As of 08:24 CDT

Ottumwa, IA weather in August

76°

Ottumwa, Sunday, 9 August, 08:24

Overcast. Feels like 78°. High 99°, low 70°.

Pressure29.88 inHg

Wind1 mph E

Humidity89%

Visibility6.2 mi

Dew point72°

See detailed hourly forecast

In August, Ottumwa, IA averages a high of 83.1° and a low of 66.4°. About 3.7 inches of precipitation fall over the month (10 wet days). The record high is 102.7° (1988) and the record low 46.4° (1986). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	84.6°	67.1°	23%	100.4° (1987)	55.4° (1968)
2	84.6°	68°	30%	99.9° (2011)	56.5° (2009)
3	84.4°	67.3°	37%	99° (1988)	54.5° (1976)
4	83.7°	67.5°	38%	98.4° (1988)	52.3° (1978)
5	82.6°	66.9°	35%	97.5° (2018)	52.5° (1978)
6	83.3°	66.7°	35%	97.7° (2022)	53.8° (2004)
7	83.8°	67.3°	40%	98.8° (2012)	53.1° (1990)
8	84.2°	67.6°	28%	99.7° (1988)	54.9° (1976)
9	84°	67.6°	30%	94.1° (2005)	53.1° (1972)
10	82.9°	66.9°	38%	99.1° (1983)	54.7° (2024)
11	82°	64.9°	23%	95° (1988)	54.1° (1968)
12	82.8°	65.5°	33%	96.1° (1975)	52.3° (2004)
13	82.8°	66.2°	28%	94.1° (1965)	53.8° (1992)
14	82°	66°	28%	101.3° (1988)	52.2° (2004)
15	82.4°	66°	33%	102.7° (1988)	48.9° (1992)
16	83.3°	66.4°	35%	102.4° (1988)	52.7° (1992)
17	83.7°	67.1°	28%	102.2° (1988)	55.6° (1992)
18	83.8°	66.6°	47%	100.6° (1983)	51.4° (1977)
19	82.6°	66.7°	32%	97.3° (1983)	55.4° (1963)
20	82.8°	65.8°	35%	99.3° (2003)	50.7° (1967)
21	82.9°	66.6°	27%	96.1° (1983)	55° (2004)
22	83.3°	66°	25%	94.8° (2012)	55.4° (2024)
23	82.6°	66°	23%	95.9° (2023)	53.6° (1966)
24	82.9°	66.2°	20%	96.1° (2023)	52.5° (1966)
25	83.5°	66°	35%	99.9° (2003)	53.4° (2025)
26	83.3°	66.6°	32%	97.7° (1983)	49.6° (2025)
27	82.9°	67.5°	30%	96.6° (2013)	55° (1967)
28	82.8°	65.7°	33%	98.2° (1984)	46.4° (1986)
29	82.9°	65.7°	32%	97° (1984)	49.5° (1986)
30	81.7°	65.1°	25%	99.7° (2013)	51.3° (2009)
31	81.3°	64.2°	22%	96.6° (2000)	48.2° (2009)