Saybrook, IL Weather & Growing Conditions
Today
83°F
Patchy Fog then Sunny
Patchy fog before 9am. Sunny, with a high near 83. South wind around 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Patchy Fog then Sunny | 6 mph S | 0% |
| Tonight | 66°F | Partly Cloudy | 6 mph SSE | 1% |
| Wednesday | 83°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 8 mph SSW | 21% |
| Wednesday Night | 66°F | Showers And Thunderstorms | 6 mph S | 81% |
| Thursday | 80°F | Showers And Thunderstorms | 6 mph SSW | 81% |
| Thursday Night | 64°F | Slight Chance Showers And Thunderstorms | 5 mph S | 23% |
| Friday | 81°F | Mostly Sunny | 3 mph S | 11% |
| Friday Night | 65°F | Slight Chance Showers And Thunderstorms | 3 mph S | 24% |
| Saturday | 83°F | Mostly Sunny | 7 mph SSW | 14% |
| Saturday Night | 69°F | Mostly Clear | 5 to 9 mph SSW | 13% |
| Sunday | 86°F | Sunny | 9 to 13 mph SSW | 9% |
| Sunday Night | 70°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 12 mph SSW | 15% |
| Monday | 86°F | Slight Chance Showers And Thunderstorms | 12 mph SSW | 18% |
| Monday Night | 70°F | Slight Chance Showers And Thunderstorms | 10 mph SW | 30% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Saybrook, IL
Last spring frost
Apr 21
First fall frost
Oct 17
Growing season
178 days
Hardiness zone
6a
Explore more for Saybrook, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Gibson City, Il (8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.