Watertown, WI Weather & Growing Conditions
Overnight
58°F
Light Rain
Rain. Cloudy, with a low around 58. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 58°F | Light Rain | 10 to 15 mph S | 75% |
| Wednesday | 61°F | Slight Chance Light Rain | 10 to 15 mph S | 24% |
| Wednesday Night | 45°F | Cloudy then Chance Light Rain | 15 mph SW | 45% |
| Thursday | 54°F | Light Rain Likely | 10 to 15 mph W | 64% |
| Thursday Night | 36°F | Slight Chance Light Rain then Mostly Cloudy | 10 mph N | 24% |
| Friday | 48°F | Partly Sunny | 5 to 15 mph N | 6% |
| Friday Night | 29°F | Partly Cloudy | 0 to 5 mph N | 0% |
| Saturday | 50°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 31°F | Mostly Clear | 0 to 5 mph W | 2% |
| 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 | Mostly Sunny | 0 to 10 mph SW | 0% |
| Monday Night | 38°F | Mostly Clear | 5 to 10 mph W | 1% |
| Tuesday | 60°F | Sunny | 5 to 10 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
5b
Explore more for Watertown, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Watertown Wwtp, Wi (2.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.