Approximately how many inches of rainfall does eastern Washington receive annually?

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Multiple Choice

Approximately how many inches of rainfall does eastern Washington receive annually?

Explanation:
Eastern Washington has a dry, rain-shadowed climate, with the Cascade Mountains blocking much of the Pacific moisture. That widely limits annual precipitation, so most areas receive only a small amount of rain each year. The typical total is around eight inches, with some locations a bit more or less, which makes it much drier than western Washington. That low rainfall is one reason irrigation is essential for vineyards here, while the ample sunshine supports good grape ripening. Snowfall does occur and contributes to water supply when it melts, but the overall annual precipitation remains in that low range.

Eastern Washington has a dry, rain-shadowed climate, with the Cascade Mountains blocking much of the Pacific moisture. That widely limits annual precipitation, so most areas receive only a small amount of rain each year. The typical total is around eight inches, with some locations a bit more or less, which makes it much drier than western Washington. That low rainfall is one reason irrigation is essential for vineyards here, while the ample sunshine supports good grape ripening. Snowfall does occur and contributes to water supply when it melts, but the overall annual precipitation remains in that low range.

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