Diamond, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Diamond, a village in Grundy County, Illinois.
Today
84°F
Mostly Sunny
Mostly sunny, with a high near 84. South southwest wind 5 to 10 mph.
7-day forecast for Diamond
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Mostly Sunny | 5 to 10 mph SSW | 2% |
| Tonight | 67°F | Partly Cloudy | 5 mph S | 6% |
| Wednesday | 82°F | Chance Showers And Thunderstorms | 5 mph SW | 49% |
| Wednesday Night | 66°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 0 to 5 mph W | 88% |
| Thursday | 80°F | Showers And Thunderstorms Likely | 0 to 5 mph S | 80% |
| Thursday Night | 63°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph ENE | 43% |
| Friday | 83°F | Mostly Sunny | 0 mph | 5% |
| Friday Night | 65°F | Mostly Clear | 0 mph | 9% |
| Saturday | 85°F | Mostly Sunny | 0 to 5 mph SSW | 12% |
| Saturday Night | 70°F | Partly Cloudy | 0 to 5 mph SSW | 12% |
| Sunday | 88°F | Mostly Sunny | 5 to 10 mph SW | 12% |
| Sunday Night | 71°F | Slight Chance Showers And Thunderstorms | 5 mph SSW | 30% |
| Monday | 87°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 5 mph SSW | 30% |
| Monday Night | 71°F | Chance Showers And Thunderstorms | 5 mph WSW | 39% |
Forecast source: National Weather Service (api.weather.gov) for Diamond (41.285, -88.251). Updated through the day.
Growing snapshot for Diamond
Last spring frost
Apr 16
First fall frost
Oct 26
Growing season
191 days
Hardiness zone
5b
More local growing data for Diamond: nearby ZIP 60416 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Braceville
Carbon Hill
Coal City
East Brooklyn
Gardner
Godley
Kinsman
Mazon
Morris
South Wilmington
Verona
Climate data from the nearest NOAA station, Channahon Dresden Isl Dam, Il (7.2 mi from Diamond). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.