Monthly outlook for Summerville, SD: average high 55.3°, average low 39.4°. That is 3.9° above the climate normal for October. Precipitation is expected on 4 days (about 0.6 inches), against a normal of 2 days and 0.6 inches. The warmest day looks like 6 November (66.4°), the coolest 26 October (32.2°).
55.3°/39.4°
Average high / low
+3.9°
Above normal
4 / 2
Wet days / normal
0.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
25 October – 3 November
53.5°
50°
+2°
4 November – 13 November
58.3°
43.5°
+8.2°
14 November – 23 November
at normal
39.2°
—
October records over 66 years
90.1°2 October 1997All-time high
-6.3°30 October 1991All-time low
Climate normals and records are computed from the nearest reference point — Lemmon (11 mi).
Mon, 2641° / 32°0.18
41 °
Summerville, Monday, 26 October
Snow. High 41°, low 32°.
Pressure30.45 inHg
Wind11.8 mph E
Humidity69%
Visibility6.2 mi
Dew point30°
Tue, 2750° / 33°0
50 °
Summerville, Tuesday, 27 October
Overcast. High 50°, low 33°.
Pressure29.94 inHg
Wind13.7 mph SE
Humidity84%
Visibility6.2 mi
Dew point33°
Wed, 2860° / 36°0
60 °
Summerville, Wednesday, 28 October
Clear. High 60°, low 36°.
Pressure29.94 inHg
Wind10.3 mph W
Humidity37%
Visibility6.2 mi
Dew point30°
Thu, 2960° / 36°0
60 °
Summerville, Thursday, 29 October
Clear. High 60°, low 36°.
Pressure30.09 inHg
Wind9 mph NW
Humidity64%
Visibility—
Dew point38°
Fri, 3050° / 35°0.1
50 °
Summerville, Friday, 30 October
Light rain. High 50°, low 35°.
Pressure30.27 inHg
Wind12.7 mph E
Humidity60%
Visibility—
Dew point29°
Sat, 3154° / 46°0.15
54 °
Summerville, Saturday, 31 October
Light rain. High 54°, low 46°.
Pressure29.91 inHg
Wind8.7 mph E
Humidity96%
Visibility—
Dew point51°
Sun, 0162° / 47°0
62 °
Summerville, Sunday, 1 November
Overcast. High 62°, low 47°.
Pressure29.80 inHg
Wind13 mph S
Humidity63%
Visibility—
Dew point46°
Mon, 0254° / 38°0
54 °
Summerville, Monday, 2 November
Overcast. High 54°, low 38°.
Pressure29.85 inHg
Wind20.8 mph NW
Humidity36%
Visibility—
Dew point24°
Tue, 0354° / 36°0
54 °
Summerville, Tuesday, 3 November
Clear. High 54°, low 36°.
Pressure30.00 inHg
Wind10.6 mph NW
Humidity42%
Visibility—
Dew point25°
Wed, 0460° / 41°0
60 °
Summerville, Wednesday, 4 November
Mostly clear. High 60°, low 41°.
Pressure29.88 inHg
Wind6.7 mph W
Humidity34%
Visibility—
Dew point27°
Thu, 0563° / 42°0
63 °
Summerville, Thursday, 5 November
Partly cloudy. High 63°, low 42°.
Pressure29.91 inHg
Wind8 mph SW
Humidity33%
Visibility—
Dew point27°
Fri, 0666° / 48°0
66 °
Summerville, Friday, 6 November
Mostly clear. High 66°, low 48°.
Pressure29.68 inHg
Wind15.8 mph NW
Humidity29%
Visibility—
Dew point30°
Sat, 0753° / 42°0
53 °
Summerville, Saturday, 7 November
Overcast. High 53°, low 42°.
Pressure29.65 inHg
Wind20.2 mph SE
Humidity44%
Visibility—
Dew point29°
Sun, 0853° / 42°0.22
53 °
Summerville, Sunday, 8 November
Rain. High 53°, low 42°.
Pressure29.71 inHg
Wind10.8 mph NW
Humidity86%
Visibility—
Dew point43°
Mon, 0955° / 41°0
55 °
Summerville, Monday, 9 November
Overcast. High 55°, low 41°.
Pressure29.77 inHg
Wind22.9 mph NW
Humidity45%
Visibility—
Dew point31°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 1041° / 24°0.06
41 °
Summerville, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high41°
Average low24°
Average precipitation0.06 in
Chance of precipitation25%
Record high68° (2007)
Record low-8° (1986)
Wed, 1139° / 23°0.01
39 °
Summerville, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high39°
Average low23°
Average precipitation0.01 in
Chance of precipitation10%
Record high65° (2005)
Record low-8° (1986)
Thu, 1241° / 23°0.02
41 °
Summerville, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high41°
Average low23°
Average precipitation0.02 in
Chance of precipitation13%
Record high72° (1999)
Record low-10° (2022)
Fri, 1342° / 25°0.02
42 °
Summerville, Friday, 13 November
Climate normal for this date — 60-year average.
Average high42°
Average low25°
Average precipitation0.02 in
Chance of precipitation13%
Record high65° (1981)
Record low-20° (1986)
Sat, 1442° / 26°0.04
42 °
Summerville, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high42°
Average low26°
Average precipitation0.04 in
Chance of precipitation20%
Record high69° (2025)
Record low-14° (2014)
Sun, 1541° / 25°0.02
41 °
Summerville, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high41°
Average low25°
Average precipitation0.02 in
Chance of precipitation12%
Record high65° (1975)
Record low-7° (2014)
Mon, 1642° / 24°0.01
42 °
Summerville, Monday, 16 November
Climate normal for this date — 60-year average.
Average high42°
Average low24°
Average precipitation0.01 in
Chance of precipitation5%
Record high63° (1979)
Record low-9° (2022)
Tue, 1740° / 24°0.02
40 °
Summerville, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high40°
Average low24°
Average precipitation0.02 in
Chance of precipitation10%
Record high62° (2001)
Record low2° (1996)
Wed, 1840° / 23°0.03
40 °
Summerville, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high40°
Average low23°
Average precipitation0.03 in
Chance of precipitation20%
Record high62° (2007)
Record low-4° (1996)
Thu, 1938° / 24°0.03
38 °
Summerville, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high38°
Average low24°
Average precipitation0.03 in
Chance of precipitation18%
Record high63° (2003)
Record low4° (1985)
Fri, 2038° / 22°0.02
38 °
Summerville, Friday, 20 November
Climate normal for this date — 60-year average.
Average high38°
Average low22°
Average precipitation0.02 in
Chance of precipitation13%
Record high62° (1990)
Record low-13° (1985)
Sat, 2138° / 21°0.01
38 °
Summerville, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high38°
Average low21°
Average precipitation0.01 in
Chance of precipitation10%
Record high60° (2012)
Record low-14° (1985)
Sun, 2238° / 22°0.02
38 °
Summerville, Sunday, 22 November
Climate normal for this date — 60-year average.
Average high38°
Average low22°
Average precipitation0.02 in
Chance of precipitation13%
Record high60° (2017)
Record low-7° (1985)
Mon, 2336° / 21°0.02
36 °
Summerville, Monday, 23 November
Climate normal for this date — 60-year average.
Average high36°
Average low21°
Average precipitation0.02 in
Chance of precipitation17%
Record high62° (2017)
Record low-16° (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 Summerville, 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 Summerville, 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.