As of 22:43 MDT

Green Valley, SD weather in September

82°

Green Valley, Saturday, 8 August, 22:43

Clear. Feels like 80°. High 98°, low 64°.

Pressure29.85 inHg

Wind7 mph NW

Humidity26%

Visibility6.2 mi

Dew point44°

See detailed hourly forecast

In September, Green Valley, SD averages a high of 75° and a low of 52.6°. About 1.3 inches of precipitation fall over the month (5 wet days). The record high is 101.7° (2020) and the record low 25.7° (1985). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	81°	58.6°	17%	98.6° (2012)	44.4° (1965)
2	81.7°	59.4°	15%	99.3° (1960)	42.1° (1974)
3	81.7°	58.5°	13%	97.3° (2007)	40.3° (1974)
4	81.1°	58.1°	20%	100° (1960)	40.8° (1968)
5	81.3°	58.1°	13%	101.7° (2020)	39.4° (1968)
6	80.2°	56.8°	17%	99.3° (1978)	41.2° (2025)
7	79.2°	56.3°	15%	97.2° (2022)	41.5° (1986)
8	78.4°	55.6°	13%	93.4° (1979)	38.1° (2020)
9	77.7°	55°	15%	97.3° (1979)	29.5° (2020)
10	78.1°	54.9°	17%	96.8° (1998)	33.8° (1962)
11	76.1°	55°	22%	93.6° (2025)	31.5° (1989)
12	74.7°	54.3°	28%	95.5° (2004)	27.9° (2014)
13	72.9°	52.2°	20%	89.8° (2015)	34° (1970)
14	73°	51.6°	25%	90° (2006)	30.4° (1993)
15	74.3°	52.3°	28%	90.1° (2015)	36° (1970)
16	74.7°	51.8°	13%	92.7° (2007)	33.3° (1965)
17	74.5°	52.5°	23%	94.1° (2000)	27.3° (1965)
18	73.6°	51.4°	22%	93.2° (1998)	32.5° (1971)
19	72.9°	51.3°	23%	91.2° (2022)	34.9° (1991)
20	71.6°	49.6°	13%	90.7° (2010)	32° (1965)
21	68.9°	48.2°	22%	88.3° (2013)	27.5° (1995)
22	69.4°	47.8°	15%	92.7° (2007)	26.1° (1995)
23	70.2°	48°	25%	90.7° (1992)	29.5° (1965)
24	71.2°	48.4°	15%	90.9° (2020)	31.3° (1965)
25	72.5°	48.7°	18%	89.6° (2014)	28.4° (1984)
26	73.6°	49.3°	8%	94.3° (2024)	30.4° (1965)
27	70.3°	49.1°	12%	86.9° (2021)	33.1° (1964)
28	71.1°	48.4°	17%	89.2° (2024)	29.1° (1984)
29	70.7°	49.1°	13%	94.6° (2024)	26.1° (1984)
30	72.1°	48.9°	10%	89.8° (1989)	25.7° (1985)