As of 07:35 MDT

Weather in Summerville, SD

40°Current weather

Summerville, Wednesday, 21 October, 07:35

Clear. Feels like 36°. High 66°, low 40°.

Pressure30.24 inHg
Wind5.9 mph N
Humidity82%
Visibility6.2 mi
Dew point35°

Monthly outlook for Summerville, SD: average high 57°, average low 39.9°. That is 3.5° above the climate normal for October. Precipitation is expected on 2 days (about 0.3 inches), against a normal of 2 days and 0.6 inches. The warmest day looks like 23 October (76°), the coolest 5 November (33°).

57°/39.9°
Average high / low
+3.5°
Above normal
2 / 2
Wet days / normal
0.3 in
Precipitation this month

Ten-day blocks vs climate normal

PeriodForecast highNormalDifference
21 October – 30 October57.5°52.6°+2.7°
31 October – 9 November56.1°46.3°+5.4°
10 November – 19 Novemberat normal40.6°—

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).

Thu, 2273° / 47°0Overcast
73 °Overcast

Summerville, Thursday, 22 October

Overcast. High 73°, low 47°.

Pressure29.97 inHg
Wind7.6 mph SE
Humidity64%
Visibility6.2 mi
Dew point50°
Fri, 2376° / 55°0Overcast
76 °Overcast

Summerville, Friday, 23 October

Overcast. High 76°, low 55°.

Pressure29.71 inHg
Wind15.2 mph SE
Humidity67%
Visibility6.2 mi
Dew point58°
Sat, 2459° / 41°0Overcast
59 °Overcast

Summerville, Saturday, 24 October

Overcast. High 59°, low 41°.

Pressure30.33 inHg
Wind16.8 mph NW
Humidity56%
Visibility6.2 mi
Dew point33°
Sun, 2540° / 36°0.16Light rain
40 °Light rain

Summerville, Sunday, 25 October

Light rain. High 40°, low 36°.

Pressure30.45 inHg
Wind8.9 mph NE
Humidity74%
Visibility—
Dew point32°
Mon, 2641° / 36°0.03Light rain
41 °Light rain

Summerville, Monday, 26 October

Light rain. High 41°, low 36°.

Pressure30.53 inHg
Wind8.4 mph N
Humidity80%
Visibility—
Dew point32°
Tue, 2758° / 34°0Overcast
58 °Overcast

Summerville, Tuesday, 27 October

Overcast. High 58°, low 34°.

Pressure30.06 inHg
Wind12.8 mph S
Humidity57%
Visibility—
Dew point34°
Wed, 2850° / 40°0Overcast
50 °Overcast

Summerville, Wednesday, 28 October

Overcast. High 50°, low 40°.

Pressure30.21 inHg
Wind16.8 mph NW
Humidity30%
Visibility—
Dew point16°
Thu, 2958° / 36°0Clear
58 °Clear

Summerville, Thursday, 29 October

Clear. High 58°, low 36°.

Pressure30.18 inHg
Wind9.6 mph SE
Humidity29%
Visibility—
Dew point21°
Fri, 3055° / 42°0Overcast
55 °Overcast

Summerville, Friday, 30 October

Overcast. High 55°, low 42°.

Pressure29.77 inHg
Wind17.2 mph SE
Humidity47%
Visibility—
Dew point31°
Sat, 3163° / 49°0.06Light rain
63 °Light rain

Summerville, Saturday, 31 October

Light rain. High 63°, low 49°.

Pressure29.38 inHg
Wind15.3 mph NW
Humidity36%
Visibility—
Dew point32°
Sun, 0152° / 40°0.04Light rain
52 °Light rain

Summerville, Sunday, 1 November

Light rain. High 52°, low 40°.

Pressure30.09 inHg
Wind15 mph NW
Humidity35%
Visibility—
Dew point20°
Mon, 0257° / 37°0Partly cloudy
57 °Partly cloudy

Summerville, Monday, 2 November

Partly cloudy. High 57°, low 37°.

Pressure30.15 inHg
Wind11.2 mph S
Humidity36%
Visibility—
Dew point24°
Tue, 0356° / 38°0Clear
56 °Clear

Summerville, Tuesday, 3 November

Clear. High 56°, low 38°.

Pressure30.18 inHg
Wind6.4 mph SE
Humidity34%
Visibility—
Dew point24°
Wed, 0454° / 36°0Overcast
54 °Overcast

Summerville, Wednesday, 4 November

Overcast. High 54°, low 36°.

Pressure29.97 inHg
Wind7.4 mph SE
Humidity39%
Visibility—
Dew point24°
Thu, 0554° / 33°0Clear
54 °Clear

Summerville, Thursday, 5 November

Clear. High 54°, low 33°.

Pressure29.59 inHg
Wind5.8 mph SW
Humidity32%
Visibility—
Dew point19°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 0646° / 28°0.03Climate normal
46 °Climate normal

Summerville, Friday, 6 November

Climate normal for this date — 60-year average.

Average high46°
Average low28°
Average precipitation0.03 in
Chance of precipitation8%
Record high69° (2009)
Record low-5° (1991)
Sat, 0746° / 28°0.03Climate normal
46 °Climate normal

Summerville, Saturday, 7 November

Climate normal for this date — 60-year average.

Average high46°
Average low28°
Average precipitation0.03 in
Chance of precipitation12%
Record high73° (1999)
Record low-11° (1991)
Sun, 0844° / 28°0.03Climate normal
44 °Climate normal

Summerville, Sunday, 8 November

Climate normal for this date — 60-year average.

Average high44°
Average low28°
Average precipitation0.03 in
Chance of precipitation22%
Record high72° (1999)
Record low3° (2000)
Mon, 0941° / 26°0.04Climate normal
41 °Climate normal

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°0.06Climate normal
41 °Climate normal

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°0.01Climate normal
39 °Climate normal

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°0.02Climate normal
41 °Climate normal

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°0.02Climate normal
42 °Climate normal

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°0.04Climate normal
42 °Climate normal

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°0.02Climate normal
41 °Climate normal

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°0.01Climate normal
42 °Climate normal

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°0.02Climate normal
40 °Climate normal

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°0.03Climate normal
40 °Climate normal

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°0.03Climate normal
38 °Climate normal

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)

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.