As of 13:36 CDT

Weather in Erwin, SD

67°

Erwin, Thursday, 8 October, 13:36

Partly cloudy. Feels like 65°. High 68°, low 44°.

Pressure30.06 inHg

Wind4.3 mph S

Humidity39%

Visibility6.2 mi

Dew point41°

See detailed hourly forecast

Monthly outlook for Erwin, SD: average high 60.9°, average low 46.3°. That is 2.3° above the climate normal for October. Precipitation is expected on 3 days (about 0.4 inches), against a normal of 3 days and 1.1 inches. The warmest day looks like 10 October (80°), the coolest 17 October (33.1°).

60.9°/46.3°

Average high / low

+2.3°

Above normal

3 / 3

Wet days / normal

0.4 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
8 October – 17 October	63.2°	57.9°	+3°
18 October – 27 October	56.9°	53.9°	+1.7°
28 October – 6 November	at normal	48.2°	—

October records over 66 years

86.4°1 October 2023All-time high

7.9°26 October 2020All-time low

Fri, 0976° / 49°

76 °

Erwin, Friday, 9 October

Mostly clear. High 76°, low 49°.

Pressure29.91 inHg

Wind10.2 mph SE

Humidity68%

Visibility6.2 mi

Dew point55°

Sat, 1080° / 64°

80 °

Erwin, Saturday, 10 October

Clear. High 80°, low 64°.

Pressure29.62 inHg

Wind20.2 mph S

Humidity44%

Visibility6.2 mi

Dew point52°

Sun, 1177° / 56°

77 °

Erwin, Sunday, 11 October

Overcast. High 77°, low 56°.

Pressure29.71 inHg

Wind12.3 mph S

Humidity49%

Visibility6.2 mi

Dew point54°

Mon, 1257° / 49°

0.03

57 °

Erwin, Monday, 12 October

Light rain. High 57°, low 49°.

Pressure29.91 inHg

Wind7.2 mph NE

Humidity81%

Visibility6.2 mi

Dew point47°

Tue, 1354° / 45°

54 °

Erwin, Tuesday, 13 October

Overcast. High 54°, low 45°.

Pressure30.12 inHg

Wind8.7 mph N

Humidity67%

Visibility—

Dew point41°

Wed, 1457° / 48°

0.21

57 °

Erwin, Wednesday, 14 October

Rain. High 57°, low 48°.

Pressure29.68 inHg

Wind14.8 mph E

Humidity92%

Visibility—

Dew point54°

Thu, 1568° / 47°

0.03

68 °

Erwin, Thursday, 15 October

Light rain. High 68°, low 47°.

Pressure29.56 inHg

Wind24.7 mph W

Humidity61%

Visibility—

Dew point49°

Fri, 1644° / 40°

44 °

Erwin, Friday, 16 October

Overcast. High 44°, low 40°.

Pressure30.56 inHg

Wind19.8 mph NW

Humidity60%

Visibility—

Dew point30°

Sat, 1752° / 33°

52 °

Erwin, Saturday, 17 October

Clear. High 52°, low 33°.

Pressure30.65 inHg

Wind10.2 mph S

Humidity47%

Visibility—

Dew point27°

Sun, 1848° / 44°

0.08

48 °

Erwin, Sunday, 18 October

Light rain. High 48°, low 44°.

Pressure30.27 inHg

Wind16.5 mph S

Humidity86%

Visibility—

Dew point41°

Mon, 1960° / 49°

0.01

60 °

Erwin, Monday, 19 October

Light rain. High 60°, low 49°.

Pressure29.97 inHg

Wind15.4 mph S

Humidity58%

Visibility—

Dew point40°

Tue, 2063° / 45°

63 °

Erwin, Tuesday, 20 October

Clear. High 63°, low 45°.

Pressure30.09 inHg

Wind16.2 mph NW

Humidity33%

Visibility—

Dew point30°

Wed, 2167° / 45°

67 °

Erwin, Wednesday, 21 October

Overcast. High 67°, low 45°.

Pressure29.97 inHg

Wind23.4 mph NW

Humidity36%

Visibility—

Dew point33°

Thu, 2249° / 42°

0.04

49 °

Erwin, Thursday, 22 October

Light rain. High 49°, low 42°.

Pressure30.03 inHg

Wind27.4 mph W

Humidity76%

Visibility—

Dew point38°

Fri, 2355° / 39°

55 °

Erwin, Friday, 23 October

Overcast. High 55°, low 39°.

Pressure29.74 inHg

Wind24.7 mph SE

Humidity46%

Visibility—

Dew point30°

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

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)

Fri, 0646° / 32°

0.03

46 °

Erwin, Friday, 6 November

Climate normal for this date — 60-year average.

Average high46°

Average low32°

Average precipitation0.03 in

Chance of precipitation15%

Record high72° (2020)

Record low8° (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.