Washington Temperature by Month

The average annual maximum temperature in Washington, Tyne and Wear, United Kingdom is 14°C (57°F), with daytime highs ranging from 8°C (46°F) in January to 21°C (70°F) in July. This page covers monthly averages, day-night differences, and how Washington compares to cities worldwide.

The weather in Washington experiences significant differences between warm and cold seasons, with big shifts in temperature. At night, minimum temperatures range from 12°C (54°F) in July to 3°C (37°F) in January.

The chart below illustrates the average maximum day and minimum night temperatures in Washington 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 187 hours of sunshine.

The chart below shows the average temperature throughout the year:

Washington'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.

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.

Melbourne, Australia averages 20°C (68°F) annually, known for unpredictable weather, with four seasons sometimes happening in one day.

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