Martinsville, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Martinsville, a city in Clark County, Illinois.
Today
92°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 11am. Mostly sunny, with a high near 92. Southwest wind around 8 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Martinsville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 92°F | Chance Showers And Thunderstorms | 8 mph SW | 43% |
| Tonight | 70°F | Mostly Cloudy | 6 mph SSE | 9% |
| Sunday | 89°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 to 10 mph NNW | 32% |
| Sunday Night | 62°F | Chance Showers And Thunderstorms | 13 mph NE | 60% |
| Monday | 73°F | Showers And Thunderstorms Likely | 14 mph NE | 68% |
| Monday Night | 56°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 12 to 16 mph NE | 54% |
| Tuesday | 70°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 15 mph NNE | 25% |
| Tuesday Night | 54°F | Chance Showers And Thunderstorms then Mostly Cloudy | 8 to 15 mph NNE | 25% |
| Wednesday | 71°F | Mostly Sunny | 12 mph N | 7% |
| Wednesday Night | 54°F | Partly Cloudy | 6 to 12 mph N | 4% |
| Thursday | 73°F | Mostly Sunny | 10 mph N | 2% |
| Thursday Night | 55°F | Partly Cloudy | 5 to 9 mph NNE | 4% |
| Friday | 75°F | Mostly Sunny | 7 to 10 mph NNE | 2% |
| Friday Night | 54°F | Partly Cloudy | 6 to 9 mph NE | 2% |
Forecast source: National Weather Service (api.weather.gov) for Martinsville (39.338, -87.881). Updated through the day.
Growing snapshot for Martinsville
Last spring frost
Apr 14
First fall frost
Oct 20
Growing season
187 days
Hardiness zone
6b
More local growing data for Martinsville: nearby ZIP 62442 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Casey, Il (6.5 mi from Martinsville). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.