McCook, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for McCook, a village in Cook County, Illinois.
This Afternoon
72°F
Isolated Rain Showers
Isolated rain showers after 2pm. Mostly cloudy, with a high near 72. East northeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
7-day forecast for McCook
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 72°F | Isolated Rain Showers | 10 mph ENE | 22% |
| Tonight | 61°F | Isolated Rain Showers then Showers And Thunderstorms Likely | 10 mph E | 63% |
| Saturday | 74°F | Showers And Thunderstorms Likely then Showers And Thunderstorms | 5 to 10 mph SSE | 97% |
| Saturday Night | 63°F | Showers And Thunderstorms | 5 mph NE | 91% |
| Sunday | 69°F | Showers And Thunderstorms | 10 to 15 mph NE | 91% |
| Sunday Night | 56°F | Showers And Thunderstorms Likely | 15 mph ENE | 55% |
| Monday | 63°F | Showers And Thunderstorms Likely | 15 mph ENE | 61% |
| Monday Night | 54°F | Chance Rain Showers | 15 mph ENE | 50% |
| Tuesday | 62°F | Chance Rain Showers | 15 mph NE | 32% |
| Tuesday Night | 54°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 15 mph NE | 23% |
| Wednesday | 65°F | Partly Sunny | 5 to 10 mph NNE | 9% |
| Wednesday Night | 53°F | Mostly Cloudy | 5 to 10 mph N | 4% |
| Thursday | 67°F | Partly Sunny | 5 to 10 mph N | 6% |
| Thursday Night | 55°F | Mostly Cloudy | 5 mph N | 6% |
Forecast source: National Weather Service (api.weather.gov) for McCook (41.798, -87.842). Updated through the day.
Growing snapshot for McCook
Last spring frost
Apr 11
First fall frost
Oct 31
Growing season
201 days
Hardiness zone
6a
More local growing data for McCook: nearby ZIP 60534 weather · frost dates · planting calendar · Illinois frost dates
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Chicago
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Climate data from the nearest NOAA station, Chicago Midway Ap, Il (3.9 mi from McCook). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.