New Brunswick, New Jersey Weather
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Climate of New Brunswick: monthly averages
Based on 25 years of satellite and reanalysis data (2001-2025), July is usually the hottest month in New Brunswick, with average daytime highs around 29°C. January is the coolest, when nights typically fall to about -5°C and frost is possible on the coldest nights. That is a wide yearly range of roughly 34°C, so the seasons feel very different from each other.
The area receives about 1230 mm of rain in a typical year. Most of it falls from March, June to August, October and December (around 55% of the yearly total), and June is the wettest month at roughly 117 mm.
For outdoor plans and travel, May and September usually offer the most comfortable weather in New Brunswick, with mild days and relatively little rain.
| Month | Avg high | Avg low | Rainfall | Humidity |
|---|---|---|---|---|
| Jan | 3° | -5° | 82 mm | 85% |
| Feb | 4° | -4° | 80 mm | 84% |
| Mar | 9° | -1° | 103 mm | 81% |
| Apr | 15° | 4° | 99 mm | 79% |
| May | 21° | 10° | 98 mm | 79% |
| Jun | 26° | 16° | 117 mm | 78% |
| Jul | 29° | 19° | 117 mm | 73% |
| Aug | 29° | 19° | 114 mm | 73% |
| Sep | 25° | 15° | 98 mm | 74% |
| Oct | 18° | 9° | 113 mm | 78% |
| Nov | 12° | 3° | 91 mm | 81% |
| Dec | 6° | -2° | 115 mm | 85% |
Source: NASA POWER (MERRA-2 reanalysis), averaged over the roughly 50 km grid area around New Brunswick. Values describe typical conditions, not a forecast.
About New Brunswick weather
New Brunswick is set in New Jersey's humid continental-to-subtropical climate along the mid-Atlantic coast, about 36 km south-west of Newark. Summers bring warm, humid summers (June–August) with highs around 28–32°C. The year winds down with cold winters (December–February) with regular snow and coastal storms. This page shows live, auto-refreshing weather for New Brunswick: 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
New Brunswick is about 36 km south-west of Newark, in New Jersey.
New Brunswick 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 New Brunswick's exact coordinates. No fixed schedule, the page updates whenever you load it.
July is usually the hottest month in New Brunswick, 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 -5°C and daytime highs reach around 3°C. Frost is possible on clear, calm nights.
New Brunswick receives about 1230 mm of rain in a typical year. June is the wettest month at roughly 117 mm, and the main rainy period is March, June to August, October and December.
May and September usually offer the most comfortable weather in New Brunswick, with mild daytime temperatures and little rain.
In November New Brunswick typically sees daytime highs near 12°C and lows near 3°C, with about 91 mm of rain over the month and average humidity around 81%. 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 New Brunswick is shown at the top of this page and refreshes automatically — see the hourly breakdown below for how it changes through the day.
New Brunswick'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.