Waterloo, WI Weather & Growing Conditions
This Afternoon
70°F
Rain Showers Likely
Rain showers likely. Mostly cloudy. High near 70, with temperatures falling to around 64 in the afternoon. East wind around 10 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 70°F | Rain Showers Likely | 10 mph E | 70% |
| Tonight | 59°F | Showers And Thunderstorms | 10 to 15 mph E | 100% |
| Saturday | 72°F | Showers And Thunderstorms | 10 mph SE | 95% |
| Saturday Night | 58°F | Showers And Thunderstorms | 10 mph NE | 76% |
| Sunday | 68°F | Chance Rain Showers | 10 to 15 mph NE | 34% |
| Sunday Night | 52°F | Slight Chance Rain Showers then Mostly Cloudy | 10 to 15 mph NE | 17% |
| Monday | 64°F | Mostly Cloudy then Slight Chance Rain Showers | 10 to 15 mph NE | 17% |
| Monday Night | 48°F | Slight Chance Rain Showers | 5 to 10 mph NE | 17% |
| Tuesday | 62°F | Slight Chance Rain Showers then Partly Sunny | 10 to 15 mph NE | 15% |
| Tuesday Night | 46°F | Partly Cloudy | 5 to 10 mph NE | 7% |
| Wednesday | 66°F | Mostly Sunny | 5 to 10 mph NE | 5% |
| Wednesday Night | 48°F | Partly Cloudy | 0 to 5 mph NE | 2% |
| Thursday | 69°F | Mostly Sunny | 0 to 5 mph NE | 4% |
| Thursday Night | 50°F | Partly Cloudy | 0 to 5 mph N | 5% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Waterloo, WI
Last spring frost
Apr 30
First fall frost
Oct 9
Growing season
163 days
Hardiness zone
5b
Explore more for Waterloo, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Waterloo Wwtp, Wi (0.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.