New Berlin, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for New Berlin, a city in Waukesha County, Wisconsin.
Tonight
59°F
Light Rain
Rain. Cloudy, with a low around 59. South wind 10 to 15 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for New Berlin
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 59°F | Light Rain | 10 to 15 mph S | 82% |
| Wednesday | 61°F | Chance Light Rain then Cloudy | 10 to 15 mph S | 41% |
| Wednesday Night | 46°F | Cloudy | 15 mph SW | 12% |
| Thursday | 54°F | Cloudy then Light Rain Likely | 10 to 15 mph W | 61% |
| Thursday Night | 40°F | Chance Light Rain | 5 to 10 mph NW | 54% |
| Friday | 49°F | Slight Chance Light Rain | 10 to 15 mph N | 24% |
| Friday Night | 34°F | Mostly Cloudy | 5 to 10 mph N | 6% |
| Saturday | 51°F | Mostly Sunny | 5 mph W | 3% |
| Saturday Night | 34°F | Partly Cloudy | 5 mph W | 7% |
| Sunday | 56°F | Mostly Sunny then Slight Chance Light Rain | 5 to 10 mph W | 19% |
| Sunday Night | 36°F | Mostly Clear | 5 to 10 mph W | 6% |
| Monday | 59°F | Mostly Sunny | 5 to 15 mph SW | 2% |
| Monday Night | 40°F | Partly Cloudy | 10 mph W | 2% |
| Tuesday | 59°F | Mostly Sunny | 5 to 10 mph NW | 0% |
Forecast source: National Weather Service (api.weather.gov) for New Berlin (42.972, -88.129). Updated through the day.
Growing snapshot for New Berlin
Last spring frost
May 1
First fall frost
Oct 13
Growing season
162 days
Hardiness zone
5b
More local growing data for New Berlin: nearby ZIP 53146 weather · frost dates · planting calendar · Wisconsin frost dates
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Climate data from the nearest NOAA station, Waukesha Wwtp, Wi (5.3 mi from New Berlin). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.