Three Mile Bay, NY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Three Mile Bay, a community in Jefferson County, New York.
Overnight
46°F
Chance Rain Showers
A chance of rain showers after 3am. Mostly cloudy, with a low around 46. East wind around 3 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Three Mile Bay
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 46°F | Chance Rain Showers | 3 mph E | 44% |
| Sunday | 63°F | Rain Showers | 3 to 10 mph NE | 87% |
| Sunday Night | 45°F | Partly Cloudy | 5 to 10 mph NE | 0% |
| Monday | 61°F | Partly Sunny | 12 mph NE | 0% |
| Monday Night | 43°F | Mostly Cloudy | 7 to 10 mph NE | 0% |
| Tuesday | 63°F | Mostly Sunny | 8 to 12 mph NE | 0% |
| Tuesday Night | 44°F | Partly Cloudy | 5 to 10 mph NE | 1% |
| Wednesday | 68°F | Mostly Sunny | 6 to 9 mph NE | 1% |
| Wednesday Night | 45°F | Partly Cloudy | 3 to 8 mph E | 3% |
| Thursday | 66°F | Mostly Sunny | 5 to 8 mph E | 6% |
| Thursday Night | 45°F | Mostly Cloudy | 3 to 7 mph NE | 10% |
| Friday | 66°F | Partly Sunny then Slight Chance Rain Showers | 5 to 10 mph NE | 20% |
| Friday Night | 46°F | Slight Chance Rain Showers then Mostly Cloudy | 3 to 9 mph NE | 20% |
| Saturday | 68°F | Partly Sunny | 6 to 10 mph NE | 12% |
Forecast source: National Weather Service (api.weather.gov) for Three Mile Bay (44.085, -76.197). Updated through the day.
Growing snapshot for Three Mile Bay
Last spring frost
May 11
First fall frost
Oct 1
Growing season
140 days
Hardiness zone
5a
More local growing data for Three Mile Bay: nearby ZIP 13622 weather · frost dates · planting calendar · New York frost dates
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Climate data from the nearest NOAA station, Watertown Intl Ap, Ny (8.5 mi from Three Mile Bay). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.