Stony Brook University, New York Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Stony Brook University weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 3Overcast33%—98°78°—
- SaturdayJul 4Overcast40%—98°74°0°
- SundayJul 5Overcast55%—82°71°-16°
- MondayJul 6Showers73%0.41″71°66°-11°
- TuesdayJul 7Light Showers61%0.02″73°63°+2°
- WednesdayJul 8Partly Cloudy32%—77°61°+4°
- ThursdayJul 9Overcast14%—78°65°+1°
AQI 84 (Moderate), driven by PM2.5. AQI down 32 over the last 6 hours — air quality is improving sharply. PM2.5 at 11.7 µg/m³ (AQI 56) with a 0.91 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
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 37 now. With UV 0.0 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 9 around 1 PM.
- Present
- AQI 37
- UV peak
- 0.0 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 9
PM × Wind × Precip
PM2.5 at 11.7 µg/m³ (AQI 56) with a 0.91 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.91
- 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).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 10:47 PM
- Moonset
- 9:55 AM
- In sign
- ♒︎ Aquarius
Cicadas claim the afternoon
Stony Brook University at a glance
- Today vs. normal: 12°F above the seasonal normal for this latitude
- Last frost: April 21 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
16-Day Forecast — Stony Brook University
- Fri98°78°33%
- Sat98°74°40%
- Sun82°71°55%
- Mon71°66°73%
- Tue73°63°61%
- Wed77°61°32%
- Thu78°65°14%
- Fri83°69°23%
- Sat81°69°23%
- Sun81°70°21%
- Mon85°68°21%
- Tue82°71°16%
- Wed86°71°29%
- Thu83°68°35%
- Fri89°72°48%
- Sat86°70°30%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 4, 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 — Stony Brook University
SPC has placed Stony Brook University in the Marginal Risk category for severe thunderstorms today.
- TODAYMRGLMarginal Risk
- TOMORROWMRGLMarginal Risk
- DAY 3MRGLMarginal Risk
Isolated severe storms possible. Limited threat for hail or damaging wind.
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 Stony Brook University
- Robert Moses Beach21.2 mi
- Jones Beach29.7 mi
Each linked page shows live water temperature, wave height, swim and surf verdicts, tides, and rip-current risk from NDBC + NOAA + NWS data.
ZIP codes in Stony Brook University
- 11790
- 11794