New Berlin, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for New Berlin, a village in Sangamon County, Illinois.
Tonight
52°F
Showers And Thunderstorms
Showers and thunderstorms before 4am. Cloudy, with a low around 52. South wind 13 to 20 mph, with gusts as high as 29 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for New Berlin
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 52°F | Showers And Thunderstorms | 13 to 20 mph S | 95% |
| Wednesday | 59°F | Mostly Cloudy | 12 to 15 mph SW | 10% |
| Wednesday Night | 42°F | Mostly Cloudy | 9 mph WSW | 1% |
| Thursday | 61°F | Mostly Sunny | 8 to 13 mph WSW | 4% |
| Thursday Night | 41°F | Mostly Cloudy then Slight Chance Light Rain | 7 mph NW | 22% |
| Friday | 56°F | Mostly Cloudy | 7 to 10 mph NNW | 12% |
| Friday Night | 35°F | Mostly Cloudy | 2 to 8 mph NNW | 2% |
| Saturday | 54°F | Mostly Sunny | 3 mph NW | 1% |
| Saturday Night | 34°F | Partly Cloudy | 2 mph W | 1% |
| Sunday | 60°F | Sunny | 2 to 8 mph W | 7% |
| Sunday Night | 34°F | Mostly Clear | 6 mph W | 4% |
| Monday | 64°F | Sunny | 3 to 9 mph SW | 2% |
| Monday Night | 39°F | Mostly Clear | 7 mph SW | 1% |
| Tuesday | 66°F | Sunny | 6 mph WNW | 1% |
Forecast source: National Weather Service (api.weather.gov) for New Berlin (39.726, -89.914). Updated through the day.
Growing snapshot for New Berlin
Last spring frost
Apr 15
First fall frost
Oct 22
Growing season
188 days
Hardiness zone
6a
More local growing data for New Berlin: nearby ZIP 62670 weather · frost dates · planting calendar · Illinois frost dates
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Climate data from the nearest NOAA station, Springfield #2, Il (12.3 mi from New Berlin). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.