As of 15:54 MDT

Blackhawk, SD weather in September

89°

Blackhawk, Sunday, 9 August, 15:54

Mostly clear. Feels like 86°. High 89°, low 60°.

Pressure29.71 inHg

Wind1 mph NE

Humidity27%

Visibility6.2 mi

Dew point51°

See detailed hourly forecast

In September, Blackhawk, SD averages a high of 71.8° and a low of 50.8°. About 1.5 inches of precipitation fall over the month (7 wet days). The record high is 99° (2020) and the record low 22.6° (1984). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	77.5°	56.7°	22%	95° (2012)	42.8° (1974)
2	78.6°	57.6°	18%	96.4° (1960)	39.7° (1974)
3	78.4°	56.3°	20%	94.6° (2024)	38.3° (1974)
4	77.7°	56.3°	28%	97.3° (1960)	39.9° (1962)
5	78.1°	56.3°	18%	99° (2020)	37.4° (1965)
6	77°	54.9°	23%	96.6° (1978)	39.6° (2025)
7	75.9°	54.5°	18%	96.8° (2022)	38.1° (1986)
8	75°	53.6°	13%	89.1° (1979)	36.3° (2020)
9	74.5°	53.1°	15%	93.2° (1979)	29.1° (2020)
10	74.8°	53.1°	23%	93.4° (1998)	32° (1962)
11	72.9°	52.9°	30%	89.2° (2025)	30.4° (1989)
12	71.6°	52°	42%	92.1° (2004)	23.5° (2014)
13	69.4°	50°	27%	89.8° (2017)	31.5° (1970)
14	70.3°	49.8°	32%	90.9° (2020)	28.8° (1993)
15	71.2°	50.4°	33%	90.7° (2019)	32.2° (1970)
16	71.8°	50°	12%	89.2° (2019)	29.1° (1965)
17	71.4°	50.5°	30%	88.9° (2000)	26.1° (1965)
18	70.3°	49.6°	25%	90.9° (1998)	29.1° (1965)
19	69.6°	49.1°	28%	87.6° (2022)	29.1° (1991)
20	67.8°	47.7°	13%	86.9° (1960)	28.4° (1965)
21	65.7°	46.2°	27%	82.2° (2015)	24.4° (1995)
22	66.4°	46.2°	17%	89.2° (2007)	25.2° (1995)
23	67.1°	46.4°	27%	87.8° (1992)	25.7° (1965)
24	68.2°	46.9°	20%	90.9° (2020)	29.1° (1984)
25	69.6°	46.9°	25%	86.4° (2014)	26.6° (1984)
26	70.5°	47.8°	10%	94.1° (2024)	27° (1972)
27	67.3°	47.3°	17%	84.4° (2021)	28° (1984)
28	67.8°	46.8°	18%	88.3° (2025)	22.6° (1984)
29	67.6°	47.7°	18%	95.5° (2024)	24.3° (1985)
30	69.3°	47.3°	15%	87.3° (1989)	22.6° (1985)