Weather WorldUnion Lake, NJ Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Union Lake Weather Forecast
| TODAY | TONIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT |
 |  |  |  |  |  | |  | | |  | |
| Chance of T-Storm | Chance of T-Storm | Chance of Showers | Partly Cloudy | Sunny | Mostly Clear | Sunny | Chance of Showers | Chance of T-Storm | Chance of T-Storm | Chance of Showers | Chance of Showers |
| Hi: 81°FHi: 27°C | Lo: 70°FLo: 21°C | Hi: 89°FHi: 32°C | Lo: 70°FLo: 21°C | Hi: 89°FHi: 32°C | Lo: 69°FLo: 21°C | Hi: 89°FHi: 32°C | Lo: 71°FLo: 22°C | Hi: 85°FHi: 29°C | Lo: 65°FLo: 18°C | Hi: 81°FHi: 27°C | Lo: 65°FLo: 18°C |
| POP: 70% | POP: 90% | POP: 50% | POP: 40% | POP: 50% | POP: 50% | POP: 30% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 400 AM EDT Sun Aug 16 2026 
Union Lake Radar Loop
Use the map search tool if you want to place a location marker on the radar map...
Union Lake Weather Map
Union Lake Quick Facts
Union Lake Forecast Discussion
Issued: 354 PM EDT Sun Aug 16 2026
Key Messages
1. A frontal system passes through the region later today and tonight producing widespread showers with localized flash flooding.
2. A trailing mid-level short wave trough and weak cold front lead to the potential for additional rounds of showers and thunderstorms on Monday.
3. A cold front is expected to cross through the region Wednesday night into Thursday resulting in more shower and thunderstorm chances.
Discussion
... KEY MESSAGE 1...A frontal system p...