As of 10:40 MDT

Green Valley, SD weather in October

80°

Green Valley, Sunday, 9 August, 10:40

Overcast. Feels like 81°. High 93°, low 65°.

Pressure29.88 inHg

Wind2 mph SW

Humidity49%

Visibility6.2 mi

Dew point59°

See detailed hourly forecast

In October, Green Valley, SD averages a high of 60.6° and a low of 40.1°. About 1.6 inches of precipitation fall over the month (6 wet days). The record high is 92.5° (2025) and the record low -5.4° (2020). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	69.1°	47.8°	20%	89.1° (2005)	23.5° (1985)
2	68.2°	47.5°	23%	90.7° (2011)	30.7° (1999)
3	65.5°	45.9°	23%	92.5° (2025)	25.3° (1999)
4	64.9°	44.1°	23%	91.6° (1963)	32.5° (2013)
5	63.7°	45°	27%	91.4° (1963)	30.7° (1991)
6	64°	41.9°	17%	88.7° (1975)	25.5° (2000)
7	65.7°	42.6°	20%	89.1° (1975)	24.6° (2000)
8	63.9°	43.7°	25%	89.4° (2020)	16° (1970)
9	62.1°	41.9°	22%	85.3° (2003)	15.1° (1970)
10	64.2°	41.5°	20%	85.1° (2015)	17.2° (2009)
11	62.8°	42.4°	25%	86° (2015)	18.9° (1987)
12	61.5°	41.2°	18%	83.7° (1991)	21.2° (2009)
13	60.1°	40.1°	18%	81.5° (1962)	16.5° (1969)
14	59.2°	40.6°	23%	84.2° (2016)	17.1° (1969)
15	58.8°	39°	15%	81.5° (1964)	14.7° (1966)
16	60.4°	39.6°	22%	84.9° (2024)	18.3° (1966)
17	60.8°	39.2°	20%	81.5° (2003)	23° (1966)
18	59.4°	39°	17%	81.7° (2015)	23.7° (1972)
19	62.1°	39.6°	13%	84.7° (2003)	23.9° (1976)
20	61.9°	40.3°	13%	81° (2017)	24.3° (1987)
21	60.8°	40.1°	22%	83.8° (1992)	23.5° (1984)
22	58.3°	39.7°	18%	80.2° (2003)	18° (1981)
23	57°	37.2°	22%	81.7° (1973)	15.6° (1981)
24	57.7°	36.7°	13%	79.3° (1978)	10.4° (2002)
25	58.3°	37°	5%	76.3° (1989)	7.3° (2020)
26	57.9°	36.7°	13%	77° (1990)	-5.4° (2020)
27	55.8°	35.2°	22%	80.4° (2016)	6.6° (2020)
28	55.8°	35.6°	17%	78.1° (2016)	12.7° (1991)
29	54.3°	35.1°	35%	77.2° (1968)	9.9° (1991)
30	52.7°	34°	22%	78.1° (1968)	3° (1991)
31	52.7°	33.8°	13%	75.6° (1990)	2.5° (1991)