Alvan (Alvin), IL Weather & Growing Conditions
Tonight
59°F
Chance Light Rain then Rain Showers
A chance of rain and a slight chance of thunderstorms before midnight, then rain showers. Mostly cloudy, with a low around 59. South wind around 16 mph, with gusts as high as 28 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 59°F | Chance Light Rain then Rain Showers | 16 mph S | 84% |
| Wednesday | 66°F | Chance Light Rain then Mostly Cloudy | 10 to 14 mph SSW | 30% |
| Wednesday Night | 46°F | Mostly Cloudy | 8 mph SW | 1% |
| Thursday | 63°F | Mostly Sunny | 7 to 12 mph WSW | 4% |
| Thursday Night | 44°F | Mostly Cloudy | 1 to 5 mph WNW | 11% |
| Friday | 56°F | Slight Chance Light Rain then Partly Sunny | 2 to 8 mph NNW | 17% |
| Friday Night | 36°F | Mostly Cloudy | 2 to 7 mph NNW | 8% |
| Saturday | 55°F | Mostly Sunny | 3 mph NW | 5% |
| Saturday Night | 33°F | Partly Cloudy | 1 mph WNW | 2% |
| Sunday | 60°F | Mostly Sunny | 1 to 7 mph W | 9% |
| Sunday Night | 33°F | Mostly Clear | 5 mph WNW | 10% |
| Monday | 63°F | Sunny | 2 to 8 mph WSW | 5% |
| Monday Night | 38°F | Mostly Clear | 5 mph WSW | 2% |
| Tuesday | 66°F | Sunny | 6 mph W | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Alvan (Alvin), IL
Last spring frost
Apr 21
First fall frost
Oct 20
Growing season
181 days
Hardiness zone
6a
Explore more for Alvan (Alvin), IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Danville, Il (10.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.