Zion, IL
Climate overview — based on NOAA 1991-2020 normals from CHICAGO WAUKEGAN RGNL AP, IL US.
Year-round temperatures (°F)
Climate summary
Zion has an annual average temperature of 48.3°F with about 35.3 inches of precipitation per year. The warmest month is July (average high 81.3°F), and the coldest is January (average low 16.0°F). June is typically the wettest month (4.45 in) and January the driest (1.41 in).
Best time to visit Zion
Full guide →Climate change signal
All-time records →179 of 366 (48.9%) of Zion'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.
| 1990s | 5 | |
| 2000s | 115 | |
| 2010s | 137 | |
| 2020s | 109 |
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 | 30.9°F | 16.0°F | 23.4°F | 1.41 in | — | 8 |
| February | 34.1°F | 18.4°F | 26.3°F | 1.52 in | — | 9 |
| March | 44.3°F | 26.9°F | 35.6°F | 2.22 in | — | 11 |
| April | 55.5°F | 36.0°F | 45.8°F | 3.77 in | — | 12 |
| May | 66.6°F | 45.9°F | 56.3°F | 3.92 in | — | 14 |
| June | 76.6°F | 56.1°F | 66.3°F | 4.45 in | — | 12 |
| July | 81.3°F | 61.9°F | 71.6°F | 3.48 in | — | 10 |
| August | 80.0°F | 61.1°F | 70.5°F | 3.59 in | — | 13 |
| September | 73.1°F | 53.6°F | 63.4°F | 3.57 in | — | 12 |
| October | 60.9°F | 42.7°F | 51.8°F | 3.25 in | — | 12 |
| November | 47.5°F | 31.4°F | 39.5°F | 2.26 in | — | 10 |
| December | 35.9°F | 21.8°F | 28.9°F | 1.86 in | — | 9 |
Climate twins of Zion
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).