Arthur, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Arthur, a village in Moultrie County, Illinois.
This Afternoon
87°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 5pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 87. East northeast wind around 9 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Arthur
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 87°F | Chance Showers And Thunderstorms | 9 mph ENE | 33% |
| Tonight | 70°F | Partly Cloudy | 9 mph ESE | 12% |
| Saturday | 91°F | Chance Showers And Thunderstorms | 7 to 12 mph SSW | 32% |
| Saturday Night | 69°F | Mostly Cloudy then Slight Chance Showers And Thunderstorms | 8 mph S | 16% |
| Sunday | 87°F | Chance Showers And Thunderstorms | 3 to 10 mph NW | 32% |
| Sunday Night | 61°F | Chance Showers And Thunderstorms | 9 to 13 mph NE | 62% |
| Monday | 73°F | Showers And Thunderstorms Likely | 14 mph NE | 67% |
| Monday Night | 54°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 59% |
| Tuesday | 69°F | Chance Showers And Thunderstorms | 14 mph NE | 33% |
| Tuesday Night | 52°F | Mostly Cloudy | 7 to 14 mph NNE | 9% |
| Wednesday | 71°F | Partly Sunny | 10 mph NNE | 2% |
| Wednesday Night | 52°F | Partly Cloudy | 5 to 10 mph NNE | 2% |
| Thursday | 73°F | Mostly Sunny | 6 to 9 mph NNE | 3% |
| Thursday Night | 54°F | Partly Cloudy | 5 to 8 mph NNE | 4% |
Forecast source: National Weather Service (api.weather.gov) for Arthur (39.714, -88.470). Updated through the day.
Growing snapshot for Arthur
Last spring frost
Apr 15
First fall frost
Oct 20
Growing season
188 days
Hardiness zone
6a
More local growing data for Arthur: nearby ZIP 61911 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Tuscola, Il (11.5 mi from Arthur). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.