Hanover, IL
Climate overview — based on NOAA 1991-2020 normals from ELIZABETH, IL US.
Year-round temperatures (°F)
Climate summary
Hanover has an annual average temperature of 47.5°F with about 39.4 inches of precipitation per year and 30.2 inches of snow. The warmest month is July (average high 83.3°F), and the coldest is January (average low 10.4°F). June is typically the wettest month (5.82 in) and January the driest (1.43 in). Snow typically falls from October through April.
Best time to visit Hanover
Full guide →Climate change signal
All-time records →108 of 366 (29.5%) of Hanover'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.
| 1980s | 65 | |
| 1990s | 87 | |
| 2000s | 49 | |
| 2010s | 91 | |
| 2020s | 74 |
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 | 28.0°F | 10.4°F | 19.2°F | 1.43 in | 8.4 in | 9 |
| February | 32.8°F | 14.3°F | 23.5°F | 1.74 in | 8.1 in | 8 |
| March | 45.5°F | 25.4°F | 35.5°F | 2.33 in | 3.5 in | 9 |
| April | 58.8°F | 35.8°F | 47.3°F | 3.85 in | 1.1 in | 11 |
| May | 70.2°F | 47.1°F | 58.6°F | 4.29 in | — | 12 |
| June | 79.8°F | 57.7°F | 68.8°F | 5.82 in | — | 12 |
| July | 83.3°F | 61.2°F | 72.2°F | 4.65 in | — | 10 |
| August | 81.4°F | 58.8°F | 70.1°F | 4.02 in | — | 9 |
| September | 74.6°F | 50.0°F | 62.3°F | 3.85 in | — | 9 |
| October | 62.1°F | 38.9°F | 50.5°F | 3.04 in | 0.3 in | 9 |
| November | 46.6°F | 27.8°F | 37.2°F | 2.44 in | 1.9 in | 8 |
| December | 33.6°F | 16.9°F | 25.3°F | 1.89 in | 6.9 in | 9 |
Climate twins of Hanover
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).