Decorah, IA
Climate overview — based on NOAA 1991-2020 normals from DECORAH, IA US.
Year-round temperatures (°F)
Climate summary
Decorah has an annual average temperature of 48.5°F with about 37.6 inches of precipitation per year and 37.5 inches of snow. The warmest month is July (average high 84.4°F), and the coldest is January (average low 10.4°F). June is typically the wettest month (6.13 in) and January the driest (1.01 in). Snow typically falls from November through April.
Best time to visit Decorah
Full guide →Climate change signal
All-time records →65 of 366 (17.8%) of Decorah's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.
| 1890s | 19 | |
| 1900s | 16 | |
| 1910s | 36 | |
| 1920s | 13 | |
| 1930s | 76 | |
| 1940s | 11 | |
| 1950s | 17 | |
| 1960s | 14 | |
| 1970s | 2 | |
| 1980s | 21 | |
| 1990s | 26 | |
| 2000s | 31 | |
| 2010s | 32 | |
| 2020s | 52 |
Bars: number of all-time daily heat records still standing that were set in each decade.
Monthly averages
| Month | Avg High | Avg Low | Avg Temp | Precipitation | Snow | Rainy days |
|---|---|---|---|---|---|---|
| January | 27.7°F | 10.4°F | 19.0°F | 1.01 in | 10.3 in | 8 |
| February | 32.8°F | 14.0°F | 23.4°F | 1.10 in | 8.3 in | 6 |
| March | 46.2°F | 25.9°F | 36.0°F | 2.05 in | 5.7 in | 8 |
| April | 61.3°F | 37.3°F | 49.3°F | 3.95 in | 1.7 in | 12 |
| May | 72.5°F | 48.4°F | 60.5°F | 4.94 in | — | 13 |
| June | 81.4°F | 58.6°F | 70.0°F | 6.13 in | — | 12 |
| July | 84.4°F | 62.6°F | 73.5°F | 4.42 in | — | 10 |
| August | 82.7°F | 60.7°F | 71.7°F | 4.39 in | — | 10 |
| September | 76.4°F | 52.3°F | 64.4°F | 3.60 in | — | 9 |
| October | 63.2°F | 40.4°F | 51.8°F | 2.66 in | — | 9 |
| November | 46.6°F | 28.4°F | 37.5°F | 2.05 in | 2.4 in | 8 |
| December | 32.9°F | 17.4°F | 25.2°F | 1.31 in | 9.1 in | 8 |
Climate twins of Decorah
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).