Greenwich, New Jersey Weather
Cicadas claim the afternoon. Day 15 of summer. Read this microseason across nine climate regions →
Greenwich weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Rain44%0.20″92°75°—
- MondayJul 6Showers78%0.16″87°72°-5°
- TuesdayJul 7Heavy Drizzle65%—78°69°-9°
- WednesdayJul 8Overcast32%—80°65°+2°
- ThursdayJul 9Light Drizzle22%—90°67°+10°
- FridayJul 10Overcast34%—96°73°+6°
- SaturdayJul 11Overcast28%—86°66°-10°
AQI 86 (Moderate), driven by PM2.5. AQI down 70 over the last 6 hours — air quality is improving sharply. PM2.5 at 8.9 µg/m³, PM10 at 9.6 µg/m³ — typical background levels with no transport signature.
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 42. Overcast through the UV peak window (cloud cover ~93%) — afternoon ozone should stay flat.
- Present
- AQI 42
- UV peak
- 3.3 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 9
PM × Wind × Precip
PM2.5 at 8.9 µg/m³, PM10 at 9.6 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.93
- Wind
- light
- Recent rain
- 1h in last 6h
- Pattern
- background
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
- 11:18 PM
- Moonset
- 11:11 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Greenwich at a glance
- Today vs. normal: 4°F above the seasonal normal for this latitude
- Last frost: April 12 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 08323
15-Day Forecast — Greenwich
- Sun92°75°44%
- Mon87°72°78%
- Tue78°69°65%
- Wed80°65°32%
- Thu90°67°22%
- Fri96°73°34%
- Sat86°66°28%
- Sun81°67°16%
- Mon86°61°12%
- Tue84°64°11%
- Wed91°69°27%
- Thu90°67°29%
- Fri88°66°26%
- Sat88°70°36%
- Sun93°73°42%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 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 — Greenwich
SPC has placed Greenwich in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWSLGTSlight Risk
- DAY 3TSTMGeneral Thunderstorms
Scattered severe storms possible. A few tornadoes, hail, and damaging wind gusts possible.
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.
ZIP codes in Greenwich
- 08323