Northwest Harwich, Massachusetts Weather
Fireflies rise from the lawn. Day 76 of spring. Read this microseason across nine climate regions →
Northwest Harwich weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Partly Cloudy——75°47°—
- ThursdayJun 4Overcast——72°53°-3°
- FridayJun 5Overcast——78°54°+6°
- SaturdayJun 6Light Drizzle16%—80°61°+2°
- SundayJun 7Light Drizzle58%0.01″73°52°-7°
- MondayJun 8Partly Cloudy31%—62°52°-11°
- TuesdayJun 9Partly Cloudy18%—66°51°+4°
PM2.5 at 17.2 µg/m³, PM10 at 21.8 µg/m³ — typical background levels with no transport signature. AQI up 12 over the last 6 hours (gradual rise).
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 63 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 63
- UV peak
- 0.6 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 63
PM × Wind × Precip
PM2.5 at 17.2 µg/m³, PM10 at 21.8 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.79
- 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
- 2:37 AM
- Moonset
- 11:29 AM
- In sign
- ♑︎ Capricorn
Fireflies rise from the lawn
Northwest Harwich at a glance
- Today vs. normal: 9°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 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.