As of 11:42 MDT

Weather in Isabel, SD

66°

Isabel, Thursday, 8 October, 11:42

Clear. Feels like 64°. High 69°, low 43°.

Pressure30.03 inHg

Wind9.5 mph SE

Humidity35%

Visibility6.2 mi

Dew point38°

See detailed hourly forecast

Monthly outlook for Isabel, SD: average high 59.8°, average low 43.7°. That is 1.3° above the climate normal for October. Precipitation is expected on 4 days (about 1.3 inches), against a normal of 3 days and 0.8 inches. The warmest day looks like 9 October (80.1°), the coolest 17 October (33.8°).

59.8°/43.7°

Average high / low

+1.3°

Above normal

4 / 3

Wet days / normal

1.3 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
8 October – 17 October	60.5°	58.2°	+1.3°
18 October – 27 October	58.5°	55.3°	+1.8°
28 October – 6 November	at normal	48.6°	—

October records over 66 years

89.4°4 October 1963All-time high

-5.6°30 October 1991All-time low

Climate normals and records are computed from the nearest reference point — Firesteel (7 mi).

Fri, 0980° / 45°

80 °

Isabel, Friday, 9 October

Overcast. High 80°, low 45°.

Pressure29.74 inHg

Wind15.8 mph S

Humidity51%

Visibility6.2 mi

Dew point52°

Sat, 1078° / 58°

78 °

Isabel, Saturday, 10 October

Clear. High 78°, low 58°.

Pressure29.47 inHg

Wind11.4 mph W

Humidity26%

Visibility6.2 mi

Dew point39°

Sun, 1157° / 45°

0.04

57 °

Isabel, Sunday, 11 October

Light rain. High 57°, low 45°.

Pressure29.85 inHg

Wind12.9 mph NE

Humidity92%

Visibility4.5 mi

Dew point49°

Mon, 1249° / 43°

0.04

49 °

Isabel, Monday, 12 October

Light rain. High 49°, low 43°.

Pressure29.97 inHg

Wind12.3 mph NE

Humidity79%

Visibility—

Dew point40°

Tue, 1351° / 38°

51 °

Isabel, Tuesday, 13 October

Overcast. High 51°, low 38°.

Pressure30.18 inHg

Wind7 mph N

Humidity66%

Visibility—

Dew point35°

Wed, 1467° / 46°

0.35

67 °

Isabel, Wednesday, 14 October

Rain. High 67°, low 46°.

Pressure29.53 inHg

Wind14.5 mph E

Humidity66%

Visibility—

Dew point53°

Thu, 1556° / 38°

0.8

56 °

Isabel, Thursday, 15 October

Rain. High 56°, low 38°.

Pressure29.68 inHg

Wind26.2 mph NW

Humidity78%

Visibility—

Dew point46°

Fri, 1644° / 37°

0.07

44 °

Isabel, Friday, 16 October

Snow. High 44°, low 37°.

Pressure30.65 inHg

Wind19.6 mph NW

Humidity60%

Visibility—

Dew point27°

Sat, 1754° / 34°

54 °

Isabel, Saturday, 17 October

Clear. High 54°, low 34°.

Pressure30.50 inHg

Wind20.1 mph S

Humidity51%

Visibility—

Dew point29°

Sun, 1855° / 45°

0.01

55 °

Isabel, Sunday, 18 October

Light rain. High 55°, low 45°.

Pressure30.00 inHg

Wind19.6 mph S

Humidity70%

Visibility—

Dew point41°

Mon, 1962° / 48°

62 °

Isabel, Monday, 19 October

Overcast. High 62°, low 48°.

Pressure29.97 inHg

Wind14.6 mph W

Humidity45%

Visibility—

Dew point35°

Tue, 2062° / 48°

62 °

Isabel, Tuesday, 20 October

Partly cloudy. High 62°, low 48°.

Pressure30.15 inHg

Wind17.1 mph W

Humidity34%

Visibility—

Dew point30°

Wed, 2166° / 48°

66 °

Isabel, Wednesday, 21 October

Overcast. High 66°, low 48°.

Pressure29.88 inHg

Wind27.8 mph NW

Humidity31%

Visibility—

Dew point32°

Thu, 2251° / 42°

51 °

Isabel, Thursday, 22 October

Overcast. High 51°, low 42°.

Pressure30.18 inHg

Wind30.7 mph NW

Humidity44%

Visibility—

Dew point28°

Fri, 2355° / 43°

55 °

Isabel, Friday, 23 October

Overcast. High 55°, low 43°.

Pressure29.56 inHg

Wind21.9 mph SE

Humidity34%

Visibility—

Dew point23°

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

Sat, 2454° / 36°

0.02

54 °

Isabel, Saturday, 24 October

Climate normal for this date — 60-year average.

Average high54°

Average low36°

Average precipitation0.02 in

Chance of precipitation12%

Record high77° (1989)

Record low9° (2020)

Sun, 2555° / 36°

0.01

55 °

Isabel, Sunday, 25 October

Climate normal for this date — 60-year average.

Average high55°

Average low36°

Average precipitation0.01 in

Chance of precipitation12%

Record high75° (1989)

Record low9° (2020)

Mon, 2655° / 36°

0.05

55 °

Isabel, Monday, 26 October

Climate normal for this date — 60-year average.

Average high55°

Average low36°

Average precipitation0.05 in

Chance of precipitation10%

Record high76° (1990)

Record low-3° (2020)

Tue, 2752° / 35°

0.03

52 °

Isabel, Tuesday, 27 October

Climate normal for this date — 60-year average.

Average high52°

Average low35°

Average precipitation0.03 in

Chance of precipitation13%

Record high74° (1983)

Record low7° (2020)

Wed, 2851° / 34°

0.06

51 °

Isabel, Wednesday, 28 October

Climate normal for this date — 60-year average.

Average high51°

Average low34°

Average precipitation0.06 in

Chance of precipitation17%

Record high73° (1985)

Record low15° (2023)

Thu, 2950° / 34°

0.1

50 °

Isabel, Thursday, 29 October

Climate normal for this date — 60-year average.

Average high50°

Average low34°

Average precipitation0.1 in

Chance of precipitation30%

Record high73° (1968)

Record low4° (1991)

Fri, 3049° / 32°

0.03

49 °

Isabel, Friday, 30 October

Climate normal for this date — 60-year average.

Average high49°

Average low32°

Average precipitation0.03 in

Chance of precipitation18%

Record high74° (1968)

Record low-6° (1991)

Sat, 3149° / 32°

0.03

49 °

Isabel, Saturday, 31 October

Climate normal for this date — 60-year average.

Average high49°

Average low32°

Average precipitation0.03 in

Chance of precipitation17%

Record high74° (1990)

Record low-6° (1991)

Sun, 0148° / 32°

0.04

48 °

Isabel, Sunday, 1 November

Climate normal for this date — 60-year average.

Average high48°

Average low32°

Average precipitation0.04 in

Chance of precipitation20%

Record high70° (1978)

Record low7° (1991)

Mon, 0249° / 31°

0.02

49 °

Isabel, Monday, 2 November

Climate normal for this date — 60-year average.

Average high49°

Average low31°

Average precipitation0.02 in

Chance of precipitation10%

Record high76° (2022)

Record low1° (1991)

Tue, 0347° / 32°

0.03

47 °

Isabel, Tuesday, 3 November

Climate normal for this date — 60-year average.

Average high47°

Average low32°

Average precipitation0.03 in

Chance of precipitation17%

Record high69° (2020)

Record low-9° (1991)

Wed, 0448° / 30°

0.01

48 °

Isabel, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high48°

Average low30°

Average precipitation0.01 in

Chance of precipitation10%

Record high74° (1978)

Record low-11° (1991)

Thu, 0547° / 30°

0.04

47 °

Isabel, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high47°

Average low30°

Average precipitation0.04 in

Chance of precipitation20%

Record high70° (2020)

Record low2° (2003)

Fri, 0647° / 29°

0.02

47 °

Isabel, Friday, 6 November

Climate normal for this date — 60-year average.

Average high47°

Average low29°

Average precipitation0.02 in

Chance of precipitation7%

Record high69° (2016)

Record low2° (1991)

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 Isabel, 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 Isabel, 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.