Somerset (PA) Temperature by Month

Somerset in Pennsylvania, United States of America sees significant seasonal temperature differences, with daytime highs between 1°C (34°F) in January and 26°C (79°F) in July, averaging 14°C (57°F) annually. Explore the full monthly breakdown below.

The climate in Somerset is known for significant temperature differences throughout the year. At night, this contrast is just as clear, with lows ranging from 13°C (55°F) in July to -10°C (14°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 255 hours of sunshine.

The chart below shows the average temperature throughout the year:

Somerset's average annual maximum temperature is 14°C (57°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.

Zermatt, Switzerland averages just 4°C (39°F) annually due to its altitude, with very cold winters and cool summers even at its warmest.

Chicago, USA averages 15°C (59°F) annually, known for extreme seasonal swings, from bitterly cold winters to warm summers.

Tokyo, Japan averages 21°C (70°F) a year, with hot summers, cool winters, and a well-defined cherry blossom spring.

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.

Seasonal temperature shifts influence more than just how warm it feels, they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.

Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Somerset this rarely lasts long on the ground.

For more on Somerset's weather, including monthly rainfall, sunshine hours, and humidity, visit our Somerset climate page.