Union City, New Jersey Weather
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Climate of Union City: monthly averages
Based on 25 years of satellite and reanalysis data (2001-2025), July is usually the hottest month in Union City, with average daytime highs around 29°C. January is the coolest, when nights typically fall to about -6°C and frost is possible on the coldest nights. That is a wide yearly range of roughly 35°C, so the seasons feel very different from each other.
The area receives about 1240 mm of rain in a typical year. Most of it falls from March to April, June to October and December (around 72% of the yearly total), and October is the wettest month at roughly 122 mm.
For outdoor plans and travel, May usually offers the most comfortable weather in Union City, with mild days and relatively little rain.
| Month | Avg high | Avg low | Rainfall | Humidity |
|---|---|---|---|---|
| Jan | 2° | -6° | 81 mm | 87% |
| Feb | 3° | -5° | 81 mm | 85% |
| Mar | 8° | -2° | 100 mm | 82% |
| Apr | 14° | 4° | 102 mm | 79% |
| May | 20° | 10° | 98 mm | 80% |
| Jun | 25° | 16° | 117 mm | 79% |
| Jul | 29° | 19° | 109 mm | 74% |
| Aug | 28° | 19° | 114 mm | 73% |
| Sep | 25° | 15° | 105 mm | 74% |
| Oct | 18° | 8° | 122 mm | 78% |
| Nov | 11° | 2° | 91 mm | 82% |
| Dec | 5° | -2° | 116 mm | 86% |
Source: NASA POWER (MERRA-2 reanalysis), averaged over the roughly 50 km grid area around Union City. Values describe typical conditions, not a forecast.
About Union City weather
Union City sits within New Jersey's humid continental-to-subtropical climate along the mid-Atlantic coast, about 13 km east of Newark. Conditions turn hot with warm, humid summers (June–August) with highs around 28–32°C. By December, expect cold winters (December–February) with regular snow and coastal storms. This page shows live, auto-refreshing weather for Union City: current conditions, an hourly breakdown, a 16-day outlook, a date-lookup tool for any past or future date, and real-time air quality, sourced from Open-Meteo. Local timezone: America/New_York.
Frequently asked questions
Union City is about 13 km east of Newark, in New Jersey.
Union City sees cold winters (December–February) with regular snow and coastal storms.
The live current conditions, hourly forecast and 16-day outlook above are pulled in real time for Union City's exact coordinates. No fixed schedule, the page updates whenever you load it.
July is usually the hottest month in Union City, with average daytime highs of about 29°C and nights around 19°C.
The coldest nights come in January, when the average low is about -6°C and daytime highs reach around 2°C. Frost is possible on clear, calm nights.
Union City receives about 1240 mm of rain in a typical year. October is the wettest month at roughly 122 mm, and the main rainy period is March to April, June to October and December.
May usually offers the most comfortable weather in Union City, with mild daytime temperatures and little rain.
In November Union City typically sees daytime highs near 11°C and lows near 2°C, with about 91 mm of rain over the month and average humidity around 82%. Check the live forecast above for this week's actual conditions.
Up to 16 days ahead using the extended forecast and date picker above; further-out or historical dates use the same date lookup tool.
Live temperature for Union City is shown at the top of this page and refreshes automatically — see the hourly breakdown below for how it changes through the day.
Union City's day-to-day weather follows the broader pattern of New Jersey described above. See the hourly weather forecast or the air quality index for more detail.