Lena, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lena, a village in Stephenson County, Illinois.
Today
83°F
Mostly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 4pm. Mostly sunny. High near 83, with temperatures falling to around 81 in the afternoon. Southwest wind 5 to 10 mph. Chance of precipitation is 30%.
7-day forecast for Lena
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 to 10 mph SW | 29% |
| Tonight | 64°F | Showers And Thunderstorms Likely | 5 mph NW | 87% |
| Wednesday | 74°F | Showers And Thunderstorms Likely | 0 to 5 mph N | 74% |
| Wednesday Night | 58°F | Showers And Thunderstorms Likely | 0 to 5 mph NW | 55% |
| Thursday | 78°F | Slight Chance Rain Showers then Mostly Sunny | 0 to 5 mph NE | 22% |
| Thursday Night | 58°F | Mostly Clear | 0 mph | 5% |
| Friday | 80°F | Mostly Sunny | 0 to 5 mph SE | 5% |
| Friday Night | 63°F | Mostly Clear | 5 mph S | 6% |
| Saturday | 83°F | Mostly Sunny | 5 to 10 mph SW | 11% |
| Saturday Night | 68°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 24% |
| Sunday | 84°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph SW | 24% |
| Sunday Night | 68°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 42% |
| Monday | 83°F | Chance Showers And Thunderstorms | 5 to 10 mph S | 40% |
| Monday Night | 68°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 10 mph W | 42% |
Forecast source: National Weather Service (api.weather.gov) for Lena (42.379, -89.822). Updated through the day.
Growing snapshot for Lena
Last spring frost
Apr 27
First fall frost
Oct 9
Growing season
165 days
Hardiness zone
5a
More local growing data for Lena: nearby ZIP 61048 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Adeline
Cedarville
Dakota
Davis
Freeport
German Valley
Lake Summerset
Orangeville
Pearl City
Ridott
Rock City
Willow Lake
Winslow
Climate data from the nearest NOAA station, Stockton 3 Nne, Il (7.7 mi from Lena). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.