As of 12:31 CDT

Groton, SD weather in September

76°

Groton, Sunday, 9 August, 12:31

Mostly clear. Feels like 76°. High 82°, low 62°.

Pressure29.85 inHg

Wind13.2 mph NE

Humidity46%

Visibility6.2 mi

Dew point54°

See detailed hourly forecast

In September, Groton, SD averages a high of 72.3° and a low of 54°. About 2.3 inches of precipitation fall over the month (7 wet days). The record high is 101.1° (1983) and the record low 24.4° (1965). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	78.4°	60.6°	27%	95.5° (1983)	43.5° (1965)
2	78.3°	60.4°	28%	101.1° (1983)	45° (1974)
3	78.8°	59.7°	20%	93.4° (1960)	40.5° (1974)
4	78.6°	60.1°	20%	97.5° (1979)	42.4° (2025)
5	77.5°	59.7°	23%	99° (1978)	38.8° (1965)
6	77.4°	57.6°	23%	98.2° (1976)	43.5° (2025)
7	76.1°	57°	25%	97.2° (1978)	39.9° (2025)
8	75.2°	56.5°	22%	94.8° (1983)	40.6° (1992)
9	74.7°	56.7°	25%	94.6° (1979)	37° (2020)
10	75.4°	56.3°	15%	93.6° (1998)	39.2° (2020)
11	74.3°	56.7°	30%	92.5° (1990)	37.9° (1964)
12	73.6°	55.8°	20%	91.2° (1976)	40.5° (2014)
13	71.8°	54.5°	25%	92.5° (1990)	38.8° (1970)
14	70.9°	53.4°	30%	88.7° (2015)	40.6° (1964)
15	71.6°	54.1°	23%	91.8° (2018)	39.7° (2011)
16	72.5°	54.5°	23%	93.6° (2018)	40.1° (1971)
17	71.6°	54.1°	22%	91° (1989)	37.9° (1965)
18	72.1°	53.8°	30%	91.6° (1998)	36.9° (1971)
19	71.1°	54°	27%	93.2° (1984)	33.6° (1991)
20	69.6°	52.3°	32%	85.5° (1960)	35.2° (2006)
21	67.1°	50.5°	27%	86.7° (2015)	33.6° (1995)
22	66.7°	49.5°	22%	86.7° (2017)	30.6° (1995)
23	66.9°	48.7°	28%	87.6° (2007)	32.5° (1989)
24	68.4°	49.5°	28%	82.2° (1990)	30.9° (2000)
25	68.2°	49.6°	20%	85.5° (1990)	33.6° (1984)
26	69.8°	49.8°	18%	90.7° (1974)	24.4° (1965)
27	67.5°	48.6°	13%	86.2° (1983)	33.6° (1967)
28	67.3°	48°	25%	89.8° (2021)	31.6° (1984)
29	67.5°	49.3°	13%	88° (2024)	30.9° (1984)
30	69.1°	49.3°	18%	87.1° (1976)	32.2° (1974)