Machesney Park, IL Weather & Growing Conditions
Today
84°F
Mostly Sunny
Mostly sunny, with a high near 84. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Mostly Sunny | 5 to 10 mph SSW | 7% |
| Tonight | 65°F | Chance Showers And Thunderstorms | 0 to 5 mph WSW | 74% |
| Wednesday | 77°F | Showers And Thunderstorms Likely | 0 to 5 mph W | 74% |
| Wednesday Night | 59°F | Showers And Thunderstorms Likely | 0 to 5 mph NNW | 66% |
| Thursday | 79°F | Chance Rain Showers then Partly Sunny | 0 to 5 mph NE | 32% |
| Thursday Night | 58°F | Mostly Clear | 0 to 5 mph NE | 12% |
| Friday | 82°F | Mostly Sunny | 0 to 5 mph S | 5% |
| Friday Night | 62°F | Mostly Clear | 0 to 5 mph SSW | 6% |
| Saturday | 84°F | Mostly Sunny | 0 to 10 mph SSW | 12% |
| Saturday Night | 67°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 to 10 mph SSW | 23% |
| Sunday | 86°F | Slight Chance Showers And Thunderstorms | 5 to 15 mph SW | 23% |
| Sunday Night | 67°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 to 10 mph SSW | 44% |
| Monday | 84°F | Chance Rain Showers | 5 to 10 mph SSW | 42% |
| Monday Night | 67°F | Chance Showers And Thunderstorms | 5 to 10 mph WNW | 44% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Machesney Park, IL
Last spring frost
May 1
First fall frost
Oct 12
Growing season
162 days
Hardiness zone
5b
Explore more for Machesney Park, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Beloit, Wi (9.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.