Diamond, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Diamond, a village in Grundy County, Illinois.
Overnight
65°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Cloudy. Low around 65, with temperatures rising to around 67 overnight. Southeast wind around 10 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Diamond
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 65°F | Chance Showers And Thunderstorms | 10 mph SE | 40% |
| Saturday | 82°F | Showers And Thunderstorms Likely | 5 mph ESE | 86% |
| Saturday Night | 66°F | Showers And Thunderstorms Likely | 5 mph SSW | 88% |
| Sunday | 73°F | Showers And Thunderstorms Likely | 5 to 15 mph NNE | 67% |
| Sunday Night | 57°F | Chance Showers And Thunderstorms | 10 to 15 mph NE | 45% |
| Monday | 67°F | Chance Rain Showers | 15 mph ENE | 54% |
| Monday Night | 53°F | Chance Rain Showers | 10 to 15 mph NE | 44% |
| Tuesday | 66°F | Slight Chance Rain Showers | 10 to 15 mph NE | 20% |
| Tuesday Night | 53°F | Mostly Cloudy | 5 to 10 mph NE | 13% |
| Wednesday | 68°F | Mostly Sunny | 5 to 10 mph NNE | 8% |
| Wednesday Night | 54°F | Mostly Cloudy | 5 mph NNE | 1% |
| Thursday | 70°F | Partly Sunny | 5 mph NNE | 3% |
| Thursday Night | 54°F | Mostly Cloudy | 0 to 5 mph NNE | 3% |
| Friday | 74°F | Mostly Sunny | 0 to 5 mph NE | 3% |
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 Sep 19, 2026.