As of 01:01 CDT

Weather in Shelby, SD

72°

Shelby, Sunday, 9 August, 01:01

Clear. Feels like 73°. High 93°, low 65°.

Pressure29.74 inHg

Wind13 mph S

Humidity71%

Visibility6.2 mi

Dew point62°

See detailed hourly forecast

Monthly outlook for Shelby, SD: average high 88.6°, average low 63.8°. That is 2.2° above the climate normal for August. Precipitation is expected on 7 days (about 1.6 inches), against a normal of 4 days and 1.1 inches. The warmest day looks like 10 August (102°), the coolest 21 August (57.5°).

88.6°/63.8°

Average high / low

+2.2°

Above normal

7 / 4

Wet days / normal

1.6 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
9 August – 18 August	90.4°	84.7°	+3.2°
19 August – 28 August	85.7°	84.6°	+0.6°
29 August – 7 September	at normal	82.5°	—

August records over 66 years

107.6°13 August 1965All-time high

47.5°23 August 1966All-time low

Climate normals and records are computed from the nearest reference point — Fort Thompson (13 mi).

Mon, 10102° / 66°

0.33

102 °

Shelby, Monday, 10 August

Heavy rain. High 102°, low 66°.

Pressure29.80 inHg

Wind7.5 mph E

Humidity37%

Visibility6.2 mi

Dew point60°

Tue, 1193° / 66°

0.04

93 °

Shelby, Tuesday, 11 August

Light rain. High 93°, low 66°.

Pressure29.83 inHg

Wind12.1 mph NE

Humidity48%

Visibility6.2 mi

Dew point63°

Wed, 1293° / 66°

0.09

93 °

Shelby, Wednesday, 12 August

Light rain. High 93°, low 66°.

Pressure29.88 inHg

Wind7.4 mph E

Humidity41%

Visibility6.2 mi

Dew point59°

Thu, 1379° / 63°

0.63

79 °

Shelby, Thursday, 13 August

Rain. High 79°, low 63°.

Pressure30.00 inHg

Wind14 mph E

Humidity65%

Visibility—

Dew point60°

Fri, 1482° / 62°

82 °

Shelby, Friday, 14 August

Overcast. High 82°, low 62°.

Pressure30.09 inHg

Wind16.6 mph S

Humidity44%

Visibility—

Dew point53°

Sat, 1582° / 66°

82 °

Shelby, Saturday, 15 August

Overcast. High 82°, low 66°.

Pressure30.12 inHg

Wind9.2 mph S

Humidity72%

Visibility—

Dew point62°

Sun, 1688° / 65°

0.03

88 °

Shelby, Sunday, 16 August

Light rain. High 88°, low 65°.

Pressure30.03 inHg

Wind8.4 mph SE

Humidity53%

Visibility—

Dew point63°

Mon, 1795° / 67°

0.09

95 °

Shelby, Monday, 17 August

Light rain. High 95°, low 67°.

Pressure29.94 inHg

Wind12 mph SW

Humidity51%

Visibility—

Dew point64°

Tue, 1897° / 69°

0.01

97 °

Shelby, Tuesday, 18 August

Light rain. High 97°, low 69°.

Pressure29.91 inHg

Wind15.1 mph N

Humidity26%

Visibility—

Dew point49°

Wed, 1981° / 62°

0.03

81 °

Shelby, Wednesday, 19 August

Light rain. High 81°, low 62°.

Pressure30.12 inHg

Wind21 mph NE

Humidity36%

Visibility—

Dew point46°

Thu, 2071° / 58°

0.14

71 °

Shelby, Thursday, 20 August

Light rain. High 71°, low 58°.

Pressure30.09 inHg

Wind13.9 mph S

Humidity85%

Visibility—

Dew point59°

Fri, 2186° / 57°

0.19

86 °

Shelby, Friday, 21 August

Rain. High 86°, low 57°.

Pressure29.83 inHg

Wind21.7 mph S

Humidity39%

Visibility—

Dew point51°

Sat, 2288° / 64°

88 °

Shelby, Saturday, 22 August

Clear. High 88°, low 64°.

Pressure29.80 inHg

Wind16.8 mph NW

Humidity34%

Visibility—

Dew point52°

Sun, 2388° / 60°

88 °

Shelby, Sunday, 23 August

Mostly clear. High 88°, low 60°.

Pressure29.94 inHg

Wind8.9 mph E

Humidity24%

Visibility—

Dew point40°

Mon, 2499° / 65°

99 °

Shelby, Monday, 24 August

Clear. High 99°, low 65°.

Pressure29.68 inHg

Wind13 mph SE

Humidity24%

Visibility—

Dew point52°

From day 17 onward the outlook is built from 60-year climate statistics

Tue, 2585° / 65°

0.04

85 °

Shelby, Tuesday, 25 August

Climate normal for this date — 60-year average.

Average high85°

Average low65°

Average precipitation0.04 in

Chance of precipitation13%

Record high102° (1991)

Record low50° (1964)

Wed, 2685° / 65°

0.04

85 °

Shelby, Wednesday, 26 August

Climate normal for this date — 60-year average.

Average high85°

Average low65°

Average precipitation0.04 in

Chance of precipitation20%

Record high103° (1991)

Record low50° (1992)

Thu, 2784° / 65°

0.04

84 °

Shelby, Thursday, 27 August

Climate normal for this date — 60-year average.

Average high84°

Average low65°

Average precipitation0.04 in

Chance of precipitation22%

Record high101° (1962)

Record low48° (1992)

Fri, 2884° / 65°

0.07

84 °

Shelby, Friday, 28 August

Climate normal for this date — 60-year average.

Average high84°

Average low65°

Average precipitation0.07 in

Chance of precipitation18%

Record high99° (1991)

Record low49° (1986)

Sat, 2984° / 65°

0.03

84 °

Shelby, Saturday, 29 August

Climate normal for this date — 60-year average.

Average high84°

Average low65°

Average precipitation0.03 in

Chance of precipitation13%

Record high106° (2012)

Record low53° (1988)

Sun, 3084° / 64°

0.1

84 °

Shelby, Sunday, 30 August

Climate normal for this date — 60-year average.

Average high84°

Average low64°

Average precipitation0.1 in

Chance of precipitation20%

Record high98° (1961)

Record low52° (1992)

Mon, 3183° / 65°

0.03

83 °

Shelby, Monday, 31 August

Climate normal for this date — 60-year average.

Average high83°

Average low65°

Average precipitation0.03 in

Chance of precipitation17%

Record high96° (1979)

Record low51° (1993)

Tue, 0182° / 64°

0.07

82 °

Shelby, Tuesday, 1 September

Climate normal for this date — 60-year average.

Average high82°

Average low64°

Average precipitation0.07 in

Chance of precipitation22%

Record high100° (1983)

Record low47° (1965)

Wed, 0283° / 63°

0.11

83 °

Shelby, Wednesday, 2 September

Climate normal for this date — 60-year average.

Average high83°

Average low63°

Average precipitation0.11 in

Chance of precipitation18%

Record high102° (1983)

Record low48° (1974)

Thu, 0383° / 63°

0.05

83 °

Shelby, Thursday, 3 September

Climate normal for this date — 60-year average.

Average high83°

Average low63°

Average precipitation0.05 in

Chance of precipitation23%

Record high98° (2023)

Record low43° (1974)

Fri, 0482° / 63°

0.07

82 °

Shelby, Friday, 4 September

Climate normal for this date — 60-year average.

Average high82°

Average low63°

Average precipitation0.07 in

Chance of precipitation17%

Record high99° (2023)

Record low46° (1962)

Sat, 0582° / 63°

0.06

82 °

Shelby, Saturday, 5 September

Climate normal for this date — 60-year average.

Average high82°

Average low63°

Average precipitation0.06 in

Chance of precipitation18%

Record high100° (1978)

Record low45° (1965)

Sun, 0682° / 62°

0.04

82 °

Shelby, Sunday, 6 September

Climate normal for this date — 60-year average.

Average high82°

Average low62°

Average precipitation0.04 in

Chance of precipitation17%

Record high103° (1976)

Record low47° (2025)

Mon, 0780° / 60°

0.08

80 °

Shelby, Monday, 7 September

Climate normal for this date — 60-year average.

Average high80°

Average low60°

Average precipitation0.08 in

Chance of precipitation28%

Record high97° (1980)

Record low43° (1986)

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 Shelby, 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 Shelby, 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.