Merritt, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Merritt, a community in Morgan County, Illinois.
Overnight
54°F
Slight Chance Light Rain
A slight chance of rain before 2am. Mostly cloudy, with a low around 54. Southwest wind around 12 mph, with gusts as high as 21 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Merritt
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 54°F | Slight Chance Light Rain | 12 mph SW | 15% |
| Wednesday | 60°F | Patchy Drizzle | 12 to 15 mph WSW | 10% |
| Wednesday Night | 46°F | Patchy Drizzle then Mostly Cloudy | 10 mph WSW | 10% |
| Thursday | 60°F | Partly Sunny | 10 to 14 mph W | 6% |
| Thursday Night | 43°F | Mostly Cloudy | 5 to 8 mph NW | 7% |
| Friday | 54°F | Partly Sunny | 7 to 10 mph NNW | 2% |
| Friday Night | 32°F | Partly Cloudy | 0 to 6 mph N | 0% |
| Saturday | 54°F | Mostly Sunny | 0 to 3 mph NNW | 0% |
| Saturday Night | 32°F | Partly Cloudy | 1 mph WNW | 1% |
| Sunday | 59°F | Sunny | 1 to 6 mph W | 2% |
| Sunday Night | 34°F | Clear | 2 mph WSW | 0% |
| Monday | 64°F | Sunny | 1 to 7 mph SW | 0% |
| Monday Night | 39°F | Mostly Clear | 3 mph SW | 0% |
| Tuesday | 66°F | Sunny | 5 mph WNW | 1% |
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 Nov 4, 2026.