Fulton, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fulton, a city in Whiteside County, Illinois.
This Afternoon
72°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms before 5pm. Partly sunny, with a high near 72. Southeast wind around 10 mph. Chance of precipitation is 20%.
7-day forecast for Fulton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 72°F | Slight Chance Showers And Thunderstorms | 10 mph SE | 23% |
| Tonight | 64°F | Mostly Cloudy then Chance Showers And Thunderstorms | 5 to 10 mph SE | 74% |
| Saturday | 81°F | Showers And Thunderstorms | 5 mph S | 75% |
| Saturday Night | 63°F | Showers And Thunderstorms Likely | 5 mph N | 74% |
| Sunday | 70°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 73% |
| Sunday Night | 55°F | Rain Showers Likely | 10 to 15 mph NE | 65% |
| Monday | 66°F | Chance Rain Showers | 10 to 15 mph NE | 53% |
| Monday Night | 51°F | Chance Rain Showers | 10 to 15 mph NE | 49% |
| Tuesday | 64°F | Chance Rain Showers | 10 to 15 mph NE | 34% |
| Tuesday Night | 48°F | Mostly Cloudy | 5 to 10 mph NE | 6% |
| Wednesday | 68°F | Mostly Sunny | 5 to 10 mph NE | 3% |
| Wednesday Night | 51°F | Partly Cloudy | 0 to 5 mph NE | 2% |
| Thursday | 70°F | Mostly Sunny | 5 mph NE | 5% |
| Thursday Night | 53°F | Partly Cloudy | 0 to 5 mph NE | 5% |
Forecast source: National Weather Service (api.weather.gov) for Fulton (41.865, -90.159). Updated through the day.
Growing snapshot for Fulton
Last spring frost
Apr 13
First fall frost
Oct 26
Growing season
195 days
Hardiness zone
5b
More local growing data for Fulton: nearby ZIP 61252 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Fulton L&D #13, Il (4.5 mi from Fulton). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.