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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Explore on the MapMonthly Climate Chart
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
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →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 |