Today | Weather | Tuesday, October 13, 2026

Active Weather Warnings

Coastal Flood Statement

Weather in Norwalk, Connecticut

12:21 AM

Now

57° F

Feels Like 57°

Precipitation 0 %

Wind 5 mph

Humidity 93 %

Today

Day 70°

Night 63°

Precipitation 25 %

Wind 8 mph

UV Index (0 - 11+) 4

Norwalk Weather Forecast Updated

Weather Forecast History

Last Year's Weather on This Day (October 13, 2025)

Day

57°

Night

54°

Wind

20 mph

Precipitation

91 %

Air Quality in Norwalk

NOW

19 AQI

Good air quality Dominant pollutant: PM_2.5

Pollutant Concentrations:

PM_2.5 4.57 µg/m³

PM₁₀ 7.52 µg/m³

O₃ 0.016 ppm

NO₂ 11.2 ppb

SO₂ 0.5 ppb

CO 0.20 ppm

NH₃ 0.24 µg/m³

NO 0.01 µg/m³

PM_2.5 – Fine particles <2.5μm

PM₁₀ – Inhalable particles <10μm

O₃ – Ozone

NO₂ – Nitrogen dioxide

SO₂ – Sulfur dioxide

CO – Carbon monoxide

NH₃ – Ammonia

NO – Nitric oxide

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

Show raw pollutant concentrations (µg/m³)

PM_2.5 – 4.57 µg/m³

PM₁₀ – 7.52 µg/m³

O₃ – 30.93 µg/m³

NO₂ – 21.08 µg/m³

SO₂ – 1.44 µg/m³

CO – 233.05 µg/m³

NH₃ – 0.24 µg/m³

NO – 0.01 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Norwalk

Minor Expected Likely

Coastal Flood Statement

Coastal Flood Statement issued October 12 at 2:53PM EDT until October 13 at 3:00PM EDT by NWS Upton NY

Oct 13, 12:00 PM → Oct 13, 3:00 PM

WHAT: Up to one half foot of inundation above ground level
expected in vulnerable areas near the waterfront and shoreline.

WHERE: Southern Fairfield County.

WHEN: Tuesday afternoon.

IMPACTS: Brief minor flooding of the more vulnerable
locations near the waterfront and shoreline.

+ Read More

Do not drive through flooded roadways.

Updated: Oct 12, 6:40 PM Source: NWS Alert