Monthly outlook for Long Valley, SD: average high 58.9°, average low 42.5°. That is 2° above the climate normal for October. Precipitation is expected on 2 days (about 0.7 inches), against a normal of 3 days and 0.6 inches. The warmest day looks like 23 October (82°), the coolest 5 November (32.5°).
58.9°/42.5°
Average high / low
+2°
Above normal
2 / 3
Wet days / normal
0.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
21 October – 30 October
60.4°
57.1°
+1.8°
31 October – 9 November
56.3°
51.2°
+2.9°
10 November – 19 November
at normal
46.8°
—
October records over 66 years
93.6°4 October 1963All-time high
-2.9°30 October 1991All-time low
Climate normals and records are computed from the nearest reference point — Wanblee (11 mi).
Thu, 2279° / 53°0
79 °
Long Valley, Thursday, 22 October
Mostly clear. High 79°, low 53°.
Pressure29.97 inHg
Wind14.3 mph S
Humidity46%
Visibility6.2 mi
Dew point54°
Fri, 2382° / 60°0
82 °
Long Valley, Friday, 23 October
Overcast. High 82°, low 60°.
Pressure29.71 inHg
Wind18.3 mph S
Humidity46%
Visibility6.2 mi
Dew point55°
Sat, 2461° / 46°0.07
61 °
Long Valley, Saturday, 24 October
Light rain. High 61°, low 46°.
Pressure30.33 inHg
Wind15.1 mph N
Humidity64%
Visibility6.2 mi
Dew point36°
Sun, 2547° / 41°0.6
47 °
Long Valley, Sunday, 25 October
Rain. High 47°, low 41°.
Pressure30.36 inHg
Wind10.4 mph NE
Humidity92%
Visibility4.4 mi
Dew point40°
Mon, 2641° / 38°0
41 °
Long Valley, Monday, 26 October
Overcast. High 41°, low 38°.
Pressure30.47 inHg
Wind13.5 mph N
Humidity77%
Visibility—
Dew point32°
Tue, 2761° / 38°0
61 °
Long Valley, Tuesday, 27 October
Partly cloudy. High 61°, low 38°.
Pressure30.06 inHg
Wind13 mph S
Humidity58%
Visibility—
Dew point37°
Wed, 2851° / 41°0
51 °
Long Valley, Wednesday, 28 October
Partly cloudy. High 51°, low 41°.
Pressure30.18 inHg
Wind19.8 mph N
Humidity44%
Visibility—
Dew point28°
Thu, 2956° / 39°0
56 °
Long Valley, Thursday, 29 October
Overcast. High 56°, low 39°.
Pressure30.21 inHg
Wind12.6 mph S
Humidity30%
Visibility—
Dew point20°
Fri, 3058° / 45°0
58 °
Long Valley, Friday, 30 October
Overcast. High 58°, low 45°.
Pressure29.74 inHg
Wind23 mph S
Humidity61%
Visibility—
Dew point41°
Sat, 3165° / 50°0
65 °
Long Valley, Saturday, 31 October
Mostly clear. High 65°, low 50°.
Pressure29.44 inHg
Wind21.9 mph S
Humidity40%
Visibility—
Dew point37°
Sun, 0150° / 39°0
50 °
Long Valley, Sunday, 1 November
Clear. High 50°, low 39°.
Pressure30.12 inHg
Wind20.1 mph NW
Humidity46%
Visibility—
Dew point27°
Mon, 0258° / 38°0
58 °
Long Valley, Monday, 2 November
Partly cloudy. High 58°, low 38°.
Pressure30.15 inHg
Wind10.6 mph S
Humidity34%
Visibility—
Dew point24°
Tue, 0354° / 40°0
54 °
Long Valley, Tuesday, 3 November
Overcast. High 54°, low 40°.
Pressure30.15 inHg
Wind6.5 mph N
Humidity36%
Visibility—
Dew point25°
Wed, 0452° / 35°0
52 °
Long Valley, Wednesday, 4 November
Overcast. High 52°, low 35°.
Pressure29.94 inHg
Wind5.4 mph NE
Humidity39%
Visibility—
Dew point23°
Thu, 0559° / 32°0
59 °
Long Valley, Thursday, 5 November
Clear. High 59°, low 32°.
Pressure29.56 inHg
Wind9.7 mph NW
Humidity30%
Visibility—
Dew point19°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 0651° / 33°0.04
51 °
Long Valley, Friday, 6 November
Climate normal for this date — 60-year average.
Average high51°
Average low33°
Average precipitation0.04 in
Chance of precipitation18%
Record high78° (2020)
Record low2° (1991)
Sat, 0751° / 32°0.04
51 °
Long Valley, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high51°
Average low32°
Average precipitation0.04 in
Chance of precipitation15%
Record high77° (1999)
Record low-1° (1991)
Sun, 0850° / 33°0.07
50 °
Long Valley, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high50°
Average low33°
Average precipitation0.07 in
Chance of precipitation18%
Record high79° (1999)
Record low10° (2000)
Mon, 0946° / 31°0.06
46 °
Long Valley, Monday, 9 November
Climate normal for this date — 60-year average.
Average high46°
Average low31°
Average precipitation0.06 in
Chance of precipitation22%
Record high73° (2016)
Record low6° (2000)
Tue, 1047° / 28°0.04
47 °
Long Valley, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high47°
Average low28°
Average precipitation0.04 in
Chance of precipitation18%
Record high69° (2005)
Record low-4° (1986)
Wed, 1145° / 29°0.03
45 °
Long Valley, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high45°
Average low29°
Average precipitation0.03 in
Chance of precipitation22%
Record high72° (2005)
Record low-3° (1986)
Thu, 1248° / 29°0.04
48 °
Long Valley, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high48°
Average low29°
Average precipitation0.04 in
Chance of precipitation15%
Record high71° (1999)
Record low-14° (1986)
Fri, 1348° / 30°0.04
48 °
Long Valley, Friday, 13 November
Climate normal for this date — 60-year average.
Average high48°
Average low30°
Average precipitation0.04 in
Chance of precipitation20%
Record high73° (2025)
Record low-19° (1986)
Sat, 1447° / 31°0.02
47 °
Long Valley, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high47°
Average low31°
Average precipitation0.02 in
Chance of precipitation10%
Record high74° (2025)
Record low6° (1985)
Sun, 1547° / 29°0.02
47 °
Long Valley, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high47°
Average low29°
Average precipitation0.02 in
Chance of precipitation15%
Record high70° (1963)
Record low3° (2014)
Mon, 1649° / 29°0.02
49 °
Long Valley, Monday, 16 November
Climate normal for this date — 60-year average.
Average high49°
Average low29°
Average precipitation0.02 in
Chance of precipitation8%
Record high70° (2001)
Record low-1° (2014)
Tue, 1746° / 29°0.02
46 °
Long Valley, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high46°
Average low29°
Average precipitation0.02 in
Chance of precipitation25%
Record high69° (1999)
Record low-6° (2000)
Wed, 1847° / 29°0.04
47 °
Long Valley, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high47°
Average low29°
Average precipitation0.04 in
Chance of precipitation18%
Record high69° (2008)
Record low0° (2014)
Thu, 1944° / 29°0.03
44 °
Long Valley, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high44°
Average low29°
Average precipitation0.03 in
Chance of precipitation18%
Record high66° (1989)
Record low2° (1985)
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 Long Valley, SD 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 Long Valley, SD 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.