Siasconset, Massachusetts Weather
Fireflies rise from the lawn. Day 77 of spring. Read this microseason across nine climate regions →
Siasconset weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Mostly Clear——70°54°—
- FridayJun 5Overcast——77°56°+7°
- SaturdayJun 6Overcast28%—70°58°-7°
- SundayJun 7Light Showers61%0.16″63°55°-7°
- MondayJun 8Drizzle30%0.07″56°53°-7°
- TuesdayJun 9Overcast——61°56°+5°
- WednesdayJun 10Clear15%—62°60°+1°
PM2.5/PM10 ratio 0.64 with 14 mph wind — characteristic of long-range haze transport rather than a local source. AQI flat over the last 6 hours (within ±3 points).
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 48 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 48
- UV peak
- 3.1 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 48
PM × Wind × Precip
PM2.5/PM10 ratio 0.64 with 14 mph wind — characteristic of long-range haze transport rather than a local source.
- PM2.5/PM10
- 0.64
- 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).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 3:11 AM
- Moonset
- 12:34 PM
- In sign
- ♒︎ Aquarius
Fireflies rise from the lawn
Siasconset at a glance
- Today vs. normal: 6°F below the seasonal normal for this latitude
- Last frost: April 24 (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.
SPC Convective Outlook
Storm Prediction Center — Siasconset
SPC has placed Siasconset in the General Thunderstorms category for severe thunderstorms day after tomorrow.
- TODAYNONENo severe risk
- TOMORROWNONENo severe risk
- DAY 3TSTMGeneral Thunderstorms
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.