Mount Zion, IL Weather & Climate Normals
What a normal year in Mount Zion actually looks like
On the 30-year record NOAA keeps for Mount Zion, IL, the comfort score comes out to 49/100, strongly seasonal: Comfortable weather is limited to a shorter window; summers, winters, or precipitation swing wide. Only 5 months a year land in the 55–75°F range this site treats as mild.
How much Mount Zion's weather actually swings
Average temperatures in Mount Zion run from 27°F in Jan up to 76°F in Jul, a 48.3°F seasonal swing, one of the widest gaps in this dataset.
Mount Zion, month by month
| Month | Avg high | Avg low | Precip |
|---|---|---|---|
| Jan | 35°F | 20°F | 1.99in |
| Feb | 40°F | 23°F | 1.84in |
| Mar | 52°F | 32°F | 2.51in |
| Apr | 64°F | 42°F | 3.66in |
| May | 74°F | 53°F | 4.38in |
| Jun | 83°F | 62°F | 4.38in |
| Jul | 86°F | 66°F | 3.32in |
| Aug | 84°F | 63°F | 3.03in |
| Sep | 79°F | 55°F | 2.98in |
| Oct | 66°F | 44°F | 3.18in |
| Nov | 51°F | 34°F | 2.97in |
| Dec | 40°F | 25°F | 2.12in |
If you're timing a visit, May, Jun, Aug, Sep, and Oct are Mount Zion's mildest stretch; if you're moving there, you should plan around Jul's heat and Jan's cold instead.
How wet Mount Zion actually gets
Mount Zion averages 36.36in of precipitation a year across roughly 118 days with measurable rain or snow; the nearest NOAA station does not record snowfall, so no snow figure is shown rather than guessed.
Mount Zion against the rest of the country
Out of 4876 cities scored here, Mount Zion comes in at 2263; within IL alone it ranks 26 of 330. Population is about 5,897.
Checking the actual forecast
These figures come from Decatur Ap, IL US, the NOAA station 3.6 miles from Mount Zion, averaged over 30 years, not tomorrow's forecast.
More on how this is worked out
Why some cities show no snow or rain figure · What a 30-year climate normal actually is