As of 12:23 MDT

Green Grass, SD weather in September

73°

Green Grass, Wednesday, 7 October, 12:23

Overcast. Feels like 71°. High 73°, low 44°.

Pressure30.03 inHg

Wind4.1 mph NW

Humidity36%

Visibility6.2 mi

Dew point44°

See detailed hourly forecast

In September, Green Grass, SD averages a high of 74.7° and a low of 54.2°. About 1.6 inches of precipitation fall over the month (6 wet days). The record high is 102.4° (1976) and the record low 26.4° (1965). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	81.5°	60.6°	17%	101.5° (2012)	42.3° (1965)
2	81.5°	61°	23%	100.2° (1960)	44.2° (1974)
3	81.5°	60.3°	13%	100.8° (2007)	45° (1974)
4	81.5°	60.3°	25%	100.9° (1960)	42.1° (1962)
5	80.8°	59.9°	17%	100.9° (1978)	38.8° (1965)
6	80.6°	58.5°	17%	102.4° (1976)	39.9° (2025)
7	78.8°	57.7°	20%	98.2° (2002)	39.2° (1986)
8	77.5°	57.2°	8%	95.5° (1990)	40.5° (2020)
9	77.4°	56.7°	15%	97° (1994)	33.1° (2020)
10	78.4°	56.7°	17%	97.7° (1982)	39.2° (2020)
11	76.3°	56.7°	20%	95.4° (1990)	37.2° (1989)
12	75.6°	56.1°	20%	94.8° (1990)	33.8° (2014)
13	73.2°	54.3°	27%	90.9° (2015)	38.3° (1970)
14	72.5°	53.2°	25%	91.6° (2006)	37.8° (1961)
15	73.9°	54.1°	27%	91.6° (2012)	39.7° (1982)
16	73.9°	54.1°	17%	92.3° (1979)	35.8° (1965)
17	73.9°	53.6°	23%	97.2° (2000)	34° (1965)
18	73°	53.2°	27%	94.5° (2000)	36.9° (1965)
19	72.3°	53.2°	30%	95.9° (1972)	33.6° (1991)
20	70.9°	51.3°	15%	91.6° (1960)	35.6° (1983)
21	68.5°	50.4°	15%	90.1° (1984)	31.8° (1995)
22	68.7°	48.9°	17%	92.3° (2007)	30.4° (1995)
23	69.6°	48.7°	23%	93° (2007)	30.9° (1965)
24	71.2°	48.9°	22%	95° (1992)	32.7° (1985)
25	71.6°	50.2°	20%	89.4° (1974)	29.3° (1984)
26	72.5°	50.5°	12%	92.8° (1974)	26.4° (1965)
27	70°	49.8°	18%	89.8° (1983)	32.4° (1967)
28	70.3°	49.1°	18%	91.4° (2021)	28.2° (1984)
29	70.3°	50°	8%	95.5° (2024)	28.6° (1984)
30	71.8°	50°	12%	93.7° (1989)	29.7° (1985)