Bismarck, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Bismarck, a village in Vermilion County, Illinois.
Today
65°F
Chance Light Rain then Slight Chance Drizzle
A chance of rain before 8am, then a slight chance of drizzle. Mostly cloudy. High near 65, with temperatures falling to around 59 in the afternoon. South southwest wind around 14 mph, with gusts as high as 25 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Bismarck
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 65°F | Chance Light Rain then Slight Chance Drizzle | 14 mph SSW | 40% |
| Tonight | 46°F | Slight Chance Drizzle then Mostly Cloudy | 10 mph SW | 10% |
| Thursday | 61°F | Mostly Cloudy then Slight Chance Light Rain | 10 to 15 mph WSW | 16% |
| Thursday Night | 43°F | Chance Light Rain | 5 mph WNW | 27% |
| Friday | 54°F | Slight Chance Light Rain then Mostly Cloudy | 6 to 9 mph NNW | 16% |
| Friday Night | 35°F | Partly Cloudy | 3 to 7 mph NNW | 0% |
| Saturday | 53°F | Sunny | 5 mph NW | 0% |
| Saturday Night | 32°F | Mostly Clear | 1 mph WNW | 1% |
| Sunday | 59°F | Sunny | 1 to 7 mph W | 2% |
| Sunday Night | 33°F | Clear | 3 mph W | 0% |
| Monday | 63°F | Sunny | 1 to 6 mph SW | 0% |
| Monday Night | 38°F | Mostly Clear | 3 mph SW | 1% |
| Tuesday | 66°F | Sunny | 5 mph W | 1% |
| Tuesday Night | 38°F | Mostly Clear | 1 mph NNW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Bismarck (40.259, -87.611). Updated through the day.
Growing snapshot for Bismarck
Last spring frost
Apr 21
First fall frost
Oct 20
Growing season
181 days
Hardiness zone
6a
More local growing data for Bismarck: nearby ZIP 61811 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Allerton
Alvan (Alvin)
Belgium
Catlin
Danville
East Lynn
Fairmount
Fithian
Georgetown
Henning
Hoopeston
Indianola
Muncie
Oakwood
Olivet
Potomac
Rankin
Ridge Farm
Rossville
Sidell
Tilton
Westville
Climate data from the nearest NOAA station, Danville, Il (10.9 mi from Bismarck). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.