Alpha, IL Weather & Growing Conditions
Tonight
68°F
Mostly Cloudy then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 68. Southeast wind 10 to 15 mph. Chance of precipitation is 40%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 68°F | Mostly Cloudy then Chance Showers And Thunderstorms | 10 to 15 mph SE | 44% |
| Saturday | 83°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 to 10 mph S | 55% |
| Saturday Night | 65°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 mph N | 77% |
| Sunday | 72°F | Showers And Thunderstorms | 5 to 15 mph NE | 77% |
| Sunday Night | 58°F | Showers And Thunderstorms Likely | 15 mph NE | 65% |
| Monday | 64°F | Showers And Thunderstorms Likely | 15 to 20 mph NE | 62% |
| Monday Night | 53°F | Chance Rain Showers | 15 mph NE | 48% |
| Tuesday | 63°F | Chance Rain Showers | 15 mph NE | 39% |
| Tuesday Night | 49°F | Mostly Cloudy | 5 to 15 mph NE | 5% |
| Wednesday | 67°F | Mostly Sunny | 10 mph NE | 2% |
| Wednesday Night | 52°F | Partly Cloudy | 5 mph NE | 2% |
| Thursday | 68°F | Mostly Sunny | 5 mph NE | 4% |
| Thursday Night | 54°F | Partly Cloudy | 0 to 5 mph NE | 5% |
| Friday | 70°F | Mostly Sunny | 5 mph NE | 5% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Alpha, IL
Last spring frost
Apr 28
First fall frost
Oct 12
Growing season
165 days
Hardiness zone
5b
Explore more for Alpha, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Altona, Il (11.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.