National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Severe Thunderstorms and Heat Impact July 4th Weekend

A threat for severe thunderstorms will impact the July 4th weekend, bringing the potential for damaging wind gusts and localized flash flooding through Sunday. Hazardous heat continues into Sunday as well. Read More >

Hazardous Weather Conditions

Current conditions at

Caldwell, Essex County Airport (KCDW)

Lat: 40.88°NLon: 74.28°WElev: 171ft.

Partly Cloudy

77°F

25°C

Humidity 74%
Wind Speed Vrbl 6 mph
Barometer 29.91 in (1013.0 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 4 Jul 9:53 pm EDT
Extended Forecast for

Lake Hiawatha NJ

  • Tonight

    Tonight: Showers and possibly a thunderstorm before 2am, then a chance of showers between 2am and 3am. Some of the storms could be severe. Low around 71. Calm wind. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 71 °F

    Severe
    Thunderstorms
    then Showers
    Likely

  • Sunday

    Sunday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 3pm. Partly sunny, with a high near 84. Calm wind becoming east around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 84 °F

    Partly Sunny
    then Showers
    Likely

  • Sunday Night

    Sunday Night: Showers and thunderstorms, mainly before midnight, then showers and possibly a thunderstorm after 1am. Low around 67. East wind around 5 mph becoming calm. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 67 °F

    Showers

  • Monday

    Monday: Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 75. East wind 5 to 10 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.

    High: 75 °F

    Heavy Rain

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm. Low around 63. East wind around 5 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 63 °F

    Showers

  • Tuesday

    Tuesday: Showers likely and possibly a thunderstorm before 11am, then showers likely between 11am and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 78. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 78 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 61. Chance of precipitation is 30%.

    Low: 61 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 83.

    High: 83 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 65.

    Low: 65 °F

    Partly Cloudy

Detailed Forecast

Tonight
Showers and possibly a thunderstorm before 2am, then a chance of showers between 2am and 3am. Some of the storms could be severe. Low around 71. Calm wind. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 3pm. Partly sunny, with a high near 84. Calm wind becoming east around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
Showers and thunderstorms, mainly before midnight, then showers and possibly a thunderstorm after 1am. Low around 67. East wind around 5 mph becoming calm. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Monday
Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 75. East wind 5 to 10 mph. Chance of precipitation is 100%. New rainfall amounts between 1 and 2 inches possible.
Monday Night
Showers and possibly a thunderstorm. Low around 63. East wind around 5 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Tuesday
Showers likely and possibly a thunderstorm before 11am, then showers likely between 11am and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 78. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
A chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 61. Chance of precipitation is 30%.
Wednesday
Mostly sunny, with a high near 83.
Wednesday Night
Partly cloudy, with a low around 65.
Thursday
Mostly sunny, with a high near 89.
Thursday Night
Partly cloudy, with a low around 69.
Friday
Showers likely and possibly a thunderstorm. Mostly sunny, with a high near 89. Chance of precipitation is 60%.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 68. Chance of precipitation is 60%.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 87. Chance of precipitation is 30%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lake Hiawatha NJ
 40.87°N 74.36°W (Elev. 194 ft)
Last Update:
6:07 pm EDT Jul 4, 2026
Forecast Valid:
10pm EDT Jul 4, 2026-6pm EDT Jul 11, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation