Today | Weather | Saturday, September 19, 2026
Active Weather Warnings

Weather in South Bend, Indiana

01:41 AM
Now
Cloudy Night
64° F
Feels Like 63°
Precipitation 20 %
Wind 7 mph
Humidity 78 %
Today
Rainy Weather
Day 72°
Night 64°
Precipitation 99 %
Wind 8 mph
UV Index (0 - 11+) 1

South Bend Weather Forecast Updated

49 seconds ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (September 19, 2025)
Cloudy Night

Day

90°

Night

63°

Wind

7 mph

Precipitation

6 %

Air Quality in South Bend

NOW
34 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 6.8 µg/m³
PM10 7.61 µg/m³
O3 0.037 ppm
NO2 1.6 ppb
SO2 0.3 ppb
CO 0.15 ppm
NH3 0.91 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)
PM2.56.8 µg/m³
PM107.61 µg/m³
O372.07 µg/m³
NO22.92 µg/m³
SO20.72 µg/m³
CO171.53 µg/m³
NH30.91 µg/m³
NO0 µg/m³

Weather Alerts and Warnings for South Bend

Severe Future Possible

Flood Watch

Flood Watch issued September 18 at 9:06PM EDT until September 20 at 8:00AM EDT by NWS Northern Indiana
Sep 19, 2:00 AM Sep 20, 8:00 AM
WHAT: Flash flooding caused by excessive rainfall continues to be
possible.

WHERE: Portions of northern Indiana, including the following
areas, Adams, Allen IN, Blackford, De Kalb, Eastern St. Joseph IN,
Elkhart, Fulton IN, Grant, Huntington, Jay, Lagrange, Marshall,
Miami, Noble, Northern Kosciusko, Northern La Porte, Southern
Kosciusko, Southern La Porte, Starke, Steuben, Wabash, Wells,
Western St. Joseph IN and Whitley, southwest Michigan, including
the following areas, Branch, Cass MI, Northern Berrien, Southern
Berrien and St. Joseph MI, and northwest Ohio, including the
following areas, Paulding and Van Wert.

WHEN: From 2 AM EDT /1 AM CDT/ Saturday through Sunday morning.

IMPACTS: Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Creeks and streams may rise out of their banks. Flooding may occur
in poor drainage and urban areas. Low-water crossings may be
flooded.

ADDITIONAL DETAILS:
- 1 to 2 inches of rain is likely area-wide, with locally higher
amounts of up to 3 inches possible mainly along and north of
I-80/I-90.
- http://www.weather.gov/safety/flood
+ Read More
You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.
Updated: Sep 19, 1:40 AM Source: NWS Alert