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Mechanicsburg, IL Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Mechanicsburg, a village in Sangamon County, Illinois.

Today
91°F
Mostly Cloudy
Mostly cloudy, with a high near 91. South southwest wind around 7 mph.

7-day forecast for Mechanicsburg

WhenTempForecastWindPrecip
Today 91°F Mostly Cloudy 7 mph SSW 10%
Tonight 70°F Partly Cloudy then Slight Chance Showers And Thunderstorms 5 mph SSW 21%
Sunday 84°F Chance Showers And Thunderstorms 3 to 10 mph N 45%
Sunday Night 61°F Chance Showers And Thunderstorms 9 to 13 mph NE 67%
Monday 71°F Showers And Thunderstorms Likely 14 mph NE 71%
Monday Night 55°F Chance Rain Showers 9 to 13 mph NE 50%
Tuesday 68°F Slight Chance Rain Showers 14 mph NE 21%
Tuesday Night 52°F Slight Chance Rain Showers then Mostly Cloudy 6 to 13 mph NNE 16%
Wednesday 71°F Mostly Sunny 10 mph NNE 2%
Wednesday Night 54°F Partly Cloudy 5 to 9 mph NNE 2%
Thursday 73°F Mostly Sunny 5 to 9 mph NNE 2%
Thursday Night 55°F Partly Cloudy 3 to 8 mph NNE 2%
Friday 75°F Mostly Sunny 5 to 9 mph NE 2%
Friday Night 55°F Partly Cloudy 3 to 8 mph NE 2%

Forecast source: National Weather Service (api.weather.gov) for Mechanicsburg (39.797, -89.411). Updated through the day.

Growing snapshot for Mechanicsburg

Last spring frost
Apr 15
First fall frost
Oct 22
Growing season
188 days
Hardiness zone
6a

More local growing data for Mechanicsburg: nearby ZIP 62545 weather · frost dates · planting calendar · Illinois frost dates

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Climate data from the nearest NOAA station, Springfield #2, Il (15.6 mi from Mechanicsburg). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.