Ottumwa, Iowa Climate

United States

Pop. 24,624 Elev. 205 m / 673 ft TZ: America/Chicago (UTC-5) ·

Ottumwa has a dry climate with warm summers reaching 88°F (31°C) in July and cold winters averaging 15°F (-9°C) in January. Humidity pushes the summer feels-like temperature to 102°F (39°C), while wind chill can drive winter lows to 7°F (-14°C). Rain falls on about 42 days per year (32.2 in / 817 mm total), with snow on 3 days and 27 in (682 mm) of annual accumulation. The city averages 132 sunny days per year and around 33 thunderstorm days.

Temperature 88°F (31°C) high 15°F (-9°C) low
Feels like 102°F (39°C) high 7°F (-14°C) low
Rain 42 days 32.2 in (817 mm) /yr
Snow 3 days 26.9 in (682 mm) /yr
Sky 132 sunny 33 stormy
Wind 2.6 mph (1.2 m/s) avg

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Monthly Climate Chart

↓ Monthly data table
Best months to visit: Mar, May, Aug, Sep, Oct

Sky & Air by Month

Cloud cover (%)
47
Jan
58
Feb
49
Mar
65
Apr
53
May
49
Jun
60
Jul
47
Aug
47
Sep
46
Oct
50
Nov
68
Dec
Humidity (%)
61
Jan
64
Feb
54
Mar
58
Apr
54
May
64
Jun
73
Jul
71
Aug
60
Sep
59
Oct
65
Nov
75
Dec

Weather Days by Month

↓ Weather days table

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Nearby Cities

Nearby

Commercial airport 64 mi Kirksville Regional Airport (IRK)
Ski resort 70 mi
National park 152 mi Effigy Mounds National Monument
Hospital 1 mi Ottumwa Regional Health Center
Hiking trail 17 mi Lake Trail

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Monthly Weather Data

↑ See chart
Month Avg High Avg Low Rainfall Snowfall Sunny Days
January 32°F 0°C 15°F -9°C 1.2 in 30 mm 3.3 in85 mm 12
February 35°F 2°C 18°F -8°C 0.1 in 2 mm 5.0 in127 mm 9
March 61°F 16°C 36°F 2°C 2.4 in 60 mm 3.1 in78 mm 12
April 66°F 19°C 45°F 7°C 6.5 in 166 mm 5
May 75°F 24°C 53°F 12°C 2.4 in 62 mm 10
June 86°F 30°C 66°F 19°C 5.1 in 129 mm 13
July 88°F 31°C 70°F 21°C 6.9 in 174 mm 9
August 83°F 28°C 64°F 18°C 2.3 in 58 mm 13
September 83°F 28°C 59°F 15°C 1.9 in 50 mm 13
October 72°F 22°C 52°F 11°C 1.9 in 47 mm 16
November 54°F 12°C 35°F 2°C 0.8 in 22 mm 8.6 in219 mm 13
December 37°F 3°C 20°F -7°C 0.7 in 17 mm 6.8 in173 mm 7

Weather Days by Month

↑ See chart
Month Sunny Days Storm Days
January 12 1
February 9 0
March 12 3
April 5 3
May 10 2
June 13 5
July 9 9
August 13 3
September 13 3
October 16 3
November 13 1
December 7 0