Altmar, NY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Altmar, a community in Oswego County, New York.
Today
79°F
Areas Of Fog then Sunny
Areas of fog before 10am. Sunny, with a high near 79. Southwest wind around 5 mph.
7-day forecast for Altmar
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 79°F | Areas Of Fog then Sunny | 5 mph SW | 0% |
| Tonight | 59°F | Mostly Clear | 1 to 5 mph NE | 0% |
| Wednesday | 85°F | Mostly Sunny | 5 mph SE | 0% |
| Wednesday Night | 66°F | Mostly Cloudy then Slight Chance Rain Showers | 5 mph SE | 22% |
| Thursday | 83°F | Showers And Thunderstorms Likely | 5 mph S | 71% |
| Thursday Night | 65°F | Showers And Thunderstorms Likely | 2 mph S | 71% |
| Friday | 81°F | Chance Rain Showers then Chance Showers And Thunderstorms | 1 to 5 mph SW | 52% |
| Friday Night | 62°F | Chance Showers And Thunderstorms | 2 mph S | 52% |
| Saturday | 81°F | Chance Showers And Thunderstorms | 1 to 5 mph SW | 47% |
| Saturday Night | 63°F | Chance Showers And Thunderstorms | 3 mph SW | 37% |
| Sunday | 83°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 2 to 7 mph SW | 24% |
| Sunday Night | 64°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 mph SW | 51% |
| Monday | 80°F | Rain Showers Likely | 3 to 8 mph SW | 56% |
| Monday Night | 61°F | Chance Showers And Thunderstorms | 2 to 7 mph SW | 56% |
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 Aug 4, 2026.