Decorah, Iowa Climate
United States
Pop. 7,907 Elev. 271 m / 889 ft
TZ: America/Chicago (UTC-5) ·
Winters in Decorah are severe, with temperatures dropping to 10°F (-12°C) in January, while summers bring mild highs of 82°F (28°C) in July. Humidity pushes the summer feels-like temperature to 89°F (32°C), while wind chill can drive winter lows to 0°F (-18°C). Expect around 49 rainy days annually (33.4 in / 847 mm total), with snow on 7 days and 40 in (1025 mm) of annual accumulation. The city averages 112 sunny days per year and around 36 thunderstorm days. Nearby lake water reaches 76°F (25°C) in summer.
| Temperature | 82°F (28°C) high | 10°F (-12°C) low |
| Feels like | 89°F (31°C) high | 0°F (-18°C) low |
| Rain | 49 days | 33.4 in (847 mm) /yr |
| Snow | 7 days | 40.4 in (1025 mm) /yr |
| Sky | 112 sunny | 36 stormy |
| Wind | 2.7 mph (1.2 m/s) avg |
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Explore on the MapMonthly Climate Chart
Best months to visit: May, Sep, Oct
Sky & Air by Month
Cloud cover (%)
48
Jan 59
Feb 53
Mar 65
Apr 49
May 58
Jun 57
Jul 55
Aug 50
Sep 45
Oct 59
Nov 77
Dec Humidity (%)
62
Jan 63
Feb 59
Mar 61
Apr 60
May 70
Jun 78
Jul 77
Aug 73
Sep 67
Oct 69
Nov 80
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 48 mi La Crosse Regional Airport (LSE)
Ski resort 43 mi Mt. La Crosse
National park 35 mi Effigy Mounds National Monument
Mountain peak
(20,733 ft) 329 mi Norris Hill
Hospital 1 mi Winneshiek Medical Center
Hiking trail 43 mi Lost Creek Trail
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 28°F -2°C | 10°F -12°C | 0.0 in 0 mm | 1.3 in33 mm | 11 |
| February | 29°F -2°C | 14°F -10°C | 0.2 in 6 mm | 6.5 in166 mm | 8 |
| March | 54°F 12°C | 31°F 0°C | 3.0 in 76 mm | 12.0 in305 mm | 11 |
| April | 59°F 15°C | 38°F 4°C | 6.1 in 155 mm | 1.1 in27 mm | 3 |
| May | 69°F 21°C | 49°F 10°C | 2.7 in 69 mm | — | 16 |
| June | 80°F 27°C | 63°F 17°C | 5.5 in 139 mm | — | 9 |
| July | 82°F 28°C | 66°F 19°C | 7.4 in 187 mm | — | 10 |
| August | 78°F 26°C | 61°F 16°C | 4.2 in 106 mm | — | 9 |
| September | 76°F 24°C | 56°F 13°C | 1.4 in 35 mm | — | 12 |
| October | 64°F 18°C | 46°F 8°C | 1.5 in 38 mm | — | 11 |
| November | 46°F 8°C | 32°F 0°C | 0.9 in 23 mm | 9.6 in243 mm | 9 |
| December | 28°F -2°C | 13°F -10°C | 0.5 in 14 mm | 9.9 in251 mm | 3 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 11 | 0 |
| February | 8 | 1 |
| March | 11 | 3 |
| April | 3 | 4 |
| May | 16 | 1 |
| June | 9 | 8 |
| July | 10 | 8 |
| August | 9 | 5 |
| September | 12 | 3 |
| October | 11 | 2 |
| November | 9 | 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 | 44°F 7°C |
| May | 55°F 13°C |
| June | 69°F 21°C |
| July | 76°F 25°C |
| August | 73°F 23°C |
| September | 66°F 19°C |
| October | 57°F 14°C |
| November | 42°F 5°C |
| December | 32°F 0°C |