Norwalk, Connecticut Weather
Fireflies rise from the lawn. Day 78 of spring. Read this microseason across nine climate regions →
Norwalk weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 5Overcast——90°60°—
- SaturdayJun 6Showers50%0.04″92°60°+2°
- SundayJun 7Showers50%0.28″80°63°-12°
- MondayJun 8Partly Cloudy——77°54°-3°
- TuesdayJun 9Overcast——83°62°+6°
- WednesdayJun 10Partly Cloudy12%—82°66°-1°
- ThursdayJun 11Overcast23%—79°67°-3°
AQI 50 (Good), driven by PM2.5. AQI down 29 over the last 6 hours — air quality is improving sharply. PM2.5 at 18.5 µg/m³ (AQI 69) with a 0.92 fine-to-coarse ratio and 2 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.
What's driving it
PM × Wind × Precip
PM2.5 at 18.5 µg/m³ (AQI 69) with a 0.92 fine-to-coarse ratio and 2 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.92
- 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).
The higher the clouds, the finer the weather.
- Moonrise
- 3:55 AM
- Moonset
- 1:55 PM
- In sign
- ♒︎ Aquarius
Fireflies rise from the lawn
Norwalk at a glance
- Today vs. normal: 11°F below the seasonal normal for this latitude
- Last frost: April 23 (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 — Norwalk
SPC has placed Norwalk 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.