Garnavillo, IA
Climate overview — based on NOAA 1991-2020 normals from GUTTENBERG L&D 10, IA US.
Year-round temperatures (°F)
Climate summary
Garnavillo has an annual average temperature of 48.5°F with about 37.3 inches of precipitation per year and 34.4 inches of snow. The warmest month is July (average high 83.8°F), and the coldest is January (average low 10.3°F). June is typically the wettest month (5.70 in) and February the driest (1.23 in). Snow typically falls from October through April.
Best time to visit Garnavillo
Full guide →Climate change signal
All-time records →54 of 366 (14.8%) of Garnavillo'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.
| 1930s | 11 | |
| 1940s | 25 | |
| 1950s | 49 | |
| 1960s | 23 | |
| 1970s | 28 | |
| 1980s | 58 | |
| 1990s | 34 | |
| 2000s | 48 | |
| 2010s | 57 | |
| 2020s | 33 |
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 | 27.9°F | 10.3°F | 19.1°F | 1.33 in | 10.0 in | 9 |
| February | 32.8°F | 14.0°F | 23.4°F | 1.23 in | 9.3 in | 8 |
| March | 45.2°F | 26.7°F | 36.0°F | 1.98 in | 3.7 in | 9 |
| April | 59.3°F | 38.7°F | 49.0°F | 3.65 in | 0.7 in | 11 |
| May | 71.0°F | 50.0°F | 60.5°F | 4.58 in | — | 12 |
| June | 80.4°F | 60.1°F | 70.3°F | 5.70 in | — | 11 |
| July | 83.8°F | 64.1°F | 73.9°F | 4.85 in | — | 9 |
| August | 81.6°F | 61.8°F | 71.7°F | 3.61 in | — | 9 |
| September | 74.7°F | 53.7°F | 64.2°F | 3.75 in | — | 9 |
| October | 61.4°F | 41.5°F | 51.5°F | 2.81 in | 0.3 in | 9 |
| November | 46.0°F | 29.1°F | 37.5°F | 2.13 in | 1.2 in | 8 |
| December | 33.0°F | 17.6°F | 25.3°F | 1.66 in | 9.2 in | 9 |
Climate twins of Garnavillo
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).