Alpha, IL Weather & Growing Conditions
Tonight
51°F
Showers And Thunderstorms
Showers and thunderstorms. Mostly cloudy. Low around 51, with temperatures rising to around 53 overnight. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 51°F | Showers And Thunderstorms | 15 mph S | 81% |
| Wednesday | 56°F | Chance Rain Showers | 15 mph SW | 27% |
| Wednesday Night | 44°F | Mostly Cloudy | 15 mph SW | 12% |
| Thursday | 55°F | Chance Rain Showers | 10 to 15 mph W | 29% |
| Thursday Night | 42°F | Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NW | 31% |
| Friday | 52°F | Partly Sunny | 5 to 15 mph N | 13% |
| Friday Night | 35°F | Partly Cloudy | 0 to 5 mph N | 1% |
| Saturday | 52°F | Mostly Sunny | 0 to 5 mph W | 3% |
| Saturday Night | 35°F | Partly Cloudy | 0 to 5 mph W | 3% |
| Sunday | 58°F | Sunny | 5 to 10 mph W | 11% |
| Sunday Night | 36°F | Mostly Clear | 5 mph W | 3% |
| Monday | 63°F | Sunny | 5 to 15 mph SW | 1% |
| Monday Night | 41°F | Mostly Clear | 5 to 10 mph W | 0% |
| Tuesday | 64°F | Sunny | 5 to 10 mph NW | 0% |
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 Nov 4, 2026.