Monthly outlook for Rapid Valley, SD: average high 58.2°, average low 40.9°. That is 1.7° above the climate normal for October. Precipitation is expected on 2 days (about 0.4 inches), against a normal of 3 days and 0.6 inches. The warmest day looks like 23 October (83.3°), the coolest 27 October (34.4°).
58.2°/40.9°
Average high / low
+1.7°
Above normal
2 / 3
Wet days / normal
0.4 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
21 October – 30 October
60°
56.9°
+1.7°
31 October – 9 November
55.2°
51.4°
+2.1°
10 November – 19 November
at normal
47.3°
—
October records over 66 years
92.5°3 October 2025All-time high
-5.4°26 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Green Valley (2 mi).
Thu, 2279° / 52°0
79 °
Rapid Valley, Thursday, 22 October
Partly cloudy. High 79°, low 52°.
Pressure29.91 inHg
Wind11.3 mph S
Humidity36%
Visibility6.2 mi
Dew point46°
Fri, 2383° / 56°0
83 °
Rapid Valley, Friday, 23 October
Overcast. High 83°, low 56°.
Pressure29.65 inHg
Wind10.4 mph S
Humidity45%
Visibility6.2 mi
Dew point54°
Sat, 2460° / 42°0.15
60 °
Rapid Valley, Saturday, 24 October
Light rain. High 60°, low 42°.
Pressure30.33 inHg
Wind17.2 mph NW
Humidity57%
Visibility6.2 mi
Dew point33°
Sun, 2543° / 39°0.22
43 °
Rapid Valley, Sunday, 25 October
Light rain. High 43°, low 39°.
Pressure30.39 inHg
Wind7.1 mph NE
Humidity89%
Visibility—
Dew point37°
Mon, 2641° / 36°0
41 °
Rapid Valley, Monday, 26 October
Overcast. High 41°, low 36°.
Pressure30.50 inHg
Wind10.9 mph N
Humidity74%
Visibility—
Dew point31°
Tue, 2755° / 34°0
55 °
Rapid Valley, Tuesday, 27 October
Overcast. High 55°, low 34°.
Pressure30.03 inHg
Wind7.3 mph SE
Humidity66%
Visibility—
Dew point36°
Wed, 2850° / 40°0
50 °
Rapid Valley, Wednesday, 28 October
Partly cloudy. High 50°, low 40°.
Pressure30.21 inHg
Wind20.8 mph NW
Humidity44%
Visibility—
Dew point26°
Thu, 2954° / 38°0
54 °
Rapid Valley, Thursday, 29 October
Overcast. High 54°, low 38°.
Pressure30.12 inHg
Wind18.4 mph S
Humidity47%
Visibility—
Dew point31°
Fri, 3065° / 42°0
65 °
Rapid Valley, Friday, 30 October
Overcast. High 65°, low 42°.
Pressure29.65 inHg
Wind13.3 mph S
Humidity53%
Visibility—
Dew point37°
Sat, 3163° / 41°0.02
63 °
Rapid Valley, Saturday, 31 October
Light rain. High 63°, low 41°.
Pressure29.41 inHg
Wind21.5 mph NW
Humidity37%
Visibility—
Dew point34°
Sun, 0151° / 38°0
51 °
Rapid Valley, Sunday, 1 November
Clear. High 51°, low 38°.
Pressure30.09 inHg
Wind16.7 mph NW
Humidity40%
Visibility—
Dew point24°
Mon, 0257° / 36°0
57 °
Rapid Valley, Monday, 2 November
Partly cloudy. High 57°, low 36°.
Pressure30.12 inHg
Wind8 mph S
Humidity29%
Visibility—
Dew point19°
Tue, 0353° / 40°0
53 °
Rapid Valley, Tuesday, 3 November
Overcast. High 53°, low 40°.
Pressure30.18 inHg
Wind6.6 mph SE
Humidity31%
Visibility—
Dew point20°
Wed, 0452° / 37°0
52 °
Rapid Valley, Wednesday, 4 November
Overcast. High 52°, low 37°.
Pressure29.88 inHg
Wind11.1 mph SE
Humidity35%
Visibility—
Dew point22°
Thu, 0556° / 35°0
56 °
Rapid Valley, Thursday, 5 November
Mostly clear. High 56°, low 35°.
Pressure29.50 inHg
Wind21.4 mph NW
Humidity33%
Visibility—
Dew point21°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 0652° / 31°0.04
52 °
Rapid Valley, Friday, 6 November
Climate normal for this date — 60-year average.
Average high52°
Average low31°
Average precipitation0.04 in
Chance of precipitation12%
Record high78° (2020)
Record low-5° (2003)
Sat, 0752° / 31°0.03
52 °
Rapid Valley, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high52°
Average low31°
Average precipitation0.03 in
Chance of precipitation13%
Record high77° (1999)
Record low3° (2003)
Sun, 0850° / 31°0.06
50 °
Rapid Valley, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high50°
Average low31°
Average precipitation0.06 in
Chance of precipitation18%
Record high79° (1999)
Record low9° (2003)
Mon, 0947° / 29°0.06
47 °
Rapid Valley, Monday, 9 November
Climate normal for this date — 60-year average.
Average high47°
Average low29°
Average precipitation0.06 in
Chance of precipitation18%
Record high73° (2016)
Record low-4° (1966)
Tue, 1047° / 27°0.04
47 °
Rapid Valley, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high47°
Average low27°
Average precipitation0.04 in
Chance of precipitation17%
Record high70° (2005)
Record low-8° (1986)
Wed, 1145° / 27°0.02
45 °
Rapid Valley, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high45°
Average low27°
Average precipitation0.02 in
Chance of precipitation17%
Record high71° (2005)
Record low-13° (1986)
Thu, 1248° / 28°0.02
48 °
Rapid Valley, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high48°
Average low28°
Average precipitation0.02 in
Chance of precipitation15%
Record high73° (1999)
Record low-8° (1986)
Fri, 1349° / 29°0.04
49 °
Rapid Valley, Friday, 13 November
Climate normal for this date — 60-year average.
Average high49°
Average low29°
Average precipitation0.04 in
Chance of precipitation17%
Record high74° (1999)
Record low-17° (1986)
Sat, 1448° / 30°0.02
48 °
Rapid Valley, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high48°
Average low30°
Average precipitation0.02 in
Chance of precipitation17%
Record high75° (2025)
Record low2° (2014)
Sun, 1548° / 28°0.01
48 °
Rapid Valley, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high48°
Average low28°
Average precipitation0.01 in
Chance of precipitation10%
Record high71° (2021)
Record low4° (2014)
Mon, 1649° / 28°0.02
49 °
Rapid Valley, Monday, 16 November
Climate normal for this date — 60-year average.
Average high49°
Average low28°
Average precipitation0.02 in
Chance of precipitation5%
Record high71° (2001)
Record low-2° (2014)
Tue, 1747° / 28°0.02
47 °
Rapid Valley, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high47°
Average low28°
Average precipitation0.02 in
Chance of precipitation13%
Record high69° (2001)
Record low2° (2000)
Wed, 1847° / 28°0.03
47 °
Rapid Valley, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high47°
Average low28°
Average precipitation0.03 in
Chance of precipitation15%
Record high72° (2008)
Record low5° (1996)
Thu, 1945° / 28°0.03
45 °
Rapid Valley, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high45°
Average low28°
Average precipitation0.03 in
Chance of precipitation15%
Record high69° (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 Rapid 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 Rapid 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.