As of 07:30 CDT

Erwin, SD weather in September

46°

Erwin, Wednesday, 7 October, 07:30

Mostly clear. Feels like 44°. High 73°, low 46°.

Pressure30.00 inHg

Wind5.1 mph NW

Humidity84%

Visibility6.2 mi

Dew point42°

See detailed hourly forecast

In September, Erwin, SD averages a high of 70.8° and a low of 54.3°. About 2.5 inches of precipitation fall over the month (7 wet days). The record high is 96.8° (1970) and the record low 27° (1965). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	76.5°	60.6°	20%	92.3° (1970)	44.1° (1965)
2	77.2°	60.3°	25%	94.6° (1983)	46.4° (1974)
3	76.6°	60.1°	20%	93° (2023)	41.4° (1974)
4	76.8°	59.5°	22%	95.2° (2023)	44.2° (1962)
5	75.6°	59.7°	18%	91° (1978)	40.5° (1965)
6	76.3°	58.5°	20%	96.8° (1970)	43° (2025)
7	74.3°	57.2°	23%	91° (1978)	41.7° (1986)
8	73.2°	56.7°	25%	90.1° (1980)	40.6° (2020)
9	72.9°	57.2°	27%	93.2° (1979)	38.7° (2020)
10	74.1°	56.7°	22%	87.8° (1998)	37° (2020)
11	73°	56.8°	33%	91.6° (2012)	40.5° (1964)
12	72.1°	56.1°	27%	89.6° (1990)	40.8° (1989)
13	70.5°	54.9°	23%	91° (1990)	40.6° (1974)
14	69.4°	53.6°	32%	90.1° (1969)	40.6° (1993)
15	70°	54.1°	32%	88.9° (2018)	39.4° (1993)
16	70.7°	54.3°	23%	88.3° (2021)	39.9° (1970)
17	70.2°	54.5°	28%	83.7° (2019)	37.9° (1965)
18	70.5°	54.1°	38%	86.5° (2000)	37° (1991)
19	69.8°	54.1°	27%	88.3° (1972)	32.4° (1991)
20	68.2°	52.3°	33%	85.6° (1970)	36.5° (2006)
21	66.2°	50.9°	27%	83.7° (2005)	34.9° (1983)
22	65.3°	49.5°	27%	86.4° (2017)	31.1° (1995)
23	65.8°	49.3°	25%	84.2° (2007)	34.7° (1965)
24	66.2°	50.4°	30%	78.4° (1990)	33.1° (1965)
25	66.7°	49.6°	23%	81.3° (1990)	33.6° (1984)
26	68.5°	50°	13%	85.6° (1974)	27° (1965)
27	66.4°	49.3°	17%	82.8° (2021)	35.2° (1965)
28	65.5°	48.4°	22%	86.9° (2021)	30.9° (1984)
29	66.7°	49.5°	27%	83.3° (2024)	31.3° (1984)
30	67.8°	50°	20%	83.1° (2000)	32.9° (1974)