Renton (WA) Temperatures: Monthly Averages and Year-Round Insights
On this page, we’ll explore temperature statistics for Renton in Washington State, United States of America, including day and night variations and monthly averages. We’ll also compare the annual temperature to other cities in the United States of America.
Monthly Temperature Averages
The weather in Renton experiences significant differences between warm and cold seasons, with big shifts in temperature. Average maximum daytime temperatures reach a warm 25°C in July. In December, the coolest month of the year, temperatures drop to a cold 7°C. At night, expect even cooler temperatures, with lows averaging around 2°C.
The chart below illustrates the average maximum day and minimum night temperatures in Renton by month:
The lowest temperatures typically occur between 4 AM and 6 AM, while the peak temperatures are generally observed around 3 PM, when the sun's heating is most intense. July, the city’s warmest month, enjoys 312 hours of sunshine.
The chart below shows the average temperature throughout the year:
December, the city’s coldest month, sees about 152 mm of rainfall spread over roughly 20 days. It records 54 hours of sunshine of sunshine.
Annual Temperatures in the United States of America Compared
The map below shows the annual temperature across the United States of America. You can also select the different months in case you are interested in a specific month.






Renton Temperatures Compared World Wide
Renton’s average annual maximum temperature is 16°C. Let’s compare this with some popular tourist destinations:
In Barcelona, Spain, the average annual temperature is around 21°C, resulting in warm summers and mild winters throughout the year.
In contrast, in Zermatt, Switzerland, the average annual temperature is significantly lower at 4°C, with mild summers and very cold winters.
The climate in San Francisco, USA, is mild, with an average annual temperature of 19°C and minimal seasonal variation.
Adelaide, Australia, enjoys warm summers and mild winters, with an average annual temperature of 21°C.
How does the temperature feel?
Humidity is an essential factor in how you experience temperature. When a warm period is accompanied by high humidity, it results in a higher perceived temperature. This is especially true when temperatures exceed 25°C, as it can cause greater discomfort.
On the other hand, in cooler months, especially when temperatures dip below 10°C, high humidity can intensify the cold. This makes the air feel much colder than it really is.
In Renton, during the coolest month, December, you will experience 80% humidity, which is considered very high. This is accompanied by an average maximum temperature of 7°C. In the warmest month, July, the humidity is 65% combined with an average maximum temperature of 25°C, which creates a high-feel temperature. Explore our detailed page on humidity levels for further details.
How are these Temperatures Measured?
Generally, temperature data depicting climate is usually given over a 30-year average in order to reduce short-term fluctuations and reveal better long-term trends in climate conditions.
This temperature data is taken from land-based thermometers, ocean buoys, ships, and satellites. These measurements are transmitted to weather stations and climate centers around the globe where they are processed, averaged, and analyzed in order to monitor the trends and create climate models.
Temperatures in the Mountains
Although not all regions have mountains, elevated areas exhibit distinct temperature variations.
- Sun Exposure: Sunlit slopes tend to be warmer, while shaded areas remain cooler.
- Altitude Effects: Temperatures drop by approximately 6°C for every 1,000 meters of elevation, creating distinct microclimates.
For more detailed information about Renton’s weather, including monthly rainfall, sunshine hours, and humidity levels, visit our Renton climate page.