Lake City, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lake City, a community in Piatt County, Illinois.
Overnight
69°F
Partly Cloudy
Partly cloudy, with a low around 69. South southeast wind around 7 mph.
7-day forecast for Lake City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 69°F | Partly Cloudy | 7 mph SSE | 12% |
| Saturday | 91°F | Slight Chance Showers And Thunderstorms | 8 mph SSW | 19% |
| Saturday Night | 69°F | Mostly Cloudy then Slight Chance Showers And Thunderstorms | 6 mph SSW | 15% |
| Sunday | 84°F | Chance Showers And Thunderstorms | 3 to 10 mph NNW | 45% |
| Sunday Night | 59°F | Chance Showers And Thunderstorms | 14 mph NE | 61% |
| Monday | 70°F | Showers And Thunderstorms Likely | 15 mph NE | 70% |
| Monday Night | 53°F | Chance Showers And Thunderstorms | 12 to 15 mph NE | 46% |
| Tuesday | 67°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 15 mph NE | 23% |
| Tuesday Night | 51°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 8 to 14 mph NNE | 23% |
| Wednesday | 70°F | Mostly Sunny | 12 mph NNE | 4% |
| Wednesday Night | 52°F | Partly Cloudy | 6 to 10 mph NNE | 3% |
| Thursday | 71°F | Mostly Sunny | 7 to 10 mph NNE | 2% |
| Thursday Night | 54°F | Partly Cloudy | 5 to 9 mph NNE | 2% |
| Friday | 74°F | Mostly Sunny | 6 to 10 mph NE | 1% |
Forecast source: National Weather Service (api.weather.gov) for Lake City (39.754, -88.719). Updated through the day.
Growing snapshot for Lake City
Last spring frost
Apr 16
First fall frost
Oct 22
Growing season
187 days
Hardiness zone
6a
More local growing data for Lake City: nearby ZIP 61936 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Decatur Ap, Il (7.7 mi from Lake City). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.