As of 05:25 CDT

Thief River Falls, MN weather in September

59°

Thief River Falls, Sunday, 9 August, 05:25

Overcast. Feels like 59°. High 78°, low 59°.

Pressure29.88 inHg

Wind4.1 mph E

Humidity79%

Visibility6.2 mi

Dew point52°

See detailed hourly forecast

In September, Thief River Falls, MN averages a high of 66.6° and a low of 50.9°. About 2.7 inches of precipitation fall over the month (9 wet days). The record high is 94.8° (1983) and the record low 23.2° (1965). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	72.7°	57°	38%	88.7° (1983)	39.6° (1974)
2	72.5°	56.7°	32%	94.8° (1983)	38.3° (1974)
3	73.2°	56.5°	22%	87.4° (1971)	40.3° (1974)
4	72.3°	56.7°	27%	92.3° (2023)	39.7° (2025)
5	71.8°	56.3°	27%	90.9° (1978)	40.6° (1965)
6	71.2°	54.7°	37%	90.5° (1976)	38.3° (1968)
7	70.3°	53.6°	33%	90° (1976)	37.4° (2025)
8	69.4°	53.2°	28%	88.3° (1978)	36.7° (2020)
9	68.9°	52.9°	25%	84.9° (1994)	36.1° (2020)
10	69.3°	53.4°	28%	89.1° (1998)	39.2° (1989)
11	68.7°	52.5°	32%	86.2° (1990)	35.1° (1964)
12	67.8°	52.2°	32%	85.6° (2017)	36.1° (2014)
13	66.2°	51.6°	35%	85.5° (2017)	33.6° (1970)
14	65.3°	50°	23%	82.8° (2025)	36.9° (2007)
15	66.6°	50.5°	32%	81.1° (2015)	33.6° (2011)
16	67.5°	51.8°	33%	85.5° (2018)	36.7° (1973)
17	66.7°	51.3°	25%	84.6° (2019)	36° (2020)
18	66.7°	50.7°	32%	82.4° (1998)	33.6° (1971)
19	66.2°	51.3°	33%	84.7° (2004)	32.4° (1991)
20	63.7°	49.8°	33%	83.1° (2019)	31.3° (1995)
21	62.4°	48.6°	38%	82.9° (2015)	32.9° (1995)
22	61.5°	46.4°	30%	78.4° (2020)	27.9° (1974)
23	62.2°	46°	22%	81° (2007)	31.8° (1989)
24	63.3°	47.5°	33%	77.7° (1990)	32.5° (1985)
25	62.6°	46.9°	18%	77.5° (2024)	28.6° (1965)
26	63.3°	46.6°	32%	79.7° (1990)	23.2° (1965)
27	61.5°	45.7°	23%	79.5° (2014)	31.6° (1967)
28	60.6°	44.6°	27%	82.4° (2021)	29.3° (1984)
29	61.5°	45.5°	22%	83.8° (2021)	28° (2018)
30	62.1°	46°	18%	80.4° (2012)	31.3° (1974)