Newton, IL Weather & Growing Conditions
Tonight
71°F
Slight Chance Showers And Thunderstorms then Partly Cloudy
A slight chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 71. East southeast wind around 7 mph, with gusts as high as 16 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 71°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 7 mph ESE | 17% |
| Saturday | 94°F | Mostly Sunny | 5 to 9 mph SSW | 13% |
| Saturday Night | 71°F | Mostly Cloudy | 7 mph S | 9% |
| Sunday | 92°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 3 to 8 mph WNW | 22% |
| Sunday Night | 65°F | Chance Showers And Thunderstorms | 9 mph NNE | 41% |
| Monday | 80°F | Rain Showers Likely | 13 mph NE | 59% |
| Monday Night | 59°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 9 to 14 mph NNE | 59% |
| Tuesday | 73°F | Chance Showers And Thunderstorms then Partly Sunny | 13 mph NNE | 39% |
| Tuesday Night | 55°F | Mostly Cloudy | 7 to 13 mph NNE | 8% |
| Wednesday | 73°F | Partly Sunny | 10 mph NNE | 4% |
| Wednesday Night | 55°F | Partly Cloudy | 5 to 10 mph N | 4% |
| Thursday | 75°F | Mostly Sunny | 6 to 9 mph NNE | 4% |
| Thursday Night | 57°F | Partly Cloudy | 5 to 8 mph NNE | 4% |
| Friday | 76°F | Mostly Sunny | 6 to 9 mph NNE | 3% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Newton, IL
Last spring frost
Apr 13
First fall frost
Oct 22
Growing season
190 days
Hardiness zone
6b
Explore more for Newton, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Newton, Il (1.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.