Saybrook, IL Weather & Growing Conditions
This Afternoon
71°F
Chance Light Rain
A chance of rain. Partly sunny, with a high near 71. South wind around 20 mph, with gusts as high as 30 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 71°F | Chance Light Rain | 20 mph S | 40% |
| Tonight | 54°F | Light Rain | 15 to 20 mph S | 93% |
| Wednesday | 62°F | Chance Light Rain then Mostly Cloudy | 14 to 17 mph SSW | 31% |
| Wednesday Night | 45°F | Mostly Cloudy | 13 mph SW | 5% |
| Thursday | 60°F | Partly Sunny | 12 to 17 mph WSW | 6% |
| Thursday Night | 42°F | Mostly Cloudy then Slight Chance Light Rain | 6 to 9 mph WNW | 23% |
| Friday | 55°F | Slight Chance Light Rain then Partly Sunny | 7 to 12 mph NNW | 19% |
| Friday Night | 35°F | Mostly Cloudy | 5 to 10 mph NNW | 5% |
| Saturday | 53°F | Mostly Sunny | 6 mph NW | 3% |
| Saturday Night | 32°F | Partly Cloudy | 5 mph W | 4% |
| Sunday | 59°F | Sunny | 5 to 10 mph W | 11% |
| Sunday Night | 33°F | Mostly Clear | 5 to 8 mph WNW | 8% |
| Monday | 63°F | Sunny | 5 to 13 mph WSW | 3% |
| Monday Night | 38°F | Mostly Clear | 9 mph WSW | 2% |
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 Nov 4, 2026.