Geneseo, IL
Climate overview — based on NOAA 1991-2020 normals from GENESEO, IL US.
Year-round temperatures (°F)
Climate summary
Geneseo has an annual average temperature of 50.9°F with about 39.1 inches of precipitation per year and 28.4 inches of snow. The warmest month is July (average high 85.7°F), and the coldest is January (average low 14.6°F). May is typically the wettest month (4.87 in) and January the driest (1.64 in). Snow typically falls from November through April.
Best time to visit Geneseo
Full guide →Climate change signal
All-time records →49 of 366 (13.4%) of Geneseo'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 | 5 | |
| 1900s | 26 | |
| 1920s | 0 | |
| 1930s | 0 | |
| 1940s | 34 | |
| 1950s | 6 | |
| 1960s | 38 | |
| 1970s | 42 | |
| 1980s | 47 | |
| 1990s | 35 | |
| 2000s | 42 | |
| 2010s | 62 | |
| 2020s | 29 |
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 | 30.8°F | 14.6°F | 22.7°F | 1.64 in | 9.8 in | 8 |
| February | 35.7°F | 18.6°F | 27.2°F | 1.81 in | 6.1 in | 7 |
| March | 48.9°F | 29.3°F | 39.1°F | 2.70 in | 2.8 in | 9 |
| April | 62.2°F | 39.9°F | 51.1°F | 3.96 in | 0.7 in | 11 |
| May | 73.7°F | 51.6°F | 62.6°F | 4.87 in | — | 12 |
| June | 82.8°F | 61.5°F | 72.2°F | 4.42 in | — | 10 |
| July | 85.7°F | 65.1°F | 75.4°F | 4.13 in | — | 8 |
| August | 83.4°F | 62.9°F | 73.1°F | 4.10 in | — | 9 |
| September | 77.1°F | 54.5°F | 65.8°F | 3.57 in | — | 8 |
| October | 64.0°F | 42.9°F | 53.4°F | 3.21 in | 0.1 in | 9 |
| November | 48.8°F | 30.7°F | 39.8°F | 2.56 in | 1.6 in | 8 |
| December | 35.9°F | 20.5°F | 28.2°F | 2.12 in | 7.3 in | 8 |
Climate twins of Geneseo
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).