Machesney Park, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Machesney Park, a village in Winnebago County, Illinois.
Today
76°F
Showers And Thunderstorms then Showers And Thunderstorms Likely
Showers and thunderstorms before noon, then showers and thunderstorms likely between noon and 2pm, then showers and thunderstorms. Some of the storms could produce heavy rain. Cloudy. High near 76, with temperatures falling to around 74 in the afternoon. Southeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
7-day forecast for Machesney Park
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 76°F | Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 to 10 mph SE | 100% |
| Tonight | 60°F | Showers And Thunderstorms | 5 to 10 mph E | 92% |
| Sunday | 68°F | Chance Showers And Thunderstorms | 10 to 15 mph NE | 51% |
| Sunday Night | 54°F | Slight Chance Rain Showers | 15 mph NE | 17% |
| Monday | 63°F | Chance Rain Showers | 15 mph ENE | 33% |
| Monday Night | 48°F | Slight Chance Rain Showers | 10 to 15 mph NE | 17% |
| Tuesday | 62°F | Slight Chance Rain Showers then Partly Sunny | 10 to 15 mph NE | 15% |
| Tuesday Night | 47°F | Partly Cloudy | 5 to 15 mph NE | 9% |
| Wednesday | 65°F | Mostly Sunny | 5 to 15 mph NE | 3% |
| Wednesday Night | 49°F | Partly Cloudy | 5 to 10 mph NE | 1% |
| Thursday | 66°F | Mostly Sunny | 5 to 10 mph NE | 4% |
| Thursday Night | 49°F | Mostly Cloudy | 0 to 5 mph NE | 4% |
| Friday | 70°F | Mostly Sunny | 0 to 10 mph NE | 3% |
| Friday Night | 50°F | Partly Cloudy | 0 to 5 mph ENE | 3% |
Forecast source: National Weather Service (api.weather.gov) for Machesney Park (42.368, -89.025). Updated through the day.
Growing snapshot for Machesney Park
Last spring frost
May 1
First fall frost
Oct 12
Growing season
162 days
Hardiness zone
5b
More local growing data for Machesney Park: nearby ZIP 61115 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Cherry Valley
Durand
Loves Park
New Milford
Pecatonica
Rockford
Rockton
Roscoe
South Beloit
Westlake Village
Winnebago
Climate data from the nearest NOAA station, Beloit, Wi (9.8 mi from Machesney Park). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.