Hannawa Falls, NY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hannawa Falls, a community in St. Lawrence County, New York.
Overnight
55°F
Partly Cloudy
Partly cloudy. Low around 55, with temperatures rising to around 61 overnight. South wind around 9 mph.
7-day forecast for Hannawa Falls
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 55°F | Partly Cloudy | 9 mph S | 6% |
| Wednesday | 76°F | Mostly Sunny | 3 to 10 mph SW | 6% |
| Wednesday Night | 57°F | Mostly Cloudy then Slight Chance Rain Showers | 6 to 10 mph S | 20% |
| Thursday | 67°F | Rain Showers | 12 mph SW | 96% |
| Thursday Night | 49°F | Mostly Cloudy then Patchy Fog | 6 to 9 mph SW | 1% |
| Friday | 62°F | Patchy Fog then Slight Chance Light Rain | 2 to 6 mph W | 16% |
| Friday Night | 42°F | Slight Chance Light Rain | 5 mph NE | 24% |
| Saturday | 51°F | Chance Light Rain | 7 mph NE | 45% |
| Saturday Night | 35°F | Chance Light Rain | 5 mph NW | 50% |
| Sunday | 49°F | Chance Light Rain | 6 to 9 mph W | 40% |
| Sunday Night | 32°F | Chance Light Rain | 6 mph SW | 29% |
| Monday | 48°F | Chance Light Rain | 6 to 10 mph W | 29% |
| Monday Night | 32°F | Slight Chance Light Rain then Mostly Cloudy | 6 mph SW | 22% |
| Tuesday | 50°F | Chance Light Rain | 7 to 13 mph SW | 47% |
Forecast source: National Weather Service (api.weather.gov) for Hannawa Falls (44.601, -74.975). Updated through the day.
Growing snapshot for Hannawa Falls
Last spring frost
May 5
First fall frost
Oct 8
Growing season
156 days
Hardiness zone
4b
More local growing data for Hannawa Falls: nearby ZIP 13647 weather · frost dates · planting calendar · New York frost dates
Nearby towns & communities
Brasher Falls
Canton
Colton
Cranberry Lake
DeKalb Junction
Edwards
Gouverneur
Hailesboro
Hammond
Hermon
Heuvelton
Madrid
Massena
Norfolk
Norwood
Ogdensburg
Parishville
Potsdam
Rensselaer Falls
Richville
Star Lake
Waddington
Winthrop
Climate data from the nearest NOAA station, Colton 2 N, Ny (2.1 mi from Hannawa Falls). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.