Altmar, NY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Altmar, a community in Oswego County, New York.
Overnight
52°F
Mostly Cloudy
Mostly cloudy, with a low around 52. Southeast wind around 6 mph.
7-day forecast for Altmar
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 52°F | Mostly Cloudy | 6 mph SE | 0% |
| Wednesday | 75°F | Mostly Sunny | 5 to 8 mph SE | 0% |
| Wednesday Night | 58°F | Rain Showers | 8 mph SE | 96% |
| Thursday | 69°F | Rain Showers | 3 to 7 mph SW | 96% |
| Thursday Night | 48°F | Chance Rain Showers | 2 mph SW | 36% |
| Friday | 63°F | Slight Chance Rain Showers | 3 mph SW | 16% |
| Friday Night | 43°F | Chance Rain Showers | 2 mph N | 34% |
| Saturday | 56°F | Chance Rain Showers | 2 to 6 mph NW | 49% |
| Saturday Night | 37°F | Chance Rain Showers | 5 mph W | 49% |
| Sunday | 52°F | Chance Rain Showers then Chance Light Rain | 3 to 7 mph W | 34% |
| Sunday Night | 34°F | Chance Light Rain then Chance Rain Showers | 3 mph W | 44% |
| Monday | 52°F | Chance Light Rain | 3 to 9 mph NW | 44% |
| Monday Night | 33°F | Chance Light Rain then Chance Rain Showers | 5 mph SW | 39% |
| Tuesday | 53°F | Chance Light Rain | 5 to 10 mph SW | 36% |
Forecast source: National Weather Service (api.weather.gov) for Altmar (43.512, -76.006). Updated through the day.
Growing snapshot for Altmar
Last spring frost
May 10
First fall frost
Oct 14
Growing season
156 days
Hardiness zone
5b
More local growing data for Altmar: nearby ZIP 13302 weather · frost dates · planting calendar · New York frost dates
Nearby towns & communities
Central Square
Constantia
Fulton
Hannibal
Lacona
Mexico
Minetto
Oswego
Parish
Phoenix
Pulaski
Sand Ridge
Sandy Creek
SUNY Oswego
Climate data from the nearest NOAA station, Pulaski, Ny (9 mi from Altmar). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.