Hennepin, IL
Climate overview — based on NOAA 1991-2020 normals from HENNEPIN, IL US.
Year-round temperatures (°F)
Climate summary
Hennepin has an annual average temperature of 51.4°F with about 38.6 inches of precipitation per year. The warmest month is July (average high 84.5°F), and the coldest is January (average low 16.8°F). May is typically the wettest month (4.76 in) and February the driest (1.80 in).
Best time to visit Hennepin
Full guide →Climate change signal
All-time records →265 of 366 (72.4%) of Hennepin'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.
| 2010s | 203 | |
| 2020s | 163 |
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 | 32.3°F | 16.8°F | 24.6°F | 1.95 in | — | — |
| February | 37.1°F | 20.1°F | 28.6°F | 1.80 in | — | — |
| March | 50.1°F | 30.1°F | 40.1°F | 2.46 in | — | — |
| April | 63.5°F | 40.5°F | 52.0°F | 3.85 in | — | — |
| May | 73.7°F | 51.3°F | 62.5°F | 4.76 in | — | — |
| June | 81.7°F | 61.4°F | 71.6°F | 4.55 in | — | — |
| July | 84.5°F | 64.5°F | 74.5°F | 3.89 in | — | — |
| August | 82.9°F | 62.4°F | 72.7°F | 3.77 in | — | — |
| September | 77.1°F | 54.5°F | 65.8°F | 3.45 in | — | — |
| October | 65.2°F | 43.0°F | 54.1°F | 3.31 in | — | — |
| November | 49.9°F | 32.3°F | 41.1°F | 2.60 in | — | — |
| December | 36.7°F | 21.8°F | 29.3°F | 2.19 in | — | — |
Climate twins of Hennepin
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).