New Berlin, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for New Berlin, a city in Waukesha County, Wisconsin.
This Afternoon
69°F
Chance Rain Showers
A chance of rain showers. Mostly cloudy, with a high near 69. East wind around 10 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for New Berlin
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 69°F | Chance Rain Showers | 10 mph E | 37% |
| Tonight | 59°F | Chance Rain Showers then Chance Showers And Thunderstorms | 10 to 15 mph E | 93% |
| Saturday | 71°F | Showers And Thunderstorms | 10 to 15 mph SE | 94% |
| Saturday Night | 59°F | Showers And Thunderstorms Likely | 5 to 10 mph NE | 74% |
| Sunday | 65°F | Chance Rain Showers | 15 mph NE | 50% |
| Sunday Night | 54°F | Chance Rain Showers then Mostly Cloudy | 10 to 15 mph NE | 27% |
| Monday | 62°F | Slight Chance Rain Showers | 15 mph E | 16% |
| Monday Night | 50°F | Slight Chance Rain Showers | 10 to 15 mph NE | 16% |
| Tuesday | 60°F | Slight Chance Rain Showers | 10 to 15 mph NE | 16% |
| Tuesday Night | 50°F | Mostly Cloudy | 5 to 10 mph NE | 12% |
| Wednesday | 63°F | Partly Sunny | 5 to 10 mph NE | 12% |
| Wednesday Night | 51°F | Mostly Cloudy | 5 to 10 mph NE | 6% |
| Thursday | 65°F | Partly Sunny | 5 mph NE | 3% |
| Thursday Night | 52°F | Partly Cloudy | 0 to 5 mph N | 4% |
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 Sep 18, 2026.