West Chatham, Massachusetts Weather
Fireflies rise from the lawn. Day 77 of spring. Read this microseason across nine climate regions →
West Chatham weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast——67°56°—
- FridayJun 5Overcast——69°56°+2°
- SaturdayJun 6Overcast18%—81°61°+12°
- SundayJun 7Heavy Drizzle55%0.02″77°53°-4°
- MondayJun 8Light Drizzle23%0.01″62°52°-15°
- TuesdayJun 9Overcast13%—60°54°-2°
- WednesdayJun 10Overcast——59°52°-1°
Ozone at AQI 58 now. AQI up 25 in the last 6 hours — air quality is degrading. With UV 3.3 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 26 by mid-afternoon.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 8 AM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 58 now. With UV 3.3 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 26 by mid-afternoon.
- Present
- AQI 58
- UV peak
- 3.3 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 26
PM × Wind × Precip
PM2.5/PM10 ratio 0.70 with 8 mph wind — characteristic of long-range haze transport rather than a local source.
- PM2.5/PM10
- 0.70
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- transport
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).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 3:12 AM
- Moonset
- 12:33 PM
- In sign
- ♑︎ Capricorn
Fireflies rise from the lawn
West Chatham at a glance
- Today vs. normal: 17°F below the seasonal normal for this latitude
- Last frost: April 26 (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 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.