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
57°F
Slight Chance Rain Showers
A slight chance of rain showers. Cloudy. Low around 57, with temperatures rising to around 60 overnight. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for New Milford
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 57°F | Slight Chance Rain Showers | 15 mph S | 19% |
| Wednesday | 61°F | Patchy Drizzle | 15 mph SSW | 19% |
| Wednesday Night | 45°F | Patchy Drizzle | 15 mph SW | 28% |
| Thursday | 55°F | Chance Rain Showers | 10 to 15 mph W | 35% |
| Thursday Night | 38°F | Slight Chance Rain Showers then Mostly Cloudy | 10 mph NNW | 24% |
| Friday | 49°F | Partly Sunny | 10 to 15 mph N | 5% |
| Friday Night | 29°F | Partly Cloudy | 0 to 10 mph NNW | 0% |
| Saturday | 51°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 31°F | Mostly Clear | 0 to 5 mph W | 1% |
| Sunday | 56°F | Sunny | 5 to 10 mph W | 5% |
| Sunday Night | 32°F | Mostly Clear | 0 to 5 mph W | 0% |
| Monday | 61°F | Sunny | 0 to 10 mph SW | 0% |
| Monday Night | 37°F | Mostly Clear | 5 to 10 mph WSW | 0% |
| Tuesday | 62°F | Sunny | 5 mph WNW | 0% |
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 Nov 4, 2026.