Watertown, NY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Watertown, a city in Jefferson County, New York.
Overnight
57°F
Patchy Fog
Patchy fog after 5am. Mostly clear, with a low around 57. South wind around 6 mph.
7-day forecast for Watertown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 57°F | Patchy Fog | 6 mph S | 0% |
| Tuesday | 78°F | Patchy Fog then Sunny | 5 to 9 mph SW | 0% |
| Tuesday Night | 61°F | Clear | 1 to 5 mph S | 0% |
| Wednesday | 85°F | Sunny | 5 to 8 mph S | 0% |
| Wednesday Night | 69°F | Partly Cloudy then Slight Chance Rain Showers | 2 to 6 mph S | 24% |
| Thursday | 84°F | Chance Showers And Thunderstorms | 8 mph SW | 51% |
| Thursday Night | 68°F | Chance Showers And Thunderstorms | 6 mph SW | 51% |
| Friday | 81°F | Chance Rain Showers then Chance Showers And Thunderstorms | 3 to 8 mph SW | 36% |
| Friday Night | 65°F | Chance Showers And Thunderstorms | 2 to 6 mph SW | 49% |
| Saturday | 82°F | Chance Showers And Thunderstorms | 3 to 9 mph SW | 49% |
| Saturday Night | 66°F | Slight Chance Showers And Thunderstorms | 7 mph SW | 23% |
| Sunday | 82°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 6 to 12 mph SW | 20% |
| Sunday Night | 66°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 9 mph SW | 48% |
| Monday | 80°F | Chance Rain Showers | 8 to 13 mph SW | 52% |
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
Nearby towns & communities
Adams
Adams Center
Alexandria Bay
Antwerp
Belleville
Black River
Brownville
Calcium
Cape Vincent
Carthage
Chaumont
Clayton
Deferiet
Depauville
Dexter
Ellisburg
Evans Mills
Felts Mills
Fishers Landing
Fort Drum
Glen Park
Great Bend
Henderson
Herrings
La Fargeville
Lorraine
Mannsville
Oxbow
Pamelia Center
Philadelphia
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 Aug 4, 2026.