Port Washington (WI) Temperature by Month

Port Washington in Wisconsin, United States of America sees significant seasonal temperature differences, with daytime highs between -2°C (28°F) in January and 26°C (79°F) in July, averaging 13°C (55°F) annually. Explore the full monthly breakdown below.

With significant temperature fluctuations, Port Washington enjoys distinct seasons year-round. Nighttime lows range from 16°C (61°F) in July to -10°C (14°F) in January.

The chart below illustrates the average maximum day and minimum night temperatures in Port Washington by month:

From around 4 AM to 6 AM temperatures are at their lowest; by 3 PM they've climbed to their daily peak. July, the warmest month, averages 330 hours of sunshine.

The chart below shows the average temperature throughout the year:

Port Washington's average annual maximum temperature is 13°C (55°F). To put that in context, here's how it compares to a few well-known destinations:

Seville, Spain averages 23°C (73°F) a year, one of the warmer cities in Western Europe, with long hot summers.

Queenstown, New Zealand averages 10°C (50°F) annually, remember seasons are flipped, so its coldest months fall in June and July.

Boston, USA averages 16°C (61°F) annually, with four distinct seasons and cold winters that rival northern Europe.

Perth, Australia averages 25°C (77°F) annually, with a classic Mediterranean climate, hot dry summers and mild wet winters.

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 Port Washington's weather, including monthly rainfall, sunshine hours, and humidity, visit our Port Washington climate page.