Monthly outlook for Sun Valley, ID: average high 52.4°, average low 35°. That is 2° above the climate normal for October. Precipitation is expected on 2 days (about 1.4 inches), against a normal of 4 days and 0.8 inches. The warmest day looks like 22 October (63°), the coolest 25 October (23.6°).
52.4°/35°
Average high / low
+2°
Above normal
2 / 4
Wet days / normal
1.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
22 October – 31 October
51.3°
50.3°
+0.6°
1 November – 10 November
54.1°
44.9°
+5.1°
11 November – 20 November
at normal
39.8°
—
October records over 66 years
82.6°1 October 2010All-time high
-2.9°28 October 1970All-time low
Climate normals and records are computed from the nearest reference point — Hailey (12 mi).
Fri, 2348° / 34°1.11
48 °
Sun Valley, Friday, 23 October
Rain. High 48°, low 34°.
Pressure29.83 inHg
Wind3.1 mph N
Humidity97%
Visibility1.5 mi
Dew point35°
Sat, 2447° / 24°0
47 °
Sun Valley, Saturday, 24 October
Clear. High 47°, low 24°.
Pressure30.18 inHg
Wind0.9 mph W
Humidity64%
Visibility6.2 mi
Dew point27°
Sun, 2547° / 24°0
47 °
Sun Valley, Sunday, 25 October
Clear. High 47°, low 24°.
Pressure30.12 inHg
Wind3.9 mph S
Humidity54%
Visibility6.2 mi
Dew point26°
Mon, 2649° / 26°0
49 °
Sun Valley, Monday, 26 October
Clear. High 49°, low 26°.
Pressure30.30 inHg
Wind4.1 mph S
Humidity57%
Visibility—
Dew point28°
Tue, 2752° / 30°0
52 °
Sun Valley, Tuesday, 27 October
Overcast. High 52°, low 30°.
Pressure30.24 inHg
Wind6.5 mph NE
Humidity46%
Visibility—
Dew point26°
Wed, 2854° / 36°0
54 °
Sun Valley, Wednesday, 28 October
Overcast. High 54°, low 36°.
Pressure30.21 inHg
Wind6.6 mph NE
Humidity35%
Visibility—
Dew point22°
Thu, 2955° / 38°0
55 °
Sun Valley, Thursday, 29 October
Clear. High 55°, low 38°.
Pressure29.94 inHg
Wind9.4 mph SW
Humidity40%
Visibility—
Dew point26°
Fri, 3051° / 37°0
51 °
Sun Valley, Friday, 30 October
Mostly clear. High 51°, low 37°.
Pressure29.71 inHg
Wind10.8 mph SW
Humidity49%
Visibility—
Dew point29°
Sat, 3148° / 33°0
48 °
Sun Valley, Saturday, 31 October
Clear. High 48°, low 33°.
Pressure29.77 inHg
Wind5.9 mph N
Humidity41%
Visibility—
Dew point20°
Sun, 0147° / 34°0
47 °
Sun Valley, Sunday, 1 November
Clear. High 47°, low 34°.
Pressure30.06 inHg
Wind6.8 mph N
Humidity34%
Visibility—
Dew point17°
Mon, 0250° / 35°0
50 °
Sun Valley, Monday, 2 November
Overcast. High 50°, low 35°.
Pressure30.33 inHg
Wind5.6 mph N
Humidity34%
Visibility—
Dew point18°
Tue, 0356° / 38°0
56 °
Sun Valley, Tuesday, 3 November
Clear. High 56°, low 38°.
Pressure30.21 inHg
Wind6.1 mph N
Humidity28%
Visibility—
Dew point18°
Wed, 0457° / 39°0
57 °
Sun Valley, Wednesday, 4 November
Clear. High 57°, low 39°.
Pressure29.94 inHg
Wind7.5 mph N
Humidity44%
Visibility—
Dew point30°
Thu, 0556° / 42°0
56 °
Sun Valley, Thursday, 5 November
Overcast. High 56°, low 42°.
Pressure30.00 inHg
Wind5.8 mph NW
Humidity64%
Visibility—
Dew point41°
Fri, 0658° / 46°0
58 °
Sun Valley, Friday, 6 November
Clear. High 58°, low 46°.
Pressure30.03 inHg
Wind5.1 mph S
Humidity48%
Visibility—
Dew point37°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 0745° / 27°0.04
45 °
Sun Valley, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high45°
Average low27°
Average precipitation0.04 in
Chance of precipitation25%
Record high61° (1999)
Record low6° (2015)
Sun, 0843° / 26°0.07
43 °
Sun Valley, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high43°
Average low26°
Average precipitation0.07 in
Chance of precipitation32%
Record high58° (1976)
Record low-6° (1994)
Mon, 0942° / 25°0.07
42 °
Sun Valley, Monday, 9 November
Climate normal for this date — 60-year average.
Average high42°
Average low25°
Average precipitation0.07 in
Chance of precipitation32%
Record high59° (2016)
Record low4° (2005)
Tue, 1042° / 24°0.04
42 °
Sun Valley, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high42°
Average low24°
Average precipitation0.04 in
Chance of precipitation25%
Record high61° (2016)
Record low-2° (1998)
Wed, 1142° / 23°0.06
42 °
Sun Valley, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high42°
Average low23°
Average precipitation0.06 in
Chance of precipitation30%
Record high59° (2016)
Record low-6° (1975)
Thu, 1242° / 23°0.05
42 °
Sun Valley, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high42°
Average low23°
Average precipitation0.05 in
Chance of precipitation27%
Record high60° (1999)
Record low-4° (1975)
Fri, 1341° / 23°0.07
41 °
Sun Valley, Friday, 13 November
Climate normal for this date — 60-year average.
Average high41°
Average low23°
Average precipitation0.07 in
Chance of precipitation27%
Record high60° (1999)
Record low0° (1961)
Sat, 1440° / 22°0.05
40 °
Sun Valley, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high40°
Average low22°
Average precipitation0.05 in
Chance of precipitation22%
Record high61° (1999)
Record low-7° (1994)
Sun, 1540° / 20°0.04
40 °
Sun Valley, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high40°
Average low20°
Average precipitation0.04 in
Chance of precipitation22%
Record high58° (1999)
Record low-3° (2005)
Mon, 1640° / 22°0.06
40 °
Sun Valley, Monday, 16 November
Climate normal for this date — 60-year average.
Average high40°
Average low22°
Average precipitation0.06 in
Chance of precipitation23%
Record high57° (1999)
Record low-12° (2014)
Tue, 1739° / 22°0.06
39 °
Sun Valley, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high39°
Average low22°
Average precipitation0.06 in
Chance of precipitation33%
Record high55° (2008)
Record low-5° (2000)
Wed, 1838° / 20°0.08
38 °
Sun Valley, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high38°
Average low20°
Average precipitation0.08 in
Chance of precipitation27%
Record high55° (2008)
Record low-3° (1964)
Thu, 1938° / 18°0.06
38 °
Sun Valley, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high38°
Average low18°
Average precipitation0.06 in
Chance of precipitation28%
Record high53° (2008)
Record low-10° (1985)
Fri, 2038° / 20°0.06
38 °
Sun Valley, Friday, 20 November
Climate normal for this date — 60-year average.
Average high38°
Average low20°
Average precipitation0.06 in
Chance of precipitation32%
Record high52° (1989)
Record low-7° (2011)
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.