New Berlin, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for New Berlin, a city in Waukesha County, Wisconsin.
Today
83°F
Mostly Sunny
Mostly sunny, with a high near 83. Southwest wind around 10 mph.
7-day forecast for New Berlin
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Mostly Sunny | 10 mph SW | 4% |
| Tonight | 66°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 83% |
| Wednesday | 75°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 mph W | 79% |
| Wednesday Night | 61°F | Chance Showers And Thunderstorms | 0 to 5 mph NW | 48% |
| Thursday | 77°F | Chance Rain Showers then Mostly Sunny | 0 to 5 mph NE | 25% |
| Thursday Night | 59°F | Mostly Clear | 0 to 5 mph S | 12% |
| Friday | 81°F | Sunny | 0 to 5 mph SW | 2% |
| Friday Night | 63°F | Mostly Clear | 5 mph S | 7% |
| Saturday | 82°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 15% |
| Saturday Night | 67°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 28% |
| Sunday | 84°F | Chance Showers And Thunderstorms | 10 to 15 mph SW | 28% |
| Sunday Night | 66°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 to 10 mph SW | 51% |
| Monday | 82°F | Chance Rain Showers | 5 to 10 mph S | 45% |
| Monday Night | 66°F | Chance Showers And Thunderstorms | 5 to 10 mph W | 44% |
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 Aug 4, 2026.