Morristown (NJ) Temperature by Month
The average annual maximum temperature in Morristown, New Jersey, United States of America is 17°C (63°F), with daytime highs ranging from 3°C (37°F) in February to 30°C (86°F) in July. This page covers monthly averages, day-night differences, and how Morristown compares to cities worldwide.
Morristown Monthly Temperatures
Depending on the time of the year, temperatures range from comfortable to cold in Morristown. At night, minimum temperatures range from 17°C (63°F) in July to -7°C (19°F) in February.
The chart below illustrates the average maximum day and minimum night temperatures in Morristown by month:
Temperatures tend to bottom out between 4 AM and 6 AM, then climb to their daily peak around 3 PM. July, the warmest month, sees 271 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Morristown 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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Morristown vs World: Temperature Compared
Morristown's average annual maximum temperature is 17°C (63°F). To put that in context, here's how it compares to a few well-known destinations:
Barcelona, Spain has an annual average of around 21°C (70°F), with warm summers and mild, fairly short winters.
Reykjavík, Iceland averages 9°C (48°F) a year — mild summers by Icelandic standards, but cold winters and frequent wind.
Beijing, China averages 20°C (68°F) annually, but with big seasonal swings — very cold winters and hot summers.
Perth, Australia averages 25°C (77°F) annually, with a classic Mediterranean climate — hot dry summers and mild wet winters.
What Does the Temperature Feel Like in Morristown?
Temperature alone doesn't tell the whole story — humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.
In the cooler months, when temperatures drop below 10°C, high humidity makes the cold feel more cutting than it would in dry conditions.
In Morristown, February is the coolest month, with average highs of 4°C (39°F) and humidity around 59% — considered moderate. In July, the warmest month, temperatures average 30°C (86°F) with 64% humidity — conditions that feel high. For a full picture, see our humidity page.
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 Morristown's weather — including monthly rainfall, sunshine hours, and humidity — visit our Morristown climate page.
