South Ashburnham, Massachusetts Weather
Fireflies rise from the lawn. Day 78 of spring. Read this microseason across nine climate regions →
South Ashburnham weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 5Overcast——80°53°—
- SaturdayJun 6Rain46%0.38″82°62°+2°
- SundayJun 7Drizzle60%—74°53°-8°
- MondayJun 8Overcast16%—77°46°+3°
- TuesdayJun 9Overcast——80°52°+3°
- WednesdayJun 10Overcast——86°57°+6°
- ThursdayJun 11Mostly Clear20%—83°56°-3°
AQI 38 (Good), driven by Ozone. AQI down 5 over the last 6 hours (steady decline since this morning). Ozone at AQI 38. Overcast through the UV peak window (cloud cover ~60%) — afternoon ozone should stay flat.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 5 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 38. Overcast through the UV peak window (cloud cover ~60%) — afternoon ozone should stay flat.
- Present
- AQI 38
- UV peak
- 2.0 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 5
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
- 3:54 AM
- Moonset
- 1:45 PM
- In sign
- ♒︎ Aquarius
Fireflies rise from the lawn
South Ashburnham at a glance
- Today vs. normal: 13°F below the seasonal normal for this latitude
- Last frost: May 2 (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 — South Ashburnham
SPC has placed South Ashburnham in the Slight Risk category for severe thunderstorms tomorrow.
- TODAYNONENo severe risk
- TOMORROWSLGTSlight Risk
- DAY 3TSTMGeneral Thunderstorms
Scattered severe storms possible. A few tornadoes, hail, and damaging wind gusts possible.
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.