Northwest Harwich, Massachusetts Weather
Cicadas claim the afternoon. Day 15 of summer. Read this microseason across nine climate regions →
Northwest Harwich weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Heavy Drizzle78%0.05″79°67°—
- MondayJul 6Light Drizzle66%0.02″76°64°-3°
- TuesdayJul 7Heavy Drizzle79%0.16″66°61°-10°
- WednesdayJul 8Overcast21%—66°59°0°
- ThursdayJul 9Overcast——72°62°+6°
- FridayJul 10Light Drizzle19%—86°66°+14°
- SaturdayJul 11Overcast15%—75°64°-11°
AQI 41 (Good), driven by PM2.5. AQI down 60 over the last 6 hours — air quality is improving sharply. PM2.5 at 12.1 µg/m³ (AQI 57) with a 0.79 fine-to-coarse ratio and 6 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 33. Overcast through the UV peak window (cloud cover ~74%) — afternoon ozone should stay flat.
- Present
- AQI 33
- UV peak
- 0.3 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 4
PM × Wind × Precip
PM2.5 at 12.1 µg/m³ (AQI 57) with a 0.79 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.79
- 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
- 10:58 PM
- Moonset
- 10:49 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Northwest Harwich at a glance
- Today vs. normal: 71°F — typical for the season
- Last frost: April 26 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
15-Day Forecast — Northwest Harwich
- Sun79°67°78%
- Mon76°64°66%
- Tue66°61°79%
- Wed66°59°21%
- Thu72°62°6%
- Fri86°66°19%
- Sat75°64°15%
- Sun77°63°16%
- Mon76°63°18%
- Tue74°64°19%
- Wed77°64°16%
- Thu79°65°23%
- Fri83°72°19%
- Sat81°69°40%
- Sun82°69°24%
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 — Northwest Harwich
SPC includes Northwest Harwich in the general thunderstorm area today — no severe risk, but storms are possible.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3NONENo severe risk
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
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 Northwest Harwich
- 02671
- 02645
- 02646