Monthly outlook for Summerville, SD: average high 55.5°, average low 39.7°. That is 3.6° above the climate normal for October. Precipitation is expected on 2 days (about 0.5 inches), against a normal of 2 days and 0.5 inches. The warmest day looks like 7 November (66.6°), the coolest 26 October (31.8°).
55.5°/39.7°
Average high / low
+3.6°
Above normal
2 / 2
Wet days / normal
0.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
24 October – 2 November
51.8°
50.7°
+0.6°
3 November – 12 November
61.6°
43.9°
+9.8°
13 November – 22 November
at normal
39.9°
—
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).
Sun, 2551° / 34°0
51 °
Summerville, Sunday, 25 October
Overcast. High 51°, low 34°.
Pressure30.47 inHg
Wind9.1 mph E
Humidity50%
Visibility6.2 mi
Dew point23°
Mon, 2643° / 32°0.4
43 °
Summerville, Monday, 26 October
Snow. High 43°, low 32°.
Pressure30.45 inHg
Wind11.2 mph E
Humidity76%
Visibility6.2 mi
Dew point32°
Tue, 2740° / 32°0.01
40 °
Summerville, Tuesday, 27 October
Light rain. High 40°, low 32°.
Pressure29.94 inHg
Wind11.3 mph SE
Humidity88%
Visibility6.2 mi
Dew point33°
Wed, 2857° / 33°0
57 °
Summerville, Wednesday, 28 October
Partly cloudy. High 57°, low 33°.
Pressure30.00 inHg
Wind12.1 mph W
Humidity51%
Visibility6.2 mi
Dew point35°
Thu, 2955° / 33°0
55 °
Summerville, Thursday, 29 October
Mostly clear. High 55°, low 33°.
Pressure30.18 inHg
Wind16.6 mph SE
Humidity61%
Visibility—
Dew point35°
Fri, 3066° / 46°0
66 °
Summerville, Friday, 30 October
Overcast. High 66°, low 46°.
Pressure29.77 inHg
Wind13.2 mph SE
Humidity69%
Visibility—
Dew point48°
Sat, 3156° / 45°0
56 °
Summerville, Saturday, 31 October
Overcast. High 56°, low 45°.
Pressure29.68 inHg
Wind19 mph NW
Humidity65%
Visibility—
Dew point44°
Sun, 0148° / 38°0
48 °
Summerville, Sunday, 1 November
Overcast. High 48°, low 38°.
Pressure29.97 inHg
Wind20.6 mph NW
Humidity35%
Visibility—
Dew point20°
Mon, 0250° / 33°0
50 °
Summerville, Monday, 2 November
Clear. High 50°, low 33°.
Pressure30.33 inHg
Wind11.4 mph NW
Humidity32%
Visibility—
Dew point16°
Tue, 0358° / 38°0
58 °
Summerville, Tuesday, 3 November
Overcast. High 58°, low 38°.
Pressure30.00 inHg
Wind11 mph SE
Humidity41%
Visibility—
Dew point27°
Wed, 0450° / 44°0.13
50 °
Summerville, Wednesday, 4 November
Light rain. High 50°, low 44°.
Pressure29.71 inHg
Wind9.8 mph SE
Humidity63%
Visibility—
Dew point37°
Thu, 0562° / 42°0
62 °
Summerville, Thursday, 5 November
Clear. High 62°, low 42°.
Pressure29.97 inHg
Wind7.7 mph W
Humidity43%
Visibility—
Dew point34°
Fri, 0666° / 47°0
66 °
Summerville, Friday, 6 November
Overcast. High 66°, low 47°.
Pressure30.12 inHg
Wind8.8 mph NW
Humidity39%
Visibility—
Dew point34°
Sat, 0767° / 50°0
67 °
Summerville, Saturday, 7 November
Overcast. High 67°, low 50°.
Pressure30.06 inHg
Wind11.5 mph S
Humidity37%
Visibility—
Dew point35°
Sun, 0866° / 48°0
66 °
Summerville, Sunday, 8 November
Overcast. High 66°, low 48°.
Pressure29.71 inHg
Wind16.5 mph W
Humidity43%
Visibility—
Dew point38°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 0941° / 26°0.04
41 °
Summerville, Monday, 9 November
Climate normal for this date — 60-year average.
Average high41°
Average low26°
Average precipitation0.04 in
Chance of precipitation15%
Record high69° (2016)
Record low1° (2000)
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)
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.