South Lancaster, Massachusetts Weather
Cicadas claim the afternoon. Day 15 of summer. Read this microseason across nine climate regions →
South Lancaster weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast——87°65°—
- MondayJul 6Drizzle66%0.03″81°63°-6°
- TuesdayJul 7Light Rain78%0.30″64°59°-17°
- WednesdayJul 8Overcast23%—77°57°+13°
- ThursdayJul 9Overcast12%—83°57°+6°
- FridayJul 10Light Drizzle34%0.02″83°66°0°
- SaturdayJul 11Overcast21%—83°54°0°
AQI 27 (Good), driven by PM2.5. AQI down 13 over the last 6 hours (gradual decline). PM2.5 at 7.4 µg/m³ (AQI 41) with a 0.99 fine-to-coarse ratio and 3 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 4 PM.
What's driving it
PM × Wind × Precip
PM2.5 at 7.4 µg/m³ (AQI 41) with a 0.99 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.99
- 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
- 11:05 PM
- Moonset
- 10:55 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
South Lancaster at a glance
- Today vs. normal: 4°F below the seasonal normal for this latitude
- Last frost: May 1 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 01561
15-Day Forecast — South Lancaster
- Sun87°65°5%
- Mon81°63°66%
- Tue64°59°78%
- Wed77°57°23%
- Thu83°57°12%
- Fri83°66°34%
- Sat83°54°21%
- Sun81°58°16%
- Mon63°55°19%
- Tue85°53°20%
- Wed84°61°16%
- Thu89°59°26%
- Fri89°67°22%
- Sat84°67°34%
- Sun91°64°34%
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 — South Lancaster
SPC includes South Lancaster in the general thunderstorm area tomorrow — no severe risk, but storms are possible.
- TODAYNONENo severe risk
- 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 South Lancaster
- 01523
- 01561