As of 18:37 CDT

Duluth, MN weather in September

77°

Duluth, Saturday, 8 August, 18:37

Clear. Feels like 77°. High 78°, low 54°.

Pressure29.85 inHg

Wind11 mph W

Humidity50%

Visibility6.2 mi

Dew point57°

See detailed hourly forecast

In September, Duluth, MN averages a high of 65.6° and a low of 54.9°. About 3.5 inches of precipitation fall over the month (11 wet days). The record high is 95.4° (2023) and the record low 29.5° (1965). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	71.6°	60.6°	32%	84.9° (2011)	46.9° (1974)
2	71.4°	60.6°	25%	87.8° (2023)	46.2° (1974)
3	70.9°	60.3°	30%	95.4° (2023)	45.5° (1974)
4	70.7°	59.5°	35%	88.5° (2023)	43.2° (2025)
5	70.3°	59.5°	37%	86° (2023)	43.5° (2025)
6	70.3°	58.8°	37%	85.6° (1960)	42.8° (2025)
7	68.9°	58.1°	40%	88° (1976)	42.4° (2025)
8	68°	57°	23%	84.7° (2022)	43° (2020)
9	67.6°	56.8°	43%	83.1° (1961)	45.7° (2020)
10	67.8°	56.7°	32%	83.3° (2005)	41.7° (2020)
11	68.4°	57°	28%	82.4° (2024)	43.2° (1964)
12	67.3°	56.7°	37%	80.2° (1976)	42.4° (1975)
13	65.8°	55.6°	30%	79.9° (2017)	40.1° (1975)
14	64.8°	54.3°	30%	77.2° (2018)	42.6° (2007)
15	65.1°	54.5°	38%	81.3° (2022)	41.5° (2011)
16	66.6°	54.9°	38%	83.8° (2025)	46.6° (1970)
17	66.2°	54.9°	37%	83.8° (2024)	41.5° (2020)
18	65.7°	55°	38%	83.3° (2024)	40.5° (2020)
19	65.7°	55.4°	45%	84.2° (2021)	38.5° (1991)
20	63.9°	53.4°	42%	81.5° (2022)	40.3° (1991)
21	62.8°	52.3°	37%	80.1° (2024)	39.6° (1974)
22	61.2°	51.1°	43%	81° (2017)	35.8° (1995)
23	61.2°	50.7°	40%	80.1° (2017)	39° (1983)
24	62.2°	51.1°	42%	83.1° (2017)	39.6° (2000)
25	61.7°	51.1°	38%	76.8° (2025)	37.9° (1965)
26	61.5°	50.9°	37%	77.7° (2024)	29.5° (1965)
27	61.2°	50.7°	30%	80.1° (2024)	37.9° (1965)
28	60.8°	49.6°	33%	76.6° (2024)	36° (1984)
29	59.5°	49.6°	37%	76.5° (2025)	34.3° (2018)
30	60.3°	49.6°	28%	78.8° (2024)	37.2° (2003)