As of 09:29 MDT

Porcupine, SD weather in September

76°

Porcupine, Sunday, 9 August, 09:29

Mostly clear. Feels like 75°. High 96°, low 66°.

Pressure29.85 inHg

Wind10 mph NE

Humidity48%

Visibility6.2 mi

Dew point53°

See detailed hourly forecast

In September, Porcupine, SD averages a high of 75.2° and a low of 54°. About 1.6 inches of precipitation fall over the month (6 wet days). The record high is 100.4° (1960) and the record low 23.9° (1985). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	81.5°	60.1°	20%	97.3° (2012)	45° (1965)
2	82°	60.6°	17%	99.3° (1960)	41.2° (1974)
3	81.9°	60.3°	13%	96.4° (1960)	41.2° (1974)
4	82°	59.5°	17%	100.4° (1960)	41.2° (1962)
5	81.1°	60.1°	17%	98.2° (2020)	41.7° (1965)
6	81°	58.8°	12%	98.2° (2002)	41.2° (2025)
7	79.3°	57.9°	23%	98.4° (2022)	43.3° (2020)
8	79.2°	57.2°	17%	95.5° (1979)	35.8° (2020)
9	77.9°	57.4°	13%	98.8° (1979)	37.4° (2020)
10	78.6°	56.8°	25%	96.6° (2012)	36.7° (1962)
11	76.8°	56.7°	23%	92.7° (2024)	32.5° (1989)
12	75.6°	55.8°	30%	95.2° (2004)	33.4° (2014)
13	73.6°	53.4°	22%	90.1° (2015)	33.8° (1970)
14	73.2°	53.1°	30%	93.7° (2015)	31.6° (1993)
15	74.5°	54°	28%	92.1° (2018)	37.9° (1973)
16	75°	53.8°	17%	91.2° (2007)	31.8° (1965)
17	75°	53.6°	25%	94.6° (2000)	27.7° (1965)
18	73.9°	52.9°	27%	91.8° (1998)	32.9° (1965)
19	73°	52.2°	25%	92.3° (1972)	32.9° (1965)
20	72°	51.4°	17%	92.7° (2010)	30.4° (1965)
21	69.3°	49.3°	28%	88.2° (2013)	29.7° (1995)
22	69.3°	49.1°	33%	91.6° (2007)	28.8° (1995)
23	70.2°	49.5°	28%	91.6° (2007)	29.3° (1965)
24	70.9°	49.1°	18%	91.6° (1992)	29.8° (1965)
25	71.8°	49.6°	25%	88.7° (1964)	25.5° (1984)
26	73.4°	50.4°	5%	92.1° (2024)	29.1° (1965)
27	70.7°	50°	13%	86.4° (2021)	32.9° (1967)
28	70.9°	49.1°	17%	90.9° (2024)	24.6° (1984)
29	70.9°	50°	15%	91.4° (2024)	24.1° (1985)
30	72°	50°	15%	91.4° (1967)	23.9° (1985)