Fulton, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fulton, a city in Whiteside County, Illinois.
This Afternoon
68°F
Showers And Thunderstorms
Showers and thunderstorms. Mostly cloudy. High near 68, with temperatures falling to around 65 in the afternoon. South wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Fulton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 68°F | Showers And Thunderstorms | 15 to 20 mph S | 96% |
| Tonight | 52°F | Showers And Thunderstorms | 15 mph S | 81% |
| Wednesday | 57°F | Chance Rain Showers | 15 mph SW | 30% |
| Wednesday Night | 44°F | Slight Chance Rain Showers | 10 to 15 mph SW | 22% |
| Thursday | 54°F | Chance Rain Showers | 10 mph W | 52% |
| Thursday Night | 41°F | Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NW | 27% |
| Friday | 52°F | Partly Sunny | 5 to 10 mph N | 11% |
| Friday Night | 33°F | Partly Cloudy | 0 to 5 mph N | 3% |
| Saturday | 53°F | Mostly Sunny | 0 to 5 mph W | 5% |
| Saturday Night | 34°F | Mostly Clear | 0 to 5 mph W | 3% |
| Sunday | 58°F | Sunny | 5 to 10 mph W | 9% |
| Sunday Night | 35°F | Mostly Clear | 0 to 5 mph W | 2% |
| Monday | 62°F | Sunny | 0 to 10 mph SW | 1% |
| Monday Night | 39°F | Mostly Clear | 0 to 5 mph W | 0% |
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 Nov 3, 2026.