Franklin, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Franklin, a village in Morgan County, Illinois.
Tonight
51°F
Light Rain
Rain and a slight chance of thunderstorms before 5am, then a chance of rain showers. Cloudy, with a low around 51. South southwest wind 10 to 20 mph, with gusts as high as 29 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Franklin
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 51°F | Light Rain | 10 to 20 mph SSW | 83% |
| Wednesday | 59°F | Chance Rain Showers then Mostly Cloudy | 12 to 15 mph WSW | 10% |
| Wednesday Night | 41°F | Mostly Cloudy | 9 mph SW | 1% |
| Thursday | 61°F | Mostly Sunny | 8 to 13 mph W | 5% |
| Thursday Night | 41°F | Mostly Cloudy then Slight Chance Light Rain | 3 to 7 mph NW | 21% |
| Friday | 56°F | Mostly Cloudy | 6 to 9 mph NNW | 11% |
| Friday Night | 35°F | Mostly Cloudy | 1 to 8 mph NNW | 2% |
| Saturday | 54°F | Mostly Sunny | 3 mph NW | 1% |
| Saturday Night | 33°F | Partly Cloudy | 2 mph W | 1% |
| Sunday | 60°F | Sunny | 2 to 7 mph W | 7% |
| Sunday Night | 34°F | Mostly Clear | 5 mph W | 4% |
| Monday | 64°F | Sunny | 3 to 9 mph SW | 2% |
| Monday Night | 38°F | Mostly Clear | 6 mph SW | 1% |
| Tuesday | 67°F | Sunny | 6 mph WNW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Franklin (39.621, -90.048). Updated through the day.
Growing snapshot for Franklin
Last spring frost
Apr 17
First fall frost
Oct 21
Growing season
186 days
Hardiness zone
6a
More local growing data for Franklin: nearby ZIP 62638 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Alexander
Chapin
Concord
Jacksonville
Lynnville
Meredosia
Merritt
Murrayville
Riggston
South Jacksonville
Waverly
Woodson
Climate data from the nearest NOAA station, Jacksonville 2, Il (10.6 mi from Franklin). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.