As of 21:50 CDT

Weather in Erwin, SD

54°

Erwin, Wednesday, 7 October, 21:50

Overcast. Feels like 53°. High 72°, low 46°.

Pressure30.03 inHg

Wind5.1 mph N

Humidity69%

Visibility6.2 mi

Dew point45°

See detailed hourly forecast

Monthly outlook for Erwin, SD: average high 59.9°, average low 44.2°. That is 1.5° above the climate normal for October. Precipitation is expected on 5 days (about 1.5 inches), against a normal of 4 days and 1.1 inches. The warmest day looks like 10 October (80.3°), the coolest 18 October (32.8°).

59.9°/44.2°

Average high / low

+1.5°

Above normal

5 / 4

Wet days / normal

1.5 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
7 October – 16 October	63.6°	58.4°	+2.9°
17 October – 26 October	53.9°	54.4°	-0.3°
27 October – 5 November	at normal	48.8°	—

October records over 66 years

86.4°1 October 2023All-time high

7.9°26 October 2020All-time low

Thu, 0873° / 46°

73 °

Erwin, Thursday, 8 October

Overcast. High 73°, low 46°.

Pressure30.09 inHg

Wind7.4 mph SE

Humidity45%

Visibility6.2 mi

Dew point42°

Fri, 0976° / 49°

76 °

Erwin, Friday, 9 October

Clear. High 76°, low 49°.

Pressure29.85 inHg

Wind9.2 mph SE

Humidity76%

Visibility6.2 mi

Dew point60°

Sat, 1080° / 65°

80 °

Erwin, Saturday, 10 October

Clear. High 80°, low 65°.

Pressure29.62 inHg

Wind21.1 mph S

Humidity49%

Visibility6.2 mi

Dew point54°

Sun, 1173° / 53°

73 °

Erwin, Sunday, 11 October

Overcast. High 73°, low 53°.

Pressure29.68 inHg

Wind14.2 mph S

Humidity47%

Visibility6.2 mi

Dew point51°

Mon, 1251° / 43°

0.05

51 °

Erwin, Monday, 12 October

Light rain. High 51°, low 43°.

Pressure29.97 inHg

Wind13.2 mph NW

Humidity81%

Visibility—

Dew point42°

Tue, 1355° / 41°

55 °

Erwin, Tuesday, 13 October

Overcast. High 55°, low 41°.

Pressure30.24 inHg

Wind13.1 mph S

Humidity52%

Visibility—

Dew point31°

Wed, 1457° / 50°

0.59

57 °

Erwin, Wednesday, 14 October

Rain. High 57°, low 50°.

Pressure29.65 inHg

Wind19.7 mph S

Humidity85%

Visibility—

Dew point50°

Thu, 1556° / 45°

0.18

56 °

Erwin, Thursday, 15 October

Light rain. High 56°, low 45°.

Pressure29.68 inHg

Wind19.7 mph N

Humidity91%

Visibility—

Dew point53°

Fri, 1642° / 36°

0.64

42 °

Erwin, Friday, 16 October

Snow. High 42°, low 36°.

Pressure30.18 inHg

Wind18.7 mph N

Humidity98%

Visibility—

Dew point36°

Sat, 1741° / 36°

0.06

41 °

Erwin, Saturday, 17 October

Light rain. High 41°, low 36°.

Pressure30.24 inHg

Wind15.8 mph NW

Humidity77%

Visibility—

Dew point32°

Sun, 1853° / 33°

53 °

Erwin, Sunday, 18 October

Partly cloudy. High 53°, low 33°.

Pressure30.15 inHg

Wind13.2 mph S

Humidity52%

Visibility—

Dew point30°

Mon, 1963° / 42°

63 °

Erwin, Monday, 19 October

Clear. High 63°, low 42°.

Pressure30.06 inHg

Wind13.2 mph NW

Humidity38%

Visibility—

Dew point33°

Tue, 2051° / 39°

51 °

Erwin, Tuesday, 20 October

Overcast. High 51°, low 39°.

Pressure30.36 inHg

Wind9.4 mph NE

Humidity52%

Visibility—

Dew point30°

Wed, 2160° / 38°

60 °

Erwin, Wednesday, 21 October

Clear. High 60°, low 38°.

Pressure29.88 inHg

Wind24 mph S

Humidity50%

Visibility—

Dew point35°

Thu, 2257° / 47°

57 °

Erwin, Thursday, 22 October

Overcast. High 57°, low 47°.

Pressure29.47 inHg

Wind21.4 mph S

Humidity39%

Visibility—

Dew point31°

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

Fri, 2353° / 38°

0.07

53 °

Erwin, Friday, 23 October

Climate normal for this date — 60-year average.

Average high53°

Average low38°

Average precipitation0.07 in

Chance of precipitation20%

Record high77° (2022)

Record low20° (2020)

Sat, 2453° / 38°

0.03

53 °

Erwin, Saturday, 24 October

Climate normal for this date — 60-year average.

Average high53°

Average low38°

Average precipitation0.03 in

Chance of precipitation17%

Record high77° (1989)

Record low18° (2020)

Sun, 2553° / 38°

0.04

53 °

Erwin, Sunday, 25 October

Climate normal for this date — 60-year average.

Average high53°

Average low38°

Average precipitation0.04 in

Chance of precipitation15%

Record high77° (1989)

Record low18° (2020)

Mon, 2653° / 37°

0.02

53 °

Erwin, Monday, 26 October

Climate normal for this date — 60-year average.

Average high53°

Average low37°

Average precipitation0.02 in

Chance of precipitation15%

Record high76° (1989)

Record low8° (2020)

Tue, 2752° / 37°

0.09

52 °

Erwin, Tuesday, 27 October

Climate normal for this date — 60-year average.

Average high52°

Average low37°

Average precipitation0.09 in

Chance of precipitation30%

Record high69° (1999)

Record low11° (2020)

Wed, 2851° / 36°

0.03

51 °

Erwin, Wednesday, 28 October

Climate normal for this date — 60-year average.

Average high51°

Average low36°

Average precipitation0.03 in

Chance of precipitation15%

Record high71° (2024)

Record low20° (2023)

Thu, 2951° / 36°

0.06

51 °

Erwin, Thursday, 29 October

Climate normal for this date — 60-year average.

Average high51°

Average low36°

Average precipitation0.06 in

Chance of precipitation23%

Record high68° (2004)

Record low18° (1991)

Fri, 3049° / 36°

0.1

49 °

Erwin, Friday, 30 October

Climate normal for this date — 60-year average.

Average high49°

Average low36°

Average precipitation0.1 in

Chance of precipitation28%

Record high67° (1965)

Record low16° (1991)

Sat, 3149° / 34°

0.06

49 °

Erwin, Saturday, 31 October

Climate normal for this date — 60-year average.

Average high49°

Average low34°

Average precipitation0.06 in

Chance of precipitation17%

Record high70° (1990)

Record low17° (2019)

Sun, 0148° / 34°

0.06

48 °

Erwin, Sunday, 1 November

Climate normal for this date — 60-year average.

Average high48°

Average low34°

Average precipitation0.06 in

Chance of precipitation23%

Record high69° (1990)

Record low17° (2002)

Mon, 0247° / 33°

0.04

47 °

Erwin, Monday, 2 November

Climate normal for this date — 60-year average.

Average high47°

Average low33°

Average precipitation0.04 in

Chance of precipitation15%

Record high70° (1978)

Record low8° (1991)

Tue, 0347° / 34°

0.03

47 °

Erwin, Tuesday, 3 November

Climate normal for this date — 60-year average.

Average high47°

Average low34°

Average precipitation0.03 in

Chance of precipitation17%

Record high70° (1978)

Record low6° (1991)

Wed, 0447° / 32°

0.02

47 °

Erwin, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high47°

Average low32°

Average precipitation0.02 in

Chance of precipitation10%

Record high68° (2015)

Record low-4° (1991)

Thu, 0547° / 33°

0.04

47 °

Erwin, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high47°

Average low33°

Average precipitation0.04 in

Chance of precipitation22%

Record high70° (2001)

Record low11° (2003)

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 Erwin, 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 Erwin, 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.