Mark, IL Weather & Growing Conditions
This Afternoon
71°F
Showers And Thunderstorms
Showers and thunderstorms. Mostly cloudy, with a high near 71. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 90%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 71°F | Showers And Thunderstorms | 15 mph S | 90% |
| Tonight | 55°F | Showers And Thunderstorms | 15 mph S | 90% |
| Wednesday | 58°F | Chance Rain Showers then Mostly Cloudy | 15 mph SW | 28% |
| Wednesday Night | 47°F | Mostly Cloudy | 10 to 15 mph SW | 10% |
| Thursday | 55°F | Mostly Cloudy then Chance Rain Showers | 10 to 15 mph SW | 26% |
| Thursday Night | 44°F | Chance Rain Showers | 5 to 10 mph NW | 34% |
| Friday | 52°F | Slight Chance Rain Showers | 10 mph N | 18% |
| Friday Night | 36°F | Partly Cloudy | 0 to 5 mph NW | 2% |
| Saturday | 51°F | Mostly Sunny | 0 to 5 mph W | 3% |
| Saturday Night | 36°F | Partly Cloudy | 0 to 5 mph W | 3% |
| Sunday | 57°F | Sunny | 5 to 10 mph W | 14% |
| Sunday Night | 36°F | Mostly Clear | 5 mph W | 4% |
| Monday | 62°F | Sunny | 5 to 10 mph SW | 2% |
| Monday Night | 41°F | Mostly Clear | 5 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Mark, IL
Last spring frost
Apr 24
First fall frost
Oct 17
Growing season
174 days
Hardiness zone
5b
Explore more for Mark, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Hennepin Wtr Trmt Plt, Il (4.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.