As of 02:11 CDT

Tiffin, IA weather in September

76°

Tiffin, Monday, 10 August, 02:11

Partly cloudy. Feels like 78°. High 90°, low 72°.

Pressure29.85 inHg

Wind5.1 mph S

Humidity94%

Visibility6.2 mi

Dew point73°

See detailed hourly forecast

In September, Tiffin, IA averages a high of 74.5° and a low of 57.6°. About 3.5 inches of precipitation fall over the month (8 wet days). The record high is 97.3° (2013) and the record low 32.5° (1984). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	79.3°	63°	30%	95.4° (1984)	47.8° (1967)
2	79.9°	63°	27%	93.9° (2000)	49.6° (1968)
3	78.8°	63°	28%	92.7° (2023)	46.4° (1974)
4	78.4°	61.5°	27%	93.2° (2023)	42.4° (1974)
5	78.8°	61°	18%	91.8° (1960)	46.2° (1962)
6	78.4°	61.7°	27%	92.5° (1960)	45.7° (1962)
7	78.8°	61.3°	28%	93° (2013)	44.8° (2025)
8	76.8°	60.3°	27%	90.7° (1971)	42.6° (1986)
9	76.6°	59.5°	25%	97.3° (2013)	45.5° (2008)
10	76.6°	59.2°	28%	94.8° (2013)	47.1° (1969)
11	77°	59°	23%	91.8° (2000)	44.6° (1992)
12	76.6°	59.5°	25%	89.1° (2021)	44.1° (2007)
13	75.2°	59.2°	30%	88.7° (2025)	38.7° (2014)
14	74.5°	57.7°	27%	91.8° (2025)	43.2° (2014)
15	73.6°	57.2°	23%	90.7° (2017)	39.9° (2007)
16	73.6°	57.2°	30%	90° (2017)	41° (2014)
17	74.1°	57.4°	25%	90° (1988)	44.8° (1981)
18	75°	57.7°	40%	86.4° (2000)	41.7° (1973)
19	74.5°	58.6°	43%	88.7° (2013)	38.5° (1991)
20	73.6°	57.2°	38%	89.6° (2022)	39° (1991)
21	71.8°	55.8°	28%	87.6° (2007)	40.8° (1983)
22	70.5°	54.5°	35%	88.9° (2017)	36.3° (1995)
23	69.4°	52.7°	23%	89.1° (2017)	36.3° (1983)
24	70.3°	53.4°	32%	86.7° (2007)	36° (1989)
25	70.9°	53.8°	33%	86.5° (2017)	39.7° (2001)
26	70.7°	53.1°	30%	85.1° (2020)	36° (1984)
27	70.3°	53.1°	17%	86.9° (2021)	37.9° (1985)
28	69.1°	52.7°	28%	85.5° (1971)	38.3° (1964)
29	70.3°	52°	30%	86.7° (2025)	32.5° (1984)
30	71.2°	52.9°	15%	88.2° (2023)	36.5° (1972)