West Dennis, Massachusetts Weather
Fireflies rise from the lawn. Day 78 of spring. Read this microseason across nine climate regions →
West Dennis weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 5Overcast——78°57°—
- SaturdayJun 6Drizzle16%—69°59°-9°
- SundayJun 7Showers60%0.17″70°55°+1°
- MondayJun 8Overcast21%—66°54°-4°
- TuesdayJun 9Overcast——75°59°+9°
- WednesdayJun 10Overcast——76°63°+1°
- ThursdayJun 11Overcast15%—70°62°-6°
AQI 48 (Good), driven by PM2.5. AQI down 12 over the last 6 hours (steady decline since this morning). PM2.5/PM10 ratio 0.65 with 10 mph wind — characteristic of long-range haze transport rather than a local source.
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 47. Overcast through the UV peak window (cloud cover ~84%) — afternoon ozone should stay flat.
- Present
- AQI 47
- UV peak
- 3.3 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 10
PM × Wind × Precip
PM2.5/PM10 ratio 0.65 with 10 mph wind — characteristic of long-range haze transport rather than a local source.
- PM2.5/PM10
- 0.65
- Wind
- breezy
- 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).
The higher the clouds, the finer the weather.
- Moonrise
- 3:44 AM
- Moonset
- 1:40 PM
- In sign
- ♒︎ Aquarius
Fireflies rise from the lawn
West Dennis at a glance
- Today vs. normal: 15°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 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 — West Dennis
SPC has placed West Dennis in the Marginal Risk category for severe thunderstorms day after tomorrow.
- TODAYNONENo severe risk
- TOMORROWNONENo severe risk
- DAY 3MRGLMarginal Risk
Isolated severe storms possible. Limited threat for hail or damaging wind.
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.