Knoxville, Iowa Climate
United States
Pop. 7,248 Elev. 276 m / 906 ft
TZ: America/Chicago (UTC-5) ·
Knoxville is largely arid, with warm summers peaking at 87°F (31°C) in July and cold winters around 15°F (-9°C) in January. Humidity pushes the summer feels-like temperature to 100°F (38°C), while wind chill can drive winter lows to 6°F (-14°C). Precipitation occurs on roughly 46 days per year (31.3 in / 794 mm total), with snow on 3 days and 28 in (707 mm) of annual accumulation. The city averages 142 sunny days per year and around 34 thunderstorm days. Nearby lake water reaches 80°F (27°C) in summer.
| Temperature | 87°F (31°C) high | 15°F (-9°C) low |
| Feels like | 100°F (38°C) high | 6°F (-14°C) low |
| Rain | 46 days | 31.3 in (794 mm) /yr |
| Snow | 3 days | 27.8 in (707 mm) /yr |
| Sky | 142 sunny | 34 stormy |
| Wind | 2.7 mph (1.2 m/s) avg |
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Explore on the MapMonthly Climate Chart
Best months to visit: Mar, May, Aug, Sep, Oct
Sky & Air by Month
Cloud cover (%)
45
Jan 57
Feb 48
Mar 64
Apr 52
May 49
Jun 58
Jul 46
Aug 48
Sep 47
Oct 52
Nov 67
Dec Humidity (%)
60
Jan 65
Feb 55
Mar 58
Apr 54
May 63
Jun 75
Jul 72
Aug 62
Sep 61
Oct 66
Nov 75
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 32 mi Des Moines International Airport (DSM)
Ski resort 29 mi
National park 153 mi Effigy Mounds National Monument
Hospital 1 mi Knoxville Hospital
Hiking trail 24 mi Corner Pocket
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 33°F 0°C | 15°F -9°C | 0.8 in 20 mm | 2.5 in64 mm | 14 |
| February | 34°F 1°C | 17°F -8°C | 0.1 in 1 mm | 5.3 in135 mm | 10 |
| March | 62°F 16°C | 36°F 2°C | 2.5 in 65 mm | 3.2 in82 mm | 15 |
| April | 65°F 18°C | 45°F 7°C | 4.9 in 125 mm | — | 5 |
| May | 74°F 23°C | 53°F 12°C | 2.7 in 68 mm | — | 11 |
| June | 86°F 30°C | 66°F 19°C | 5.1 in 130 mm | — | 14 |
| July | 87°F 31°C | 70°F 21°C | 7.8 in 199 mm | — | 10 |
| August | 82°F 28°C | 65°F 18°C | 1.7 in 44 mm | — | 15 |
| September | 82°F 28°C | 59°F 15°C | 1.7 in 42 mm | — | 14 |
| October | 71°F 22°C | 51°F 11°C | 2.4 in 61 mm | — | 15 |
| November | 53°F 12°C | 35°F 2°C | 0.8 in 22 mm | 9.7 in246 mm | 12 |
| December | 37°F 3°C | 19°F -7°C | 0.6 in 16 mm | 7.1 in181 mm | 7 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 14 | 1 |
| February | 10 | 0 |
| March | 15 | 2 |
| April | 5 | 4 |
| May | 11 | 2 |
| June | 14 | 5 |
| July | 10 | 10 |
| August | 15 | 2 |
| September | 14 | 3 |
| October | 15 | 4 |
| November | 12 | 1 |
| December | 7 | 0 |
Water Temperatures Data
↑ See chart| Month | Lake Avg High |
|---|---|
| January | 32°F 0°C |
| February | 32°F 0°C |
| March | 41°F 5°C |
| April | 53°F 12°C |
| May | 62°F 17°C |
| June | 74°F 23°C |
| July | 80°F 27°C |
| August | 76°F 24°C |
| September | 70°F 21°C |
| October | 59°F 15°C |
| November | 43°F 6°C |
| December | 32°F 0°C |