Quincy, Massachusetts Weather
Fireflies rise from the lawn. Day 77 of spring. Read this microseason across nine climate regions →
Quincy weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast——88°57°—
- FridayJun 5Overcast——89°63°+1°
- SaturdayJun 6Heavy Showers25%0.41″89°65°0°
- SundayJun 7Light Showers76%0.11″81°56°-8°
- MondayJun 8Light Showers25%0.14″60°51°-21°
- TuesdayJun 9Partly Cloudy——66°51°+6°
- WednesdayJun 10Clear——69°57°+3°
Ozone at AQI 500 now. AQI flat over the last 6 hours (within ±3 points). With UV 8.3 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 552 by mid-afternoon.
AVOID OUTDOORS Avoid outdoor exertion. Keep windows closed; use HEPA filtration indoors if available.
What's driving it
Ozone × UV × Sky
Ozone at AQI 500 now. With UV 8.3 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 552 by mid-afternoon.
- Present
- AQI 500
- UV peak
- 8.3 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 552
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
- 3:19 AM
- Moonset
- 12:35 PM
- In sign
- ♒︎ Aquarius
Fireflies rise from the lawn
Quincy at a glance
- Today vs. normal: 14°F above the seasonal normal for this latitude
- Last frost: April 30 (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 — Quincy
SPC has placed Quincy 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.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | — | — |
| February | — | — |
| March | — | — |
| April | — | — |
| May | lettuce, peas, spinach, radishes | lettuce, peas, radishes |
| June | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| July | tomatoes, peppers, beans, squash | tomatoes, beans, summer squash |
| August | tomatoes, peppers, beans, squash, fall brassicas, garlic (overwinter), carrots | tomatoes, beans, summer squash |
| September | fall brassicas, garlic (overwinter), carrots | tomatoes, beans, summer squash |
| October | — | winter squash, tomatoes (last) |
| November | — | — |
| December | — | — |
A year in weather
Quincy's warmest month is July (~74°F mean) and its coldest is January (~28°F). Rainfall peaks in December (5.1 inches) and bottoms out in July (3.5 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 28° | 3.9″ | 13 |
| February | 30° | 3.6″ | 12 |
| March | 38° | 4.5″ | 15 |
| April | 49° | 4.3″ | 14 |
| May | 59° | 3.6″ | 12 |
| June | 68° | 4.2″ | 14 |
| July | 74° | 3.5″ | 12 |
| August | 73° | 3.7″ | 12 |
| September | 65° | 4.0″ | 13 |
| October | 53° | 5.0″ | 17 |
| November | 43° | 4.0″ | 13 |
| December | 34° | 5.1″ | 17 |
Regional context
Quincy sits within a warm-summer humid continental climate region — a cohort that shares similar temperature ranges, seasonal patterns, and growing conditions across nearby cities.
Similar climates: Boston, MA, Worcester, MA, Springfield, MA, New Bedford, MA, Cambridge, MA.
Frequently asked
- When does it freeze in Quincy?
- Quincy's last spring frost typically falls around mid-May, and the first fall frost arrives around mid-October.
- What is the rainy season in Quincy?
- December is the wettest month with about 5.1 inches of rain on average; the city receives roughly 49 inches annually.
- What is the warmest month in Quincy?
- July is typically warmest, averaging about 74°F.
- What is the coldest month in Quincy?
- January is typically coldest, averaging about 28°F.
- When can I start a vegetable garden in Quincy?
- Cool-season crops (peas, lettuce) can be sown around the last spring frost (mid-May); warm-season crops (tomatoes, peppers) wait until 1–2 weeks after.
- How many rainy days does Quincy get?
- Quincy averages about 164 rainy days per year.
- What hardiness zone is Quincy?
- Quincy's USDA hardiness zone is determined by its lowest average winter temperature; check the USDA's online lookup with the city ZIP for the current zone designation.
Climate
Quincy, Massachusetts sits in a warm-summer humid continental climate zone. January means hover near 28°F while July averages 74°F — a 46°F seasonal swing.
Across the year, Quincy receives about 49 inches of precipitation spread over roughly 164 rainy days.
The rhythm of the year is set by latitude (42.3°N), proximity to large water bodies, and elevation — all of which shape what grows here, when frost is likely, and what the weather story looks like day to day.