Fulton, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fulton, a city in Whiteside County, Illinois.
Today
87°F
Mostly Sunny then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 5pm. Mostly sunny. High near 87, with temperatures falling to around 85 in the afternoon. Southwest wind 5 to 10 mph. Chance of precipitation is 20%.
7-day forecast for Fulton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 87°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 17% |
| Tonight | 66°F | Showers And Thunderstorms Likely | 0 to 5 mph NW | 89% |
| Wednesday | 77°F | Showers And Thunderstorms Likely | 5 mph NW | 73% |
| Wednesday Night | 61°F | Showers And Thunderstorms Likely | 0 to 5 mph N | 71% |
| Thursday | 80°F | Chance Rain Showers then Mostly Sunny | 0 to 5 mph NE | 36% |
| Thursday Night | 61°F | Mostly Clear | 0 mph | 6% |
| Friday | 82°F | Mostly Sunny | 0 to 5 mph SE | 4% |
| Friday Night | 64°F | Mostly Clear | 0 to 5 mph S | 8% |
| Saturday | 86°F | Sunny | 5 mph SW | 11% |
| Saturday Night | 70°F | Mostly Clear then Slight Chance Showers And Thunderstorms | 5 mph S | 20% |
| Sunday | 88°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 5 to 10 mph SW | 20% |
| Sunday Night | 69°F | Chance Showers And Thunderstorms | 5 to 10 mph S | 38% |
| Monday | 87°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 38% |
| Monday Night | 70°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 to 10 mph SW | 38% |
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 Aug 4, 2026.