Buffalo Grove, IL Weather & Growing Conditions
Today
85°F
Mostly Sunny
Mostly sunny, with a high near 85. South southwest wind 5 to 10 mph, with gusts as high as 20 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Mostly Sunny | 5 to 10 mph SSW | 0% |
| Tonight | 68°F | Mostly Cloudy then Chance Showers And Thunderstorms | 5 mph SW | 41% |
| Wednesday | 79°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 mph WSW | 74% |
| Wednesday Night | 63°F | Showers And Thunderstorms | 0 to 5 mph NW | 85% |
| Thursday | 78°F | Rain Showers Likely then Slight Chance Showers And Thunderstorms | 0 to 5 mph NNE | 58% |
| Thursday Night | 61°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph SSW | 17% |
| Friday | 82°F | Mostly Sunny | 0 to 5 mph S | 3% |
| Friday Night | 64°F | Mostly Clear | 0 to 5 mph SSE | 7% |
| Saturday | 85°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 15% |
| Saturday Night | 69°F | Slight Chance Showers And Thunderstorms | 5 mph SW | 21% |
| Sunday | 86°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 21% |
| Sunday Night | 68°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 46% |
| Monday | 85°F | Chance Showers And Thunderstorms | 5 to 10 mph SSW | 46% |
| Monday Night | 69°F | Chance Showers And Thunderstorms | 5 to 10 mph W | 48% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Buffalo Grove, IL
Last spring frost
Apr 19
First fall frost
Oct 26
Growing season
190 days
Hardiness zone
6a
Explore more for Buffalo Grove, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Chicago Palwaukee Ap, Il (4.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.