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Union County weather

Live local weather, warnings, forecast timing, wind, humidity, and weather alerts that may affect your day.

Right now

72°F
Partly Cloudy

Partly Cloudy

Warnings2 active NWS alerts
Wind2 mph SW
Humidity100%
Feels like73°F
Dew point72°F
Pressure30.01 inHg
Visibility10.0 mi
SourceNational Weather Service

Hourly forecast

Tap an hour for more detail
4 AM 75°F

Mostly Cloudy

Wind: 2 mph SW Rain chance: 2%
5 AM 74°F

Mostly Cloudy

Wind: 3 mph SW Rain chance: 2%
6 AM 74°F

Partly Sunny

Wind: 3 mph SW Rain chance: 2%
7 AM 73°F

Partly Sunny

Wind: 3 mph SW Rain chance: 2%
8 AM 75°F

Partly Sunny

Wind: 5 mph SW Rain chance: 4%
9 AM 78°F

Mostly Sunny

Wind: 6 mph W Rain chance: 4%
10 AM 82°F

Mostly Sunny

Wind: 7 mph W Rain chance: 4%
11 AM 84°F

Mostly Sunny

Wind: 8 mph W Rain chance: 11%
12 PM 87°F

Mostly Sunny

Wind: 8 mph W Rain chance: 11%
1 PM 88°F

Mostly Sunny

Wind: 9 mph W Rain chance: 11%
2 PM 89°F

Slight Chance Showers And Thunderstorms

Wind: 9 mph SW Rain chance: 21%
3 PM 90°F

Slight Chance Showers And Thunderstorms

Wind: 10 mph W Rain chance: 21%
4 PM 89°F

Slight Chance Showers And Thunderstorms

Wind: 10 mph W Rain chance: 21%
5 PM 88°F

Slight Chance Showers And Thunderstorms

Wind: 9 mph W Rain chance: 23%
6 PM 87°F

Slight Chance Showers And Thunderstorms

Wind: 8 mph SW Rain chance: 23%
7 PM 85°F

Slight Chance Showers And Thunderstorms

Wind: 7 mph W Rain chance: 23%
8 PM 83°F

Slight Chance Showers And Thunderstorms

Wind: 5 mph SW Rain chance: 20%
9 PM 81°F

Slight Chance Showers And Thunderstorms

Wind: 5 mph SW Rain chance: 20%

Daily outlook

Tap a day for details
Overnight 73°F

Mostly Cloudy

Mostly cloudy, with a low around 73. Southwest wind around 3 mph.

Wind: 3 mph SW
Saturday 91°F

Mostly Sunny then Slight Chance Showers And Thunderstorms

A slight chance of showers and thunderstorms after 2pm. Mostly sunny. High near 91, with temperatures falling to around 88 in the afternoon. Heat index values as high as 99. Southwest wind 3 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.

Wind: 3 to 10 mph SW
Saturday Night 73°F

Slight Chance Showers And Thunderstorms

A slight chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 73. Southwest wind 3 to 8 mph. Chance of precipitation is 20%.

Wind: 3 to 8 mph SW
Sunday 91°F

Mostly Sunny

Mostly sunny. High near 91, with temperatures falling to around 89 in the afternoon. Heat index values as high as 96. West wind 3 to 9 mph.

Wind: 3 to 9 mph W
Sunday Night 71°F

Mostly Clear

Mostly clear, with a low around 71. Northwest wind 1 to 7 mph.

Wind: 1 to 7 mph NW
Monday 92°F

Sunny

Sunny, with a high near 92.

Wind: 0 to 8 mph W
Monday Night 74°F

Partly Cloudy

Partly cloudy, with a low around 74.

Wind: 7 mph W
Tuesday 90°F

Mostly Sunny then Chance Showers And Thunderstorms

A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 90. Chance of precipitation is 40%.

Wind: 5 to 9 mph W
Tuesday Night 71°F

Chance Showers And Thunderstorms

A chance of showers and thunderstorms before 8pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 71. Chance of precipitation is 40%.

Wind: 3 to 8 mph W
Wednesday 87°F

Slight Chance Rain Showers

A slight chance of rain showers. Partly sunny, with a high near 87.

Wind: 3 to 7 mph NW

Official NWS alerts

Union County
Moderate Heat Advisory Western Passaic; Eastern Passaic; Hudson; Western Bergen; Eastern Bergen; Western Essex; Eastern Essex; Western Union; Eastern Union

Heat Advisory issued August 8 at 12:58AM EDT until August 8 at 8:00PM EDT by NWS Upton NY

* WHAT...Heat index values up to 96.

* WHERE...Eastern Bergen, Eastern Essex, Eastern Passaic, Eastern
Union, Hudson, Western Bergen, Western Essex, Western Passaic, and
Western Union Counties.

* WHEN...Until 8 PM EDT this evening.

* IMPACTS...Hot temperatures and high humidity may cause heat
illnesses.

Instructions: A Heat Advisory is issued when the combination of heat and humidity
is expected to make it feel like it is 95 to 99 degrees for two or
more consecutive days, or 100 to 104 degrees for any length of time.

Seniors and those with chronic health problems or mental health
conditions are at an increased risk. Homes without air conditioning
can be much hotter than outdoor temperatures.

Use air conditioning to stay cool at home or go to a place that has
air conditioning. If you don't have home air conditioning, continue
to seek out cool spaces each day as long as it remains hot, and for a
few days after if your home is still hot. Check on vulnerable
friends, family members and neighbors.

To reduce risk during outdoor work, the Occupational Safety and
Health Administration recommends scheduling frequent rest breaks in
shaded or air conditioned environments. Anyone overcome by heat
should be moved to a cool and shaded location. Heat stroke is an
emergency! In cases of heat stroke call 9 1 1.

Effective 2026-08-08T00:58:00-04:00 - Expires 2026-08-08T09:00:00-04:00
Unknown Air Quality Alert Eastern Passaic; Hudson; Western Bergen; Eastern Bergen; Western Essex; Eastern Essex; Western Union; Eastern Union

Air Quality Alert issued August 7 at 11:26PM EDT by NWS Upton NY

The New Jersey Department of Environmental Protection has issued an
Air Quality Action Day for the following counties:

Bergen, Passaic, Hudson, Essex, Union.

from 11 AM to 11 PM EDT Saturday.

An Air Quality Action Day means that Ground Level Ozone within the
region may approach or exceed unhealthy standards.

For additional information, please visit the New Jersey Department
of Environmental Protection Web site at https://dep.nj.gov/airmon

Effective 2026-08-07T23:26:00-04:00 - Expires 2026-08-08T23:00:00-04:00

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