Syosset, New York Weather
Fireflies rise from the lawn. Day 78 of spring. Read this microseason across nine climate regions →
Syosset weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Partly Cloudy——86°57°—
- FridayJun 5Overcast——92°64°+6°
- SaturdayJun 6Drizzle43%—89°67°-3°
- SundayJun 7Heavy Showers43%0.83″81°66°-8°
- MondayJun 8Partly Cloudy——79°59°-2°
- TuesdayJun 9Overcast——84°64°+5°
- WednesdayJun 10Mostly Clear——87°68°+3°
PM2.5 at 17.5 µg/m³ (AQI 67) with a 0.82 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in calm air, not road dust. AQI up 48 in the last 6 hours — air quality is degrading.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 43. Overcast through the UV peak window (cloud cover ~78%) — afternoon ozone should stay flat.
- Present
- AQI 43
- UV peak
- 0.0 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 5
PM × Wind × Precip
PM2.5 at 17.5 µg/m³ (AQI 67) with a 0.82 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.82
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
The higher the clouds, the finer the weather.
- Moonrise
- 3:55 AM
- Moonset
- 1:56 PM
- In sign
- ♒︎ Aquarius
Fireflies rise from the lawn
Syosset at a glance
- Today vs. normal: 7°F below the seasonal normal for this latitude
- Last frost: April 21 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 5, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
SPC Convective Outlook
Storm Prediction Center — Syosset
SPC has placed Syosset in the General Thunderstorms category for severe thunderstorms day after tomorrow.
- TODAYNONENo severe risk
- TOMORROWNONENo severe risk
- DAY 3TSTMGeneral Thunderstorms
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.
Beaches near Syosset
- Jones Beach Beach15.3 mi
- Long Beach NY Beach17.7 mi
- Robert Moses Beach18.2 mi
Each linked page shows live water temperature, wave height, swim and surf verdicts, tides, and rip-current risk from NDBC + NOAA + NWS data.