Machesney Park, IL Weather & Growing Conditions
This Afternoon
61°F
Slight Chance Rain Showers
A slight chance of rain showers and a slight chance of drizzle. Cloudy. High near 61, with temperatures falling to around 54 in the afternoon. Southwest wind around 15 mph, with gusts as high as 25 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 61°F | Slight Chance Rain Showers | 15 mph SW | 10% |
| Tonight | 44°F | Slight Chance Rain Showers then Cloudy | 15 mph SW | 13% |
| Thursday | 54°F | Rain Likely | 10 to 15 mph W | 58% |
| Thursday Night | 36°F | Mostly Cloudy | 10 mph N | 9% |
| Friday | 48°F | Mostly Sunny | 10 to 15 mph N | 0% |
| Friday Night | 28°F | Mostly Clear | 0 to 5 mph NNW | 0% |
| Saturday | 51°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 30°F | Mostly Clear | 0 to 5 mph W | 0% |
| Sunday | 58°F | Sunny | 5 to 10 mph W | 1% |
| Sunday Night | 32°F | Mostly Clear | 0 to 5 mph WSW | 0% |
| Monday | 61°F | Sunny | 0 to 10 mph SW | 0% |
| Monday Night | 38°F | Clear | 5 to 10 mph WSW | 0% |
| Tuesday | 61°F | Sunny | 0 to 5 mph WNW | 1% |
| Tuesday Night | 36°F | Partly Cloudy | 0 to 5 mph NW | 1% |
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 Nov 4, 2026.