Mark, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mark, a village in Putnam County, Illinois.
Overnight
67°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 67. Southeast wind around 10 mph. Chance of precipitation is 30%.
7-day forecast for Mark
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 67°F | Chance Showers And Thunderstorms | 10 mph SE | 30% |
| Saturday | 82°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 to 10 mph S | 55% |
| Saturday Night | 66°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 mph N | 77% |
| Sunday | 73°F | Rain Showers | 5 to 15 mph NE | 78% |
| Sunday Night | 58°F | Showers And Thunderstorms | 15 mph NE | 78% |
| Monday | 66°F | Showers And Thunderstorms Likely | 15 mph NE | 63% |
| Monday Night | 53°F | Chance Rain Showers | 15 mph NE | 42% |
| Tuesday | 64°F | Chance Rain Showers | 10 to 15 mph NE | 31% |
| Tuesday Night | 51°F | Mostly Cloudy | 5 to 15 mph NE | 6% |
| Wednesday | 68°F | Partly Sunny | 5 to 10 mph NE | 5% |
| Wednesday Night | 53°F | Partly Cloudy | 5 to 10 mph NE | 5% |
| Thursday | 70°F | Mostly Sunny | 5 mph N | 3% |
| Thursday Night | 54°F | Partly Cloudy | 0 to 5 mph NE | 4% |
| Friday | 72°F | Mostly Sunny | 5 mph NE | 4% |
Forecast source: National Weather Service (api.weather.gov) for Mark (41.262, -89.255). Updated through the day.
Growing snapshot for Mark
Last spring frost
Apr 24
First fall frost
Oct 17
Growing season
174 days
Hardiness zone
5b
More local growing data for Mark: nearby ZIP 61340 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Hennepin Wtr Trmt Plt, Il (4.5 mi from Mark). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.