Tukwila (WA) Rainfall & Precipitation: Monthly Averages and Year-Round Insights
This page shows both the average monthly rainfall and the number of rainy days in Tukwila, Washington State, United States of America. These values are calculated using 30 years of data (1990–2020) to ensure accuracy. Now, let’s explore all the details to give you a full picture.
Generally, Tukwila experiences moderate precipitation patterns, averaging 991 mm yearly.
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm)
Significant seasonal changes in precipitation occur throughout the year. During the wet season, November receives substantial rainfall, averaging 160 mm of precipitation, recorded across 20 rainy days.
In contrast, the drier season, July brings less rainfall, with 14 mm over 4 rainy days.November, the wettest month, has a maximum daytime temperature of 11°C. The city receives 73 hours of sunshine in this period. During the driest month July you can expect a temperature of 25°C. For more detailed insights into the city’s temperatures, visit our Tukwila Temperature page.
Annual Precipitation in the United States of America
The map below shows the annual precipitation across the United States of America. You can also select the different months in case you are interested in a specific month.





Amsterdam Precipitation Compared World Wide
Tukwila’s average annual precipitation is 991 mm. Let’s compare this to some popular worldwide tourist destinations:
The climate in San Francisco, USA, is influenced by coastal weather, with 469 mm of rainfall mostly during the winter months.
Osaka, Japan, experiences 1507 mm of rainfall annually, spread across the year with wetter summers.
Adelaide, Australia, enjoys 511 mm of annual precipitation, with dry summers and wet winters.
Ho Chi Minh City, Vietnam, receives 1955 mm of annual rainfall, with a pronounced wet season from May to November, typical of its tropical monsoon climate.
How is Precipitation Measured?
Precipitation amounts are measured using specific gauges installed at weather stations, collecting both rain and snow and any other type of precipitation. Rainfall is measured directly in millimeters, while that from snow and ice is obtained by melting it. Automated systems often incorporate heaters to make this easier.
Information from these stations is transmitted via Wi-Fi, satellite, GPS, or telephone connections to central monitoring networks. This information is immediately updated and integrated into weather models and forecasts.
Interesting weather facts
- Mawsynram in India is noted as being the wettest place on earth, with over 11 meters of rain falling every year.
- In contrast, Antofagasta in Chile is among the driest places on the planet, getting less than 0.1mm per year, with some years recording virtually no rainfall.
- Nearly 1,650 thunderstorm cells are estimated over the planet at any given time.
For more detailed information about Tukwila (WA)’s weather, including sunshine hours, humidity levels, and temperature data, visit our Tukwila (WA) Climate page.