Arlington, IL Weather & Growing Conditions
This Afternoon
78°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 4pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 78. South wind around 5 mph. Chance of precipitation is 50%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 78°F | Chance Showers And Thunderstorms | 5 mph S | 53% |
| Tonight | 66°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 mph S | 91% |
| Sunday | 70°F | Patchy Fog | 5 to 15 mph NE | 70% |
| Sunday Night | 57°F | Chance Rain Showers | 15 mph NE | 45% |
| Monday | 64°F | Rain Showers Likely | 15 mph E | 59% |
| Monday Night | 53°F | Rain Showers Likely | 10 to 15 mph NE | 58% |
| Tuesday | 62°F | Rain Showers Likely | 15 mph NE | 56% |
| Tuesday Night | 51°F | Mostly Cloudy | 10 to 15 mph NE | 14% |
| Wednesday | 65°F | Partly Sunny | 10 mph NE | 4% |
| Wednesday Night | 53°F | Partly Cloudy | 5 to 10 mph NE | 2% |
| Thursday | 68°F | Partly Sunny | 5 mph NE | 6% |
| Thursday Night | 55°F | Mostly Cloudy | 0 to 5 mph NE | 9% |
| Friday | 72°F | Partly Sunny | 5 mph NE | 8% |
| Friday Night | 54°F | Partly Cloudy | 0 to 5 mph NE | 8% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Arlington, IL
Last spring frost
Apr 22
First fall frost
Oct 17
Growing season
177 days
Hardiness zone
5b
Explore more for Arlington, IL: full frost dates · planting calendar · Illinois frost dates
Climate data from the nearest NOAA station, Princeton, Il (9.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.