Harwich Center, Massachusetts Weather
Cicadas claim the afternoon. Day 15 of summer. Read this microseason across nine climate regions →
Harwich Center weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Heavy Drizzle79%0.06″79°67°—
- MondayJul 6Light Drizzle65%0.02″76°64°-3°
- TuesdayJul 7Light Showers79%0.53″68°61°-8°
- WednesdayJul 8Light Drizzle21%0.02″70°62°+2°
- ThursdayJul 9Overcast——81°63°+11°
- FridayJul 10Light Drizzle19%0.01″82°69°+1°
- SaturdayJul 11Overcast16%—76°66°-6°
AQI 51 (Moderate), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 20.1 µg/m³ (AQI 71) with a 0.82 fine-to-coarse ratio and 2 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 during the projected peak around 7 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 36. Overcast through the UV peak window (cloud cover ~76%) — afternoon ozone should stay flat.
- Present
- AQI 36
- UV peak
- 2.0 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 5
PM × Wind × Precip
PM2.5 at 20.1 µg/m³ (AQI 71) with a 0.82 fine-to-coarse ratio and 2 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.82
- Wind
- calm
- 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
- 10:48 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Harwich Center at a glance
- Today vs. normal: 72°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.
16-Day Forecast — Harwich Center
- Sun79°67°79%
- Mon76°64°65%
- Tue68°61°79%
- Wed70°62°21%
- Thu81°63°5%
- Fri82°69°19%
- Sat76°66°16%
- Sun66°61°16%
- Mon69°60°18%
- Tue76°58°19%
- Wed80°69°16%
- Thu81°67°23%
- Fri84°65°19%
- Sat82°71°40%
- Sun81°69°24%
- Mon83°70°32%
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 — Harwich Center
SPC includes Harwich Center 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 Harwich Center
- 02645