Trout Valley, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Trout Valley, a village in Mchenry County, Illinois.
Today
76°F
Showers And Thunderstorms
Showers and thunderstorms before 1pm, then a chance of showers and thunderstorms between 1pm and 3pm, then showers and thunderstorms likely. Cloudy. High near 76, with temperatures falling to around 74 in the afternoon. South southeast wind 5 to 10 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
7-day forecast for Trout Valley
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 76°F | Showers And Thunderstorms | 5 to 10 mph SSE | 100% |
| Tonight | 61°F | Showers And Thunderstorms | 5 to 10 mph ENE | 94% |
| Sunday | 68°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 56% |
| Sunday Night | 54°F | Slight Chance Rain Showers | 15 mph NE | 18% |
| Monday | 63°F | Chance Rain Showers | 15 mph ENE | 26% |
| Monday Night | 50°F | Slight Chance Rain Showers then Mostly Cloudy | 10 to 15 mph ENE | 17% |
| Tuesday | 61°F | Mostly Cloudy | 10 to 15 mph NE | 13% |
| Tuesday Night | 50°F | Mostly Cloudy | 5 to 10 mph NE | 6% |
| Wednesday | 63°F | Partly Sunny | 5 to 10 mph NE | 11% |
| Wednesday Night | 51°F | Mostly Cloudy | 0 to 5 mph NNE | 4% |
| Thursday | 66°F | Partly Sunny | 5 mph NNE | 5% |
| Thursday Night | 51°F | Mostly Cloudy | 0 to 5 mph NNE | 4% |
| Friday | 69°F | Mostly Sunny | 0 to 5 mph NE | 5% |
| Friday Night | 51°F | Partly Cloudy | 0 to 5 mph NE | 3% |
Forecast source: National Weather Service (api.weather.gov) for Trout Valley (42.196, -88.251). Updated through the day.
Growing snapshot for Trout Valley
Last spring frost
May 1
First fall frost
Oct 11
Growing season
162 days
Hardiness zone
5b
More local growing data for Trout Valley: nearby ZIP 60013 weather · frost dates · planting calendar · Illinois frost dates
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Climate data from the nearest NOAA station, Mc Henry -Wg Stratton L&D, Il (6 mi from Trout Valley). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.