Port Townsend (WA) Temperature by Month
Port Townsend, Washington State, United States of America has an average annual maximum temperature of 13°C (55°F), ranging from 8°C (46°F) in December to 20°C (68°F) in July. Below you'll find a full monthly breakdown and a comparison with cities worldwide.
Port Townsend Monthly Temperatures
The climate in Port Townsend is known for significant temperature differences throughout the year. At night, this contrast is just as clear, with lows ranging from 12°C (54°F) in July to 3°C (37°F) in December.
The chart below illustrates the average maximum day and minimum night temperatures in Port Townsend by month:
Low temperatures are most often recorded between 4 AM and 6 AM, while highs typically occur around 3 PM. July, the city's warmest month, sees 331 hours of sunshine.
The chart below shows the average temperature throughout the year:
Temperature: Port Townsend 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.
very warm
warm
pleasant
moderate
cold
very cold
Port Townsend vs World: Temperature Compared
Port Townsend'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.
On the cooler end, Oslo, Norway averages just 10°C (50°F) annually, with pleasant summers but long, cold winters.
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.
Global average temperatures have risen by around 1.2°C since the pre-industrial era, and the effects are visible across many regions. Winters are milder on average, with fewer frost days and less snow in many parts of the world. Heatwaves are more frequent and more intense, and Europe's summers of 2018, 2019, and 2020 all set records.
Summers are also getting drier in some areas, while winter rainfall has increased in others. This contributies to higher river levels and more flooding. In many countries, spring arrives earlier and autumn lasts longer. It has knock-on effects for wildlife, agriculture, and local ecosystems.
For more on Port Townsend's weather — including monthly rainfall, sunshine hours, and humidity — visit our Port Townsend climate page.
