Greenwich, New Jersey Weather
Fireflies rise from the lawn. Day 76 of spring. Read this microseason across nine climate regions →
Greenwich weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Mostly Clear——83°54°—
- ThursdayJun 4Overcast——88°57°+5°
- FridayJun 5Overcast——87°61°-1°
- SaturdayJun 6Overcast10%—91°64°+4°
- SundayJun 7Light Showers47%—84°64°-7°
- MondayJun 8Overcast27%—76°56°-8°
- TuesdayJun 9Partly Cloudy12%—80°53°+4°
Ozone at AQI 91 now. AQI up 41 in the last 6 hours — air quality is degrading. With UV 0.2 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 22 by mid-afternoon.
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 91 now. With UV 0.2 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 22 by mid-afternoon.
- Present
- AQI 91
- UV peak
- 0.2 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 22
PM × Wind × Precip
PM2.5 at 6.2 µg/m³, PM10 at 7.9 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.78
- Wind
- breezy
- Recent rain
- 0h 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).
The higher the clouds, the finer the weather.
- Moonrise
- 2:49 AM
- Moonset
- 12:00 PM
- In sign
- ♑︎ Capricorn
Fireflies rise from the lawn
Greenwich at a glance
- Today vs. normal: 74°F — typical for the season
- Last frost: April 12 (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 3, 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.