Barnum Island, NY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Barnum Island, a community in Nassau County, New York.
This Afternoon
68°F
Sunny
Sunny. High near 68, with temperatures falling to around 64 in the afternoon. South wind around 10 mph.
7-day forecast for Barnum Island
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 68°F | Sunny | 10 mph S | 0% |
| Tonight | 59°F | Partly Cloudy | 7 to 10 mph S | 1% |
| Thursday | 68°F | Chance Light Rain | 8 to 14 mph S | 25% |
| Thursday Night | 60°F | Light Rain Likely | 6 to 13 mph SW | 71% |
| Friday | 67°F | Rain | 6 mph SW | 75% |
| Friday Night | 54°F | Rain | 5 mph NW | 75% |
| Saturday | 64°F | Mostly Sunny | 6 to 12 mph W | 9% |
| Saturday Night | 48°F | Partly Cloudy then Slight Chance Light Rain | 12 to 15 mph NW | 20% |
| Sunday | 60°F | Slight Chance Light Rain then Mostly Sunny | 16 mph NW | 20% |
| Sunday Night | 47°F | Partly Cloudy | 15 mph W | 0% |
| Monday | 59°F | Sunny | 14 to 17 mph W | 6% |
| Monday Night | 47°F | Mostly Clear | 14 mph W | 6% |
| Tuesday | 62°F | Sunny | 13 to 16 mph W | 1% |
| Tuesday Night | 47°F | Mostly Clear | 9 to 13 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov) for Barnum Island (40.605, -73.643). Updated through the day.
Growing snapshot for Barnum Island
Last spring frost
Apr 7
First fall frost
Nov 8
Growing season
212 days
Hardiness zone
7b
More local growing data for Barnum Island: nearby ZIP 11558 weather · frost dates · planting calendar · New York frost dates
Nearby towns & communities
Albertson
Atlantic Beach
Baldwin
Baxter Estates
Bay Park
Bayville
Bellerose
Bellmore
Bethpage
Brookville
Carle Place
Cedarhurst
Centre Island
Cove Neck
East Atlantic Beach
East Hills
East Massapequa
East Meadow
East Norwich
East Rockaway
East Williston
Elmont
Floral Park
Flower Hill
Franklin Square
Freeport
Garden City
Garden City Park
Garden City South
Glen Cove
Climate data from the nearest NOAA station, Oceanside, Ny (2.2 mi from Barnum Island). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.