Montgomery, IL Weather & Growing Conditions
Overnight
64°F
Showers And Thunderstorms Likely
Showers and thunderstorms likely. Some of the storms could produce heavy rain. Cloudy. Low around 64, with temperatures rising to around 66 overnight. East southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 64°F | Showers And Thunderstorms Likely | 10 mph ESE | 73% |
| Saturday | 79°F | Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 to 10 mph ESE | 100% |
| Saturday Night | 65°F | Showers And Thunderstorms | 5 to 10 mph E | 96% |
| Sunday | 71°F | Showers And Thunderstorms Likely | 10 to 15 mph NNE | 62% |
| Sunday Night | 57°F | Chance Rain Showers | 15 mph NE | 35% |
| Monday | 65°F | Chance Rain Showers | 15 mph ENE | 36% |
| Monday Night | 52°F | Chance Rain Showers then Mostly Cloudy | 10 to 15 mph NE | 26% |
| Tuesday | 64°F | Slight Chance Rain Showers | 10 to 15 mph NE | 19% |
| Tuesday Night | 52°F | Mostly Cloudy | 10 to 15 mph NE | 8% |
| Wednesday | 66°F | Partly Sunny | 10 to 15 mph NNE | 7% |
| Wednesday Night | 53°F | Mostly Cloudy | 5 to 10 mph NNE | 2% |
| Thursday | 68°F | Partly Sunny | 5 to 10 mph NNE | 2% |
| Thursday Night | 53°F | Partly Cloudy | 5 to 10 mph NNE | 2% |
| Friday | 72°F | Mostly Sunny | 5 to 10 mph NE | 3% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Montgomery, IL
Last spring frost
Apr 19
First fall frost
Oct 23
Growing season
185 days
Hardiness zone
5b
Explore more for Montgomery, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Aurora, Il (3.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.