Somerset (NJ) Temperature by Month
The average annual maximum temperature in Somerset, New Jersey, United States of America is 18°C (64°F), with daytime highs ranging from 5°C (41°F) in January to 31°C (88°F) in July. This page covers monthly averages, day-night differences, and how Somerset compares to cities worldwide.
Somerset Monthly Temperatures
Visitors to Somerset will encounter a climate influenced by big temperature differences across the year. Nighttime temperatures range from 19°C (66°F) in July to -5°C (23°F) in January.
The chart below illustrates the average maximum day and minimum night temperatures in Somerset by month:
The coolest part of the day is typically between 4 AM and 6 AM, while 3 PM is usually the warmest, when solar heating is at its peak. July, the city's warmest month, averages 269 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Somerset vs the United States of America
The map below shows the annual temperature across the United States of America. You can also select individual months if you want to compare a specific time of year.
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Somerset vs World: Temperature Compared
Somerset's average annual maximum temperature is 18°C (64°F). To put that in context, here's how it compares to a few well-known destinations:
Athens, Greece sits at 23°C (73°F) on average, with hot dry summers and mild winters characteristic of the Mediterranean.
On the cooler end, Oslo, Norway averages just 10°C (50°F) annually, with pleasant summers but long, cold winters.
Buenos Aires, Argentina averages 23°C (73°F) a year, with hot summers and mild winters — and seasons reversed compared to Europe.
Brisbane, Australia averages 26°C (79°F) a year, with warm winters and hot, humid summers.
Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.
The readings come from a range of sources — land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.
For cities and regions with significant elevation, altitude is one of the biggest factors shaping local temperatures. As a rule of thumb, temperatures fall by around 6°C for every 1,000 metres gained — so a city at 2,000 metres will typically be around 12°C cooler than a city at sea level in the same region. Higher ground also tends to see more dramatic day-to-night temperature swings, since thinner air loses heat faster after sunset.
For more on Somerset's weather — including monthly rainfall, sunshine hours, and humidity — visit our Somerset climate page.
