Today | Weather | Wednesday, March 18, 2026
Active Weather Warnings

Weather in Indianapolis, Indiana

03:59 AM
Now
Snowy Weather
23° F
Feels Like 12°
Precipitation 61 %
Wind 9 mph
Humidity 63 %
Today
Snowy Weather
Day 48°
Night 34°
Precipitation 55 %
Wind 12 mph
UV Index (0 - 11+) 2
Overnight Frost 3 AM – 3 AM

Indianapolis Weather Forecast Updated

25 minutes ago
Last updated on

Air Quality in Indianapolis

NOW
47 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.84 µg/m³
PM10 4.92 µg/m³
O3 0.051 ppm
NO2 2.1 ppb
SO2 3.2 ppb
CO 0.14 ppm
NH3 0.99 µg/m³
NO 0 µg/m³
PM2.5 – 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)
PM2.53.84 µg/m³
PM104.92 µg/m³
O3100.29 µg/m³
NO24.02 µg/m³
SO28.27 µg/m³
CO161.54 µg/m³
NH30.99 µg/m³
NO0 µg/m³

Weather Alerts and Warnings for Indianapolis

Moderate Expected Observed

Special Weather Statement

Special Weather Statement issued March 17 at 9:33PM EDT by NWS Indianapolis IN
Mar 17, 9:33 PM Mar 18, 5:45 AM
Light snow will develop after midnight in western portions of
central Indiana reaching the remainder of central Indiana in the
pre-dawn hours of Wednesday morning.

The snow will continue into the morning rush hour before gradually
ending by noon. If traveling, exercise caution and be prepared
for slick spots on roads; especially bridges, overpasses, and
untreated surfaces.

Total snow accumulations from a few tenths up to 1 inch are
expected, with the highest amounts expected generally north of
I-70.
Updated: Mar 18, 3:34 AM Source: NWS Alert