New Milford, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for New Milford, a village in Winnebago County, Illinois.
Overnight
61°F
Mostly Clear
Mostly clear, with a low around 61. South wind around 5 mph.
7-day forecast for New Milford
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 61°F | Mostly Clear | 5 mph S | 0% |
| Tuesday | 84°F | Mostly Sunny | 5 to 10 mph SSW | 4% |
| Tuesday Night | 65°F | Chance Showers And Thunderstorms | 0 to 5 mph WSW | 71% |
| Wednesday | 77°F | Showers And Thunderstorms Likely | 0 to 5 mph W | 74% |
| Wednesday Night | 59°F | Showers And Thunderstorms | 0 to 5 mph NW | 75% |
| Thursday | 78°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 0 to 5 mph NE | 37% |
| Thursday Night | 58°F | Slight Chance Showers And Thunderstorms then Mostly Clear | 0 to 5 mph ENE | 15% |
| Friday | 81°F | Mostly Sunny | 0 to 5 mph SSE | 8% |
| Friday Night | 61°F | Mostly Clear | 0 to 5 mph SSW | 8% |
| Saturday | 83°F | Mostly Sunny | 5 to 10 mph SSW | 10% |
| Saturday Night | 67°F | Mostly Clear then Slight Chance Showers And Thunderstorms | 5 mph SSW | 21% |
| Sunday | 85°F | Slight Chance Showers And Thunderstorms | 5 to 15 mph SW | 21% |
| Sunday Night | 67°F | Chance Showers And Thunderstorms | 5 to 10 mph S | 41% |
| Monday | 84°F | Chance Showers And Thunderstorms | 5 to 10 mph SSW | 39% |
Forecast source: National Weather Service (api.weather.gov) for New Milford (42.169, -89.070). Updated through the day.
Growing snapshot for New Milford
Last spring frost
Apr 24
First fall frost
Oct 17
Growing season
174 days
Hardiness zone
5b
More local growing data for New Milford: nearby ZIP 61109 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Cherry Valley
Durand
Loves Park
Machesney Park
Pecatonica
Rockford
Rockton
Roscoe
South Beloit
Westlake Village
Winnebago
Climate data from the nearest NOAA station, Rockford Gtr Rockford Ap, Il (1.9 mi from New Milford). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.