Today | Weather | Tuesday, July 21, 2026

Active Weather Warnings

Flood Watch

Weather in Jersey City, New Jersey

05:01 AM

Now

72° F

Feels Like 72°

Precipitation 6 %

Wind 7 mph

Humidity 77 %

Today

Day 81°

Night 73°

Precipitation 99 %

Wind 10 mph

UV Index (0 - 11+) 2

Jersey City Weather Forecast Updated

25 minutes ago

Last updated on July 21, 2026 at 4:36 AM

Weather Forecast History

Last Year's Weather on This Day (July 21, 2025)

Day

88°

Night

66°

Wind

7 mph

Precipitation

1 %

Air Quality in Jersey City

NOW

58 AQI

Moderate air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 10.13 µg/m³

PM₁₀ 14.72 µg/m³

O₃ 0.057 ppm

NO₂ 0.7 ppb

SO₂ 0.3 ppb

CO 0.31 ppm

NH₃ 0.06 µg/m³

NO 0 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 acceptable; however, for some pollutants, there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.

Show raw pollutant concentrations (µg/m³)

PM_2.5 – 10.13 µg/m³

PM₁₀ – 14.72 µg/m³

O₃ – 110.99 µg/m³

NO₂ – 1.37 µg/m³

SO₂ – 0.88 µg/m³

CO – 357.43 µg/m³

NH₃ – 0.06 µg/m³

NO – 0 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Jersey City

Severe Future Possible

Flood Watch

Flood Watch issued July 21 at 2:43AM EDT until July 22 at 2:00AM EDT by NWS Upton NY

Jul 21, 8:00 AM → Jul 22, 2:00 AM

WHAT: Flooding caused by excessive rainfall continues to be
possible.

WHERE: Portions of northeast New Jersey, including the following
areas, Eastern Bergen, Eastern Essex, Eastern Passaic, Eastern
Union, Hudson, Western Bergen, Western Essex, Western Passaic and
Western Union and southeast New York, including the following
areas, Bronx, Kings (Brooklyn), New York (Manhattan), Northern
Queens, Richmond (Staten Island) and Southern Queens.

WHEN: From 8 AM EDT this morning through late tonight.

IMPACTS: Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Flooding may occur in poor drainage and urban areas.

ADDITIONAL DETAILS:
- Multiple rounds of showers and thunderstorms are expected
this morning through tonight. Average rainfall totals will be
between 1 and 2 inches, with isolated totals around 3 to 4
inches possible. Peak rainfall rates in the strongest storms
could be near 2.5 inches per hour.
- http://www.weather.gov/safety/flood

+ Read More

You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.

Updated: Jul 21, 4:36 AM Source: NWS Alert