Tumwater (WA) Temperature by Month

The average annual maximum temperature in Tumwater, Washington State, United States of America is 16°C (61°F), with daytime highs ranging from 7°C (45°F) in December to 25°C (77°F) in July. This page covers monthly averages, day-night differences, and how Tumwater compares to cities worldwide.

Depending on the time of the year, temperatures range from comfortable to cold in Tumwater. At night, minimum temperatures range from 11°C (52°F) in July to 0°C (32°F) in December.

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

The minimum temperature is often recorded between 4 AM and 6 AM, while the highest temperature is usually reached at 3 PM, when the sun's heating effect is strongest. July, the warmest month, gets 312 hours of sunshine.

The chart below shows the average temperature throughout the year:

Tumwater's average annual maximum temperature is 16°C (61°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.

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

New York City, USA averages 17°C (63°F) a year, with hot humid summers and cold winters that bring regular snowfall.

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.

Whether a city sits on the coast or deep inland makes a significant difference to its climate. Coastal areas tend to have more stable temperatures year-round, large bodies of water absorb heat slowly in summer and release it gradually in winter, keeping extremes in check. Cities far from the sea don't benefit from that buffer, which is why continental climates tend to have hotter summers and colder winters than their coastal counterparts at the same latitude.

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