Monthly outlook for Rapid City, SD: average high 58.2°, average low 40.4°. That is 2° 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 (82.6°), the coolest 28 October (25.3°).
58.2°/40.4°
Average high / low
+2°
Above normal
2 / 3
Wet days / normal
0.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
22 October – 31 October
58°
56°
+1.1°
1 November – 10 November
58.6°
50.9°
+4.3°
11 November – 20 November
at normal
47°
—
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 (6 mi).
Fri, 2383° / 54°0
83 °
Rapid City, Friday, 23 October
Partly cloudy. High 83°, low 54°.
Pressure29.59 inHg
Wind6.9 mph S
Humidity40%
Visibility6.2 mi
Dew point53°
Sat, 2458° / 41°0
58 °
Rapid City, Saturday, 24 October
Clear. High 58°, low 41°.
Pressure30.39 inHg
Wind11.7 mph N
Humidity45%
Visibility6.2 mi
Dew point21°
Sun, 2542° / 37°0.16
42 °
Rapid City, Sunday, 25 October
Light rain. High 42°, low 37°.
Pressure30.45 inHg
Wind6.8 mph SE
Humidity87%
Visibility6.2 mi
Dew point36°
Mon, 2643° / 35°0
43 °
Rapid City, Monday, 26 October
Overcast. High 43°, low 35°.
Pressure30.53 inHg
Wind4.6 mph NE
Humidity73%
Visibility—
Dew point32°
Tue, 2743° / 31°0.07
43 °
Rapid City, Tuesday, 27 October
Light snow. High 43°, low 31°.
Pressure30.39 inHg
Wind13.3 mph N
Humidity73%
Visibility—
Dew point33°
Wed, 2847° / 25°0
47 °
Rapid City, Wednesday, 28 October
Mostly clear. High 47°, low 25°.
Pressure30.50 inHg
Wind11.7 mph SE
Humidity64%
Visibility—
Dew point28°
Thu, 2963° / 35°0
63 °
Rapid City, Thursday, 29 October
Overcast. High 63°, low 35°.
Pressure29.80 inHg
Wind8.8 mph SW
Humidity32%
Visibility—
Dew point28°
Fri, 3067° / 48°0
67 °
Rapid City, Friday, 30 October
Overcast. High 67°, low 48°.
Pressure29.56 inHg
Wind8.4 mph W
Humidity20%
Visibility—
Dew point23°
Sat, 3156° / 44°0
56 °
Rapid City, Saturday, 31 October
Overcast. High 56°, low 44°.
Pressure29.56 inHg
Wind24.7 mph N
Humidity39%
Visibility—
Dew point31°
Sun, 0151° / 35°0
51 °
Rapid City, Sunday, 1 November
Mostly clear. High 51°, low 35°.
Pressure30.06 inHg
Wind21.2 mph NW
Humidity33%
Visibility—
Dew point20°
Mon, 0251° / 32°0
51 °
Rapid City, Monday, 2 November
Overcast. High 51°, low 32°.
Pressure30.30 inHg
Wind6.8 mph SE
Humidity38%
Visibility—
Dew point21°
Tue, 0359° / 38°0
59 °
Rapid City, Tuesday, 3 November
Partly cloudy. High 59°, low 38°.
Pressure30.03 inHg
Wind9.8 mph W
Humidity31%
Visibility—
Dew point23°
Wed, 0462° / 47°0
62 °
Rapid City, Wednesday, 4 November
Overcast. High 62°, low 47°.
Pressure29.50 inHg
Wind30.9 mph NW
Humidity36%
Visibility—
Dew point34°
Thu, 0559° / 38°0
59 °
Rapid City, Thursday, 5 November
Overcast. High 59°, low 38°.
Pressure29.88 inHg
Wind18.1 mph NW
Humidity46%
Visibility—
Dew point27°
Fri, 0669° / 51°0
69 °
Rapid City, Friday, 6 November
Clear. High 69°, low 51°.
Pressure29.88 inHg
Wind11.6 mph N
Humidity36%
Visibility—
Dew point38°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 0752° / 31°0.03
52 °
Rapid City, 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 City, 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 City, 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 City, 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 City, 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 City, 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 City, 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 City, 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 City, 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 City, 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 City, 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 City, 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 City, 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)
Fri, 2045° / 26°0.02
45 °
Rapid City, Friday, 20 November
Climate normal for this date — 60-year average.
Average high45°
Average low26°
Average precipitation0.02 in
Chance of precipitation8%
Record high65° (1990)
Record low-9° (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 City, 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 City, 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.