Monthly outlook for Rapid Valley, SD: average high 67.2°, average low 45.7°. That is 5.8° above the climate normal for October. Precipitation is expected on 2 days (about 0.2 inches), against a normal of 3 days and 0.6 inches. The warmest day looks like 23 October (75.8°), the coolest 25 October (37.4°).
67.2°/45.7°
Average high / low
+5.8°
Above normal
2 / 3
Wet days / normal
0.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
18 October – 27 October
67°
58.9°
+4.5°
28 October – 6 November
67.6°
52.8°
+8.2°
7 November – 16 November
at normal
48.3°
—
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).
Mon, 1965° / 40°0
65 °
Rapid Valley, Monday, 19 October
Clear. High 65°, low 40°.
Pressure30.18 inHg
Wind9.8 mph S
Humidity44%
Visibility6.2 mi
Dew point36°
Tue, 2075° / 44°0
75 °
Rapid Valley, Tuesday, 20 October
Clear. High 75°, low 44°.
Pressure29.94 inHg
Wind11 mph S
Humidity38%
Visibility6.2 mi
Dew point42°
Wed, 2167° / 51°0
67 °
Rapid Valley, Wednesday, 21 October
Clear. High 67°, low 51°.
Pressure30.18 inHg
Wind4.6 mph NE
Humidity52%
Visibility6.2 mi
Dew point46°
Thu, 2274° / 50°0
74 °
Rapid Valley, Thursday, 22 October
Mostly clear. High 74°, low 50°.
Pressure29.97 inHg
Wind16.4 mph SE
Humidity52%
Visibility—
Dew point48°
Fri, 2376° / 54°0.09
76 °
Rapid Valley, Friday, 23 October
Light rain. High 76°, low 54°.
Pressure29.59 inHg
Wind13.9 mph W
Humidity54%
Visibility—
Dew point52°
Sat, 2449° / 41°0.07
49 °
Rapid Valley, Saturday, 24 October
Light rain. High 49°, low 41°.
Pressure30.39 inHg
Wind28.6 mph NW
Humidity45%
Visibility—
Dew point27°
Sun, 2562° / 37°0
62 °
Rapid Valley, Sunday, 25 October
Partly cloudy. High 62°, low 37°.
Pressure30.27 inHg
Wind18.3 mph S
Humidity38%
Visibility—
Dew point27°
Mon, 2663° / 46°0
63 °
Rapid Valley, Monday, 26 October
Clear. High 63°, low 46°.
Pressure30.00 inHg
Wind11.5 mph N
Humidity27%
Visibility—
Dew point25°
Tue, 2771° / 41°0
71 °
Rapid Valley, Tuesday, 27 October
Clear. High 71°, low 41°.
Pressure29.83 inHg
Wind20.9 mph S
Humidity41%
Visibility—
Dew point33°
Wed, 2863° / 43°0
63 °
Rapid Valley, Wednesday, 28 October
Clear. High 63°, low 43°.
Pressure29.80 inHg
Wind7.8 mph NE
Humidity24%
Visibility—
Dew point22°
Thu, 2967° / 45°0
67 °
Rapid Valley, Thursday, 29 October
Overcast. High 67°, low 45°.
Pressure29.74 inHg
Wind11.1 mph E
Humidity28%
Visibility—
Dew point26°
Fri, 3067° / 50°0
67 °
Rapid Valley, Friday, 30 October
Overcast. High 67°, low 50°.
Pressure29.65 inHg
Wind11.3 mph NW
Humidity23%
Visibility—
Dew point22°
Sat, 3173° / 50°0
73 °
Rapid Valley, Saturday, 31 October
Overcast. High 73°, low 50°.
Pressure29.56 inHg
Wind7.9 mph W
Humidity18%
Visibility—
Dew point23°
Sun, 0167° / 47°0
67 °
Rapid Valley, Sunday, 1 November
Clear. High 67°, low 47°.
Pressure29.91 inHg
Wind11.3 mph SE
Humidity22%
Visibility—
Dew point23°
Mon, 0269° / 46°0
69 °
Rapid Valley, Monday, 2 November
Mostly clear. High 69°, low 46°.
Pressure30.00 inHg
Wind8.8 mph SE
Humidity21%
Visibility—
Dew point21°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 0351° / 33°0.04
51 °
Rapid Valley, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high51°
Average low33°
Average precipitation0.04 in
Chance of precipitation20%
Record high73° (2020)
Record low2° (1991)
Wed, 0454° / 32°0.01
54 °
Rapid Valley, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high54°
Average low32°
Average precipitation0.01 in
Chance of precipitation8%
Record high78° (1978)
Record low8° (1995)
Thu, 0552° / 33°0.03
52 °
Rapid Valley, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high52°
Average low33°
Average precipitation0.03 in
Chance of precipitation13%
Record high78° (2020)
Record low3° (1973)
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)
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.