DeKalb Junction, NY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for DeKalb Junction, a community in St. Lawrence County, New York.
Overnight
38°F
Partly Cloudy
Partly cloudy, with a low around 38. North wind around 6 mph.
7-day forecast for DeKalb Junction
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 38°F | Partly Cloudy | 6 mph N | 0% |
| Saturday | 63°F | Sunny | 6 mph NE | 0% |
| Saturday Night | 44°F | Mostly Cloudy then Chance Light Rain | 1 to 5 mph E | 34% |
| Sunday | 61°F | Light Rain Likely | 5 mph E | 59% |
| Sunday Night | 44°F | Slight Chance Light Rain then Partly Cloudy | 1 to 5 mph N | 19% |
| Monday | 60°F | Partly Sunny | 6 to 9 mph N | 0% |
| Monday Night | 42°F | Mostly Cloudy | 3 to 7 mph NE | 1% |
| Tuesday | 62°F | Partly Sunny | 5 to 10 mph NE | 1% |
| Tuesday Night | 42°F | Partly Cloudy | 2 to 9 mph NE | 2% |
| Wednesday | 65°F | Mostly Sunny | 2 to 7 mph NE | 6% |
| Wednesday Night | 45°F | Mostly Cloudy then Slight Chance Rain Showers | 1 to 6 mph E | 16% |
| Thursday | 65°F | Slight Chance Rain Showers | 2 to 6 mph NE | 22% |
| Thursday Night | 47°F | Slight Chance Rain Showers | 1 to 6 mph NE | 23% |
| Friday | 67°F | Slight Chance Rain Showers | 2 to 7 mph N | 15% |
Forecast source: National Weather Service (api.weather.gov) for DeKalb Junction (44.512, -75.298). Updated through the day.
Growing snapshot for DeKalb Junction
Last spring frost
May 9
First fall frost
Sep 30
Growing season
142 days
Hardiness zone
4b
More local growing data for DeKalb Junction: nearby ZIP 13630 weather · frost dates · planting calendar · New York frost dates
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Climate data from the nearest NOAA station, Canton 4 Se, Ny (11.3 mi from DeKalb Junction). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.