Cairo, IL Weather & Growing Conditions
Overnight
72°F
Mostly Clear
Mostly clear, with a low around 72. Wind around 0 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 72°F | Mostly Clear | 0 mph | 1% |
| Saturday | 99°F | Sunny | 1 to 6 mph SW | 1% |
| Saturday Night | 72°F | Mostly Clear | 3 mph SSW | 0% |
| Sunday | 97°F | Mostly Sunny | 1 to 6 mph SW | 0% |
| Sunday Night | 71°F | Partly Cloudy | 3 mph N | 13% |
| Monday | 90°F | Partly Sunny then Chance Showers And Thunderstorms | 2 to 6 mph NNE | 40% |
| Monday Night | 64°F | Chance Showers And Thunderstorms | 3 to 7 mph NNE | 40% |
| Tuesday | 80°F | Chance Showers And Thunderstorms | 6 to 12 mph N | 35% |
| Tuesday Night | 59°F | Partly Cloudy | 5 to 12 mph N | 13% |
| Wednesday | 79°F | Mostly Sunny | 8 mph N | 1% |
| Wednesday Night | 57°F | Partly Cloudy | 2 to 8 mph NNE | 1% |
| Thursday | 80°F | Mostly Sunny | 2 to 7 mph NNE | 3% |
| Thursday Night | 59°F | Partly Cloudy | 2 to 6 mph NNE | 4% |
| Friday | 80°F | Mostly Sunny | 3 to 8 mph NNE | 4% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Cairo, IL
Last spring frost
Apr 2
First fall frost
Oct 31
Growing season
211 days
Hardiness zone
7a
Explore more for Cairo, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Cairo 3N, Il (1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.