Cullom, IL Weather & Growing Conditions
Overnight
58°F
Rain Showers
Rain showers. Cloudy. Low around 58, with temperatures rising to around 62 overnight. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 58°F | Rain Showers | 15 mph S | 85% |
| Wednesday | 64°F | Slight Chance Rain Showers then Mostly Cloudy | 10 to 15 mph SW | 23% |
| Wednesday Night | 45°F | Mostly Cloudy | 10 to 15 mph SW | 6% |
| Thursday | 60°F | Mostly Cloudy then Slight Chance Rain Showers | 10 to 15 mph WSW | 21% |
| Thursday Night | 40°F | Chance Rain Showers | 5 to 10 mph NW | 45% |
| Friday | 51°F | Partly Sunny | 10 mph NNW | 10% |
| Friday Night | 31°F | Partly Cloudy | 5 to 10 mph NNW | 0% |
| Saturday | 54°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 31°F | Partly Cloudy | 0 mph | 1% |
| Sunday | 58°F | Sunny | 0 to 10 mph W | 2% |
| Sunday Night | 32°F | Clear | 0 to 5 mph W | 0% |
| Monday | 64°F | Sunny | 0 to 5 mph SW | 0% |
| Monday Night | 37°F | Mostly Clear | 5 mph WSW | 1% |
| Tuesday | 65°F | Sunny | 0 to 5 mph WNW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Cullom, IL
Last spring frost
Apr 25
First fall frost
Oct 20
Growing season
175 days
Hardiness zone
5b
Explore more for Cullom, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Piper City, Il (10 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.