As of 02:11 CDT

Fort Thompson, SD weather in September

67°

Fort Thompson, Monday, 10 August, 02:11

Light rain. Feels like 67°. High 95°, low 66°.

Pressure29.88 inHg

Wind10.4 mph NE

Humidity57%

Visibility6.2 mi

Dew point53°

See detailed hourly forecast

In September, Fort Thompson, SD averages a high of 75.8° and a low of 56.8°. About 2.1 inches of precipitation fall over the month (6 wet days). The record high is 103.1° (1976) and the record low 28° (1965). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	82.2°	63.5°	22%	99.5° (1983)	47.1° (1965)
2	83.3°	63.1°	18%	102.2° (1983)	48° (1974)
3	82.8°	63.1°	23%	98.2° (2023)	43.2° (1974)
4	82.4°	62.8°	17%	98.6° (2023)	46° (1962)
5	81.5°	62.6°	18%	100.2° (1978)	44.6° (1965)
6	82°	61.5°	17%	103.1° (1976)	46.8° (2025)
7	79.5°	60.3°	28%	96.6° (1980)	43° (1986)
8	79.3°	59.9°	25%	95.9° (1977)	44.6° (1992)
9	78.8°	59.5°	15%	100.9° (1979)	43.9° (2020)
10	79.7°	59.2°	15%	98.1° (2012)	43.5° (2020)
11	78.1°	59.7°	22%	94.5° (2005)	42.1° (1989)
12	76.8°	58.6°	23%	96.6° (1981)	42.6° (1989)
13	74.5°	57.2°	25%	92.5° (1990)	40.1° (1989)
14	73.8°	55.9°	23%	93° (1969)	41.4° (1961)
15	74.5°	56.7°	22%	92.1° (2018)	41.9° (1961)
16	75.2°	56.7°	20%	93.4° (2018)	40.5° (1965)
17	74.7°	56.3°	23%	91.2° (1989)	38.5° (1965)
18	75°	56.1°	30%	94.6° (2000)	40.8° (1991)
19	74.1°	56.1°	25%	96.4° (1972)	37.9° (1991)
20	73°	54.3°	25%	91.2° (1960)	38.7° (1983)
21	71.1°	53.1°	23%	89.8° (1984)	37.4° (1995)
22	69.6°	51.8°	25%	85.6° (2013)	32.9° (1995)
23	70.7°	51.3°	27%	90.9° (2007)	35.1° (1965)
24	71.2°	52.2°	17%	85.5° (1990)	32.9° (1965)
25	71.8°	52.2°	18%	88° (1967)	35.2° (1984)
26	73.6°	52.3°	10%	95.2° (1974)	28° (1965)
27	71.1°	52°	12%	91.6° (1983)	36.5° (1984)
28	70.7°	51.1°	18%	90.9° (2021)	32.5° (1984)
29	71.6°	52°	18%	91.8° (2024)	30.9° (1984)
30	72.7°	52.2°	18%	90.5° (1989)	34° (1984)