Mechanicsburg, IL Weather & Growing Conditions
Overnight
54°F
Rain Likely
Rain likely before 5am. Cloudy, with a low around 54. South southwest wind around 14 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 54°F | Rain Likely | 14 mph SSW | 59% |
| Wednesday | 60°F | Mostly Cloudy | 12 to 16 mph SW | 12% |
| Wednesday Night | 44°F | Mostly Cloudy | 9 mph SW | 1% |
| Thursday | 61°F | Mostly Sunny | 8 to 14 mph WSW | 4% |
| Thursday Night | 42°F | Mostly Cloudy then Slight Chance Light Rain | 3 to 7 mph NW | 22% |
| Friday | 56°F | Mostly Cloudy | 6 to 10 mph NNW | 12% |
| Friday Night | 36°F | Mostly Cloudy | 2 to 9 mph NNW | 5% |
| Saturday | 54°F | Mostly Sunny | 5 mph NW | 1% |
| Saturday Night | 34°F | Partly Cloudy | 2 mph W | 2% |
| Sunday | 60°F | Sunny | 2 to 8 mph W | 7% |
| Sunday Night | 34°F | Mostly Clear | 2 to 6 mph WNW | 4% |
| Monday | 64°F | Sunny | 3 to 10 mph SW | 3% |
| Monday Night | 39°F | Mostly Clear | 3 to 7 mph WSW | 2% |
| Tuesday | 66°F | Sunny | 3 to 7 mph WNW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Mechanicsburg, IL
Last spring frost
Apr 15
First fall frost
Oct 22
Growing season
188 days
Hardiness zone
6a
Explore more for Mechanicsburg, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Springfield #2, Il (15.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.