Hartley, Iowa Climate

United States

Pop. 1,616 Elev. 444 m / 1,457 ft TZ: America/Chicago (UTC-5) ·

Hartley has harsh winters with January lows averaging 10°F (-12°C), and mild summers with July highs of 83°F (28°C). Humidity pushes the summer feels-like temperature to 90°F (32°C), while wind chill can drive winter lows to 0°F (-18°C). Rain falls on about 41 days per year (29.8 in / 758 mm total), with snow on 5 days and 34 in (869 mm) of annual accumulation. The city averages 136 sunny days per year and around 27 thunderstorm days. Nearby lake water reaches 76°F (24°C) in summer.

Temperature 83°F (28°C) high 10°F (-12°C) low
Feels like 90°F (32°C) high 0°F (-18°C) low
Rain 41 days 29.8 in (758 mm) /yr
Snow 5 days 34.2 in (869 mm) /yr
Sky 136 sunny 27 stormy
Wind 3.0 mph (1.3 m/s) avg

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Monthly Climate Chart

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

Sky & Air by Month

Cloud cover (%)
44
Jan
55
Feb
50
Mar
56
Apr
43
May
56
Jun
51
Jul
47
Aug
46
Sep
47
Oct
59
Nov
74
Dec
Humidity (%)
61
Jan
63
Feb
60
Mar
55
Apr
53
May
69
Jun
78
Jul
78
Aug
69
Sep
62
Oct
68
Nov
80
Dec

Weather Days by Month

↓ Weather days table

Water Temperatures

↓ Water temperatures table

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Nearby Cities

Nearby

Commercial airport 71 mi Sioux Gateway Airport / Brigadier General Bud Day Field (SUX)
Ski resort 66 mi Great Bear Recreation Park
National park 72 mi Pipestone National Monument
Mountain peak (20,733 ft) 283 mi Norris Hill
Hospital 10 mi
Hiking trail 70 mi Lake Loop

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Monthly Weather Data

↑ See chart
Month Avg High Avg Low Rainfall Snowfall Sunny Days
January 30°F -1°C 10°F -12°C 0.0 in 0 mm 1.3 in32 mm 16
February 30°F -1°C 11°F -12°C 0.0 in 1 mm 3.5 in89 mm 8
March 56°F 13°C 30°F -1°C 2.4 in 62 mm 12.1 in307 mm 13
April 63°F 17°C 39°F 4°C 3.5 in 90 mm 0.4 in10 mm 13
May 72°F 22°C 49°F 10°C 4.6 in 117 mm 15
June 82°F 28°C 62°F 17°C 6.5 in 164 mm 8
July 83°F 28°C 66°F 19°C 6.3 in 159 mm 11
August 79°F 26°C 63°F 17°C 1.6 in 41 mm 12
September 78°F 26°C 56°F 14°C 1.8 in 45 mm 13
October 66°F 19°C 47°F 8°C 2.0 in 51 mm 14
November 48°F 9°C 31°F 0°C 0.8 in 19 mm 8.4 in213 mm 10
December 32°F 0°C 14°F -10°C 0.3 in 9 mm 8.6 in219 mm 3

Weather Days by Month

↑ See chart
Month Sunny Days Storm Days
January 16 0
February 8 0
March 13 1
April 13 4
May 15 3
June 8 7
July 11 6
August 12 2
September 13 2
October 14 1
November 10 1
December 3 0

Water Temperatures Data

↑ See chart
Month Lake Avg High
January 32°F 0°C
February 32°F 0°C
March 34°F 1°C
April 45°F 7°C
May 57°F 14°C
June 68°F 20°C
July 76°F 24°C
August 74°F 23°C
September 67°F 19°C
October 57°F 14°C
November 41°F 5°C
December 32°F 0°C