Plum Valley, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Plum Valley, a community in Lake County, Illinois.
This Afternoon
74°F
Chance Rain
A chance of rain. Partly sunny. High near 74, with temperatures falling to around 70 in the afternoon. South wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 30%.
7-day forecast for Plum Valley
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 74°F | Chance Rain | 15 to 20 mph S | 25% |
| Tonight | 61°F | Rain Likely | 15 to 20 mph S | 74% |
| Wednesday | 65°F | Rain Likely then Mostly Cloudy | 15 mph SSW | 60% |
| Wednesday Night | 48°F | Mostly Cloudy | 15 mph SW | 7% |
| Thursday | 58°F | Mostly Cloudy | 10 to 15 mph SW | 12% |
| Thursday Night | 43°F | Chance Rain | 5 to 10 mph WNW | 42% |
| Friday | 54°F | Chance Rain | 10 mph N | 36% |
| Friday Night | 37°F | Slight Chance Rain then Mostly Cloudy | 5 to 10 mph NNW | 17% |
| Saturday | 52°F | Mostly Sunny | 5 mph WNW | 12% |
| Saturday Night | 34°F | Partly Cloudy | 0 to 5 mph WSW | 6% |
| Sunday | 56°F | Mostly Sunny | 5 to 10 mph W | 13% |
| Sunday Night | 35°F | Mostly Clear | 5 mph W | 11% |
| Monday | 60°F | Sunny | 5 to 10 mph WSW | 8% |
| Monday Night | 40°F | Partly Cloudy | 5 to 10 mph WSW | 2% |
Forecast source: National Weather Service (api.weather.gov) for Plum Valley (41.461, -87.544). Updated through the day.
Growing snapshot for Plum Valley
Last spring frost
Apr 23
First fall frost
Oct 20
Growing season
179 days
Hardiness zone
6a
More local growing data for Plum Valley: nearby ZIP 46311 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Park Forest, Il (9 mi from Plum Valley). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.