Merritt, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Merritt, a community in Morgan County, Illinois.
Tonight
71°F
Partly Cloudy
Partly cloudy, with a low around 71. Southeast wind around 7 mph, with gusts as high as 16 mph.
7-day forecast for Merritt
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 71°F | Partly Cloudy | 7 mph SE | 11% |
| Saturday | 93°F | Partly Sunny | 6 to 9 mph SW | 7% |
| Saturday Night | 69°F | Mostly Cloudy then Chance Showers And Thunderstorms | 7 mph SSW | 32% |
| Sunday | 85°F | Rain Showers Likely | 2 to 8 mph NW | 70% |
| Sunday Night | 61°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 7 to 10 mph NE | 70% |
| Monday | 71°F | Showers And Thunderstorms Likely | 8 to 12 mph NE | 70% |
| Monday Night | 56°F | Chance Showers And Thunderstorms | 8 to 12 mph NNE | 44% |
| Tuesday | 67°F | Chance Rain Showers then Mostly Cloudy | 12 mph NNE | 32% |
| Tuesday Night | 51°F | Mostly Cloudy | 5 to 9 mph NNE | 4% |
| Wednesday | 71°F | Mostly Sunny | 8 mph NNE | 0% |
| Wednesday Night | 53°F | Partly Cloudy | 2 to 6 mph NNE | 0% |
| Thursday | 73°F | Mostly Sunny | 2 to 6 mph NNE | 4% |
| Thursday Night | 55°F | Partly Cloudy | 5 mph NNE | 4% |
| Friday | 74°F | Mostly Sunny | 2 to 6 mph NE | 4% |
Forecast source: National Weather Service (api.weather.gov) for Merritt (39.715, -90.416). Updated through the day.
Growing snapshot for Merritt
Last spring frost
Apr 17
First fall frost
Oct 21
Growing season
186 days
Hardiness zone
6a
More local growing data for Merritt: nearby ZIP 62628 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Alexander
Chapin
Concord
Franklin
Jacksonville
Lynnville
Meredosia
Murrayville
Riggston
South Jacksonville
Waverly
Woodson
Climate data from the nearest NOAA station, Jacksonville 2, Il (10.3 mi from Merritt). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.