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.
Today
79°F
Sunny
Sunny, with a high near 79. Southwest wind 5 to 8 mph.
7-day forecast for Hannawa Falls
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 79°F | Sunny | 5 to 8 mph SW | 0% |
| Tonight | 60°F | Clear | 7 mph S | 1% |
| Wednesday | 84°F | Sunny | 6 mph SW | 0% |
| Wednesday Night | 66°F | Partly Cloudy then Slight Chance Rain Showers | 1 to 5 mph S | 16% |
| Thursday | 84°F | Showers And Thunderstorms Likely | 5 mph SW | 70% |
| Thursday Night | 66°F | Showers And Thunderstorms Likely | 5 mph SW | 70% |
| Friday | 81°F | Showers And Thunderstorms Likely | 5 mph SW | 61% |
| Friday Night | 64°F | Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms | 3 mph SW | 61% |
| Saturday | 82°F | Chance Showers And Thunderstorms | 6 mph SW | 35% |
| Saturday Night | 65°F | Chance Showers And Thunderstorms | 6 mph SW | 30% |
| Sunday | 82°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 6 to 12 mph SW | 24% |
| Sunday Night | 65°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 10 mph SW | 48% |
| Monday | 80°F | Rain Showers Likely | 10 mph SW | 58% |
| Monday Night | 61°F | Chance Showers And Thunderstorms | 3 to 9 mph SW | 58% |
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 Aug 4, 2026.