Monthly outlook for Long Valley, SD: average high 59.4°, average low 44.2°. That is 2.3° above the climate normal for October. Precipitation is expected on 5 days (about 1.4 inches), against a normal of 3 days and 0.6 inches. The warmest day looks like 23 October (83.1°), the coolest 29 October (32.3°).
59.4°/44.2°
Average high / low
+2.3°
Above normal
5 / 3
Wet days / normal
1.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
21 October – 30 October
59.6°
57.1°
+1.4°
31 October – 9 November
58.9°
51.2°
+4.3°
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° / 51°0
79 °
Long Valley, Thursday, 22 October
Partly cloudy. High 79°, low 51°.
Pressure29.97 inHg
Wind14.7 mph S
Humidity44%
Visibility6.2 mi
Dew point53°
Fri, 2383° / 59°0.01
83 °
Long Valley, Friday, 23 October
Light rain. High 83°, low 59°.
Pressure29.68 inHg
Wind17.4 mph S
Humidity43%
Visibility6.2 mi
Dew point54°
Sat, 2462° / 45°0.22
62 °
Long Valley, Saturday, 24 October
Rain. High 62°, low 45°.
Pressure30.36 inHg
Wind14.6 mph NW
Humidity63%
Visibility3.6 mi
Dew point36°
Sun, 2547° / 39°0.56
47 °
Long Valley, Sunday, 25 October
Rain. High 47°, low 39°.
Pressure30.36 inHg
Wind10.8 mph NE
Humidity94%
Visibility2.9 mi
Dew point40°
Mon, 2642° / 36°0
42 °
Long Valley, Monday, 26 October
Overcast. High 42°, low 36°.
Pressure30.47 inHg
Wind11.4 mph N
Humidity71%
Visibility—
Dew point31°
Tue, 2744° / 36°0
44 °
Long Valley, Tuesday, 27 October
Overcast. High 44°, low 36°.
Pressure30.30 inHg
Wind12.5 mph NW
Humidity77%
Visibility—
Dew point35°
Wed, 2848° / 33°0
48 °
Long Valley, Wednesday, 28 October
Clear. High 48°, low 33°.
Pressure30.42 inHg
Wind14.7 mph NW
Humidity51%
Visibility—
Dew point26°
Thu, 2954° / 32°0
54 °
Long Valley, Thursday, 29 October
Overcast. High 54°, low 32°.
Pressure30.24 inHg
Wind21.8 mph S
Humidity42%
Visibility—
Dew point26°
Fri, 3066° / 45°0
66 °
Long Valley, Friday, 30 October
Clear. High 66°, low 45°.
Pressure29.80 inHg
Wind20.6 mph S
Humidity31%
Visibility—
Dew point28°
Sat, 3167° / 48°0
67 °
Long Valley, Saturday, 31 October
Overcast. High 67°, low 48°.
Pressure29.83 inHg
Wind9 mph SW
Humidity29%
Visibility—
Dew point29°
Sun, 0155° / 51°0.24
55 °
Long Valley, Sunday, 1 November
Light rain. High 55°, low 51°.
Pressure29.94 inHg
Wind15.7 mph SE
Humidity91%
Visibility—
Dew point51°
Mon, 0253° / 51°0.24
53 °
Long Valley, Monday, 2 November
Light rain. High 53°, low 51°.
Pressure30.06 inHg
Wind8.6 mph N
Humidity95%
Visibility—
Dew point50°
Tue, 0356° / 45°0.1
56 °
Long Valley, Tuesday, 3 November
Light rain. High 56°, low 45°.
Pressure30.30 inHg
Wind13 mph NE
Humidity55%
Visibility—
Dew point37°
Wed, 0463° / 44°0
63 °
Long Valley, Wednesday, 4 November
Clear. High 63°, low 44°.
Pressure30.09 inHg
Wind18.7 mph S
Humidity44%
Visibility—
Dew point35°
Thu, 0560° / 46°0
60 °
Long Valley, Thursday, 5 November
Clear. High 60°, low 46°.
Pressure30.03 inHg
Wind10.5 mph NW
Humidity42%
Visibility—
Dew point34°
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.