Watertown, NY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Watertown, a city in Jefferson County, New York.
Tonight
55°F
Mostly Cloudy
Mostly cloudy, with a low around 55. South wind around 10 mph.
7-day forecast for Watertown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 55°F | Mostly Cloudy | 10 mph S | 0% |
| Wednesday | 76°F | Mostly Sunny | 8 mph S | 0% |
| Wednesday Night | 58°F | Mostly Cloudy then Rain Showers | 7 to 13 mph S | 96% |
| Thursday | 67°F | Rain Showers | 6 to 14 mph SW | 96% |
| Thursday Night | 49°F | Chance Rain Showers then Mostly Cloudy | 5 mph SW | 23% |
| Friday | 62°F | Slight Chance Rain Showers | 5 mph W | 18% |
| Friday Night | 42°F | Chance Rain Showers | 3 mph N | 33% |
| Saturday | 54°F | Chance Rain Showers | 5 to 8 mph NW | 45% |
| Saturday Night | 37°F | Chance Rain Showers | 6 mph W | 45% |
| Sunday | 51°F | Chance Rain Showers then Slight Chance Light Rain | 3 to 10 mph W | 25% |
| Sunday Night | 35°F | Slight Chance Light Rain then Chance Rain Showers | 6 mph W | 39% |
| Monday | 51°F | Chance Light Rain | 3 to 12 mph W | 39% |
| Monday Night | 35°F | Chance Light Rain then Slight Chance Rain Showers | 7 mph SW | 29% |
| Tuesday | 51°F | Chance Light Rain | 8 to 14 mph SW | 33% |
Forecast source: National Weather Service (api.weather.gov) for Watertown (43.973, -75.910). Updated through the day.
Growing snapshot for Watertown
Last spring frost
May 2
First fall frost
Oct 13
Growing season
163 days
Hardiness zone
5a
More local growing data for Watertown: nearby ZIP 13601 weather · frost dates · planting calendar · New York frost dates
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Climate data from the nearest NOAA station, Watertown, Ny (1.8 mi from Watertown). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.