Mount Zion, IL
Climate overview — based on NOAA 1991-2020 normals from DECATUR AP, IL US.
Year-round temperatures (°F)
Climate summary
Mount Zion has an annual average temperature of 53.1°F with about 36.4 inches of precipitation per year. The warmest month is July (average high 85.8°F), and the coldest is January (average low 20.1°F). May is typically the wettest month (4.38 in) and February the driest (1.84 in).
Best time to visit Mount Zion
Full guide →Climate change signal
All-time records →144 of 366 (39.3%) of Mount 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.
| 2000s | 124 | |
| 2010s | 149 | |
| 2020s | 93 |
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 | 34.7°F | 20.1°F | 27.4°F | 1.99 in | — | 8 |
| February | 39.8°F | 23.4°F | 31.6°F | 1.84 in | — | 7 |
| March | 51.9°F | 32.4°F | 42.1°F | 2.51 in | — | 11 |
| April | 63.9°F | 42.3°F | 53.1°F | 3.66 in | — | 11 |
| May | 74.4°F | 53.4°F | 63.9°F | 4.38 in | — | 13 |
| June | 83.0°F | 62.4°F | 72.7°F | 4.38 in | — | 11 |
| July | 85.8°F | 65.6°F | 75.7°F | 3.32 in | — | 10 |
| August | 84.3°F | 63.1°F | 73.7°F | 3.03 in | — | 9 |
| September | 78.9°F | 55.0°F | 67.0°F | 2.98 in | — | 9 |
| October | 66.1°F | 44.4°F | 55.2°F | 3.18 in | — | 10 |
| November | 51.3°F | 34.2°F | 42.7°F | 2.97 in | — | 9 |
| December | 39.7°F | 25.2°F | 32.4°F | 2.12 in | — | 9 |
Climate twins of Mount Zion
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).