cloudy. High 48°, low 29°.
0.01Sun Valley, Tuesday, 27 October
Light rain. High 49°, low 32°.
0Sun Valley, Wednesday, 28 October
Overcast. High 45°, low 32°.
0Sun Valley, Thursday, 29 October
Overcast. High 50°, low 35°.
0.01Sun Valley, Friday, 30 October
Light snow. High 43°, low 34°.
0.06Sun Valley, Saturday, 31 October
Light snow. High 40°, low 25°.
0Sun Valley, Sunday, 1 November
Overcast. High 42°, low 27°.
0Sun Valley, Monday, 2 November
Overcast. High 47°, low 33°.
0Sun Valley, Tuesday, 3 November
Overcast. High 48°, low 33°.
0.01Sun Valley, Wednesday, 4 November
Light snow. High 46°, low 34°.
0.35Sun Valley, Thursday, 5 November
Snow. High 37°, low 22°.
0.07Sun Valley, Friday, 6 November
Climate normal for this date — 60-year average.
0.04Sun Valley, Saturday, 7 November
Climate normal for this date — 60-year average.
0.07Sun Valley, Sunday, 8 November
Climate normal for this date — 60-year average.
0.07Sun Valley, Monday, 9 November
Climate normal for this date — 60-year average.
0.04Sun Valley, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.06Sun Valley, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.05Sun Valley, Thursday, 12 November
Climate normal for this date — 60-year average.
0.07Sun Valley, Friday, 13 November
Climate normal for this date — 60-year average.
0.05Sun Valley, Saturday, 14 November
Climate normal for this date — 60-year average.
0.04Sun Valley, Sunday, 15 November
Climate normal for this date — 60-year average.
0.06Sun Valley, Monday, 16 November
Climate normal for this date — 60-year average.
0.06
Sun Valley, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.08Sun Valley, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.06Sun Valley, Thursday, 19 November
Climate normal for this date — 60-year average.
About the monthly outlook
How accurate is a 30-day forecast?
The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Sun Valley, ID are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
What does "above normal" mean?
We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.
Where do the 66-year records come from?
They are real temperature extremes recorded in Sun Valley, ID since 1960: the highest and lowest reading for each calendar date, with the year it happened.
How often is it updated?
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.
Sun and moon today
Weather history
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