Kennewick (WA) Monthly Rainfall & Precipitation

This page shows both the average monthly rainfall and the number of rainy days in Kennewick, Washington State, United States of America. The numbers reflect climate data gathered over a 30-year period, from 1990 to 2020. Let's now guide you through the details for a complete overview.

Kennewick sits in an arid zone with minimal moisture, averaging 186 mm (7.3 in) of rain/snowfall per year.

Monthly Precipitation Levels

The average number of days each month with precipitation (> 0.2 mm (0.01 in))

Significant seasonal changes in precipitation occur throughout the year. During the wettest month, December receives substantial snow/rainfall, averaging 30 mm (1.2 in) of precipitation, recorded across 11 snowy/rainy days.

In contrast, the driest month, August brings less rainfall, with 2.8 mm (0.1 in) over 2 rainy days.

December, the wettest month, has a maximum daytime temperature of 5°C (41°F). During the driest month August you can expect a temperature of 32°C (90°F). For more detailed insights into the city's temperatures, visit our Kennewick Temperature page.

Kennewick's average annual precipitation is 186 mm (7.3 in). Let's compare this to some popular worldwide tourist destinations:

Chicago, USA, sees an annual precipitation of 1062 mm (42 in), with rain and snow contributing to its humid climate.

In Seoul, South Korea, the average annual precipitation is 1237 mm (49 in), with most rain falling during the summer monsoon season.

Perth, Australia, receives 565 mm (22 in) of rainfall annually, mostly during the winter months.

Ho Chi Minh City, Vietnam, receives 1955 mm (77 in) of annual rainfall, with a pronounced wet season from May to November, typical of its tropical monsoon climate.

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.

• Mawsynram in India is noted as being the wettest place on earth, with over 11 meters (36 feet) of rain falling every year.
• In contrast, Antofagasta in Chile is among the driest places on the planet, getting less than 0.1mm (0.004 inches) 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 Kennewick (WA)'s weather, including sunshine hours, humidity levels, and temperature data, visit our Kennewick (WA) Climate page.