Manhattan, IL Weather & Growing Conditions
This Afternoon
74°F
Chance Rain Showers
A chance of rain showers. Partly sunny, with a high near 74. East wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 50%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 74°F | Chance Rain Showers | 10 mph E | 50% |
| Tonight | 63°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 10 mph ESE | 37% |
| Saturday | 80°F | Showers And Thunderstorms Likely | 5 to 10 mph SE | 76% |
| Saturday Night | 67°F | Showers And Thunderstorms Likely | 5 mph S | 80% |
| Sunday | 71°F | Showers And Thunderstorms | 5 to 15 mph NNE | 80% |
| Sunday Night | 56°F | Showers And Thunderstorms Likely | 15 mph NE | 71% |
| Monday | 66°F | Showers And Thunderstorms Likely | 15 mph ENE | 59% |
| Monday Night | 52°F | Chance Rain Showers | 10 to 15 mph NE | 34% |
| Tuesday | 64°F | Chance Rain Showers | 10 to 15 mph NE | 25% |
| Tuesday Night | 52°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NE | 16% |
| Wednesday | 67°F | Partly Sunny | 5 to 10 mph NNE | 6% |
| Wednesday Night | 52°F | Mostly Cloudy | 5 to 10 mph NNE | 6% |
| Thursday | 69°F | Partly Sunny | 5 to 10 mph NNE | 5% |
| Thursday Night | 54°F | Mostly Cloudy | 5 mph NNE | 3% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Manhattan, IL
Last spring frost
Apr 19
First fall frost
Oct 25
Growing season
188 days
Hardiness zone
6a
Explore more for Manhattan, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Joliet Brandon Rd Dam, Il (10.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.