Nelson, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Nelson, a village in Lee County, Illinois.
This Afternoon
74°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 5pm. Mostly cloudy, with a high near 74. East southeast wind 10 to 15 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Nelson
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 74°F | Chance Showers And Thunderstorms | 10 to 15 mph ESE | 44% |
| Tonight | 64°F | Mostly Cloudy then Chance Showers And Thunderstorms | 10 mph ESE | 45% |
| Saturday | 81°F | Showers And Thunderstorms Likely | 5 to 10 mph SSE | 80% |
| Saturday Night | 63°F | Showers And Thunderstorms Likely then Showers And Thunderstorms | 5 to 10 mph NW | 78% |
| Sunday | 70°F | Showers And Thunderstorms | 10 to 15 mph NE | 78% |
| Sunday Night | 54°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 62% |
| Monday | 66°F | Chance Rain Showers | 15 mph ENE | 53% |
| Monday Night | 50°F | Chance Rain Showers | 10 to 15 mph NE | 39% |
| Tuesday | 64°F | Chance Rain Showers | 10 to 15 mph NE | 31% |
| Tuesday Night | 48°F | Mostly Cloudy | 5 to 15 mph NE | 6% |
| Wednesday | 68°F | Partly Sunny | 5 to 10 mph NNE | 4% |
| Wednesday Night | 50°F | Partly Cloudy | 0 to 5 mph NE | 4% |
| Thursday | 70°F | Mostly Sunny | 0 to 5 mph NNE | 4% |
| Thursday Night | 51°F | Partly Cloudy | 0 to 5 mph NE | 5% |
Forecast source: National Weather Service (api.weather.gov) for Nelson (41.796, -89.607). Updated through the day.
Growing snapshot for Nelson
Last spring frost
Apr 24
First fall frost
Oct 14
Growing season
172 days
Hardiness zone
5b
More local growing data for Nelson: nearby ZIP 61042 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Amboy
Ashton
Compton
Dixon
Franklin Grove
Grand Detour
Harmon
Lee
Lee Center
Lost Nation
Nachusa
Paw Paw
Steward
Sublette
West Brooklyn
Climate data from the nearest NOAA station, Walnut, Il (9.5 mi from Nelson). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.