Watertown, WI Weather & Growing Conditions
Today
62°F
Slight Chance Rain Showers
A slight chance of rain showers. Cloudy. High near 62, with temperatures falling to around 54 in the afternoon. Southwest wind around 15 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 62°F | Slight Chance Rain Showers | 15 mph SW | 17% |
| Tonight | 45°F | Chance Rain Showers | 10 to 15 mph SW | 52% |
| Thursday | 54°F | Rain Showers Likely then Chance Light Rain | 10 to 15 mph W | 67% |
| Thursday Night | 37°F | Slight Chance Light Rain then Mostly Cloudy | 10 to 15 mph N | 22% |
| Friday | 47°F | Partly Sunny | 5 to 15 mph N | 7% |
| Friday Night | 29°F | Mostly Clear | 0 to 5 mph N | 0% |
| Saturday | 50°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 32°F | Mostly Clear | 0 to 5 mph W | 3% |
| Sunday | 56°F | Sunny | 5 to 10 mph W | 7% |
| Sunday Night | 33°F | Mostly Clear | 0 to 5 mph W | 0% |
| Monday | 59°F | Sunny | 0 to 10 mph SW | 0% |
| Monday Night | 38°F | Mostly Clear | 5 mph W | 1% |
| Tuesday | 59°F | Sunny | 5 to 10 mph NW | 2% |
| Tuesday Night | 36°F | Partly Cloudy | 0 to 5 mph NW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Watertown, WI
Last spring frost
Apr 28
First fall frost
Oct 12
Growing season
167 days
Hardiness zone
5a
Explore more for Watertown, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Watertown Wwtp, Wi (5.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.