Hartsburg, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hartsburg, a village in Logan County, Illinois.
This Afternoon
84°F
Mostly Sunny
Mostly sunny. High near 84, with temperatures falling to around 77 in the afternoon. East wind around 9 mph.
7-day forecast for Hartsburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 84°F | Mostly Sunny | 9 mph E | 8% |
| Tonight | 70°F | Partly Cloudy | 9 mph ESE | 4% |
| Saturday | 90°F | Slight Chance Rain Showers then Mostly Cloudy | 8 mph SSW | 18% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms | 7 mph SSE | 36% |
| Sunday | 81°F | Showers And Thunderstorms Likely | 3 to 13 mph N | 61% |
| Sunday Night | 60°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 63% |
| Monday | 69°F | Showers And Thunderstorms Likely | 14 mph ENE | 63% |
| Monday Night | 55°F | Chance Showers And Thunderstorms | 10 to 16 mph NE | 48% |
| Tuesday | 66°F | Slight Chance Rain Showers | 13 mph NE | 24% |
| Tuesday Night | 52°F | Mostly Cloudy | 6 to 13 mph NNE | 5% |
| Wednesday | 70°F | Partly Sunny | 9 mph NNE | 4% |
| Wednesday Night | 53°F | Partly Cloudy | 3 to 9 mph NNE | 1% |
| Thursday | 71°F | Mostly Sunny | 5 to 8 mph NNE | 3% |
| Thursday Night | 55°F | Partly Cloudy | 3 to 7 mph NNE | 4% |
Forecast source: National Weather Service (api.weather.gov) for Hartsburg (40.251, -89.441). Updated through the day.
Growing snapshot for Hartsburg
Last spring frost
Apr 20
First fall frost
Oct 16
Growing season
179 days
Hardiness zone
6a
More local growing data for Hartsburg: nearby ZIP 62643 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Atlanta
Beason
Broadwell
Chestnut
Cornland
Elkhart
Emden
Latham
Lincoln
Middletown
Mount Pulaski
New Holland
Climate data from the nearest NOAA station, Lincoln, Il (8.8 mi from Hartsburg). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.