1750Economy
=== Russian era ===
Russian American company led by commander Ross visited Ukiah and the Russian River in 1750, during their exploration of the Alaskan Northwest and Hawaii.
1857History
Perkins in the spring of 1857, and the latter moved his family into the valley.
1858Architecture
The first United States post office opened in 1858.
1859History
By 1859, the population of Ukiah had grown to about 100 people, making it a community sufficient in size to serve as the county seat.
1865Architecture
=== Early American era ===
In 1865, Samuel Lowry built a log cabin approximately on the corner of today's East Perkins and North Main streets.
1868History
The beer flavoring agent was first grown there in 1868 when L.F.
1870History
In 1870 the remainder of the trip to Ukiah took another two days by horse.
1876Government
Ukiah was incorporated in 1876.
1880History
Palmer, Lyman (1880).
1885History
The climate proved suitable for the crop and production expanded, peaking in 1885.
1889Architecture
It was not until 1889 that the San Francisco and North Pacific Railroad completed its line from Cloverdale to Ukiah, linking the Mendocino County seat to the national rail network.
1890History
Mendocino County remained the third-largest producer of hops in the state of California in 1890, with well over 900 acres (3.6 km2) under cultivation.
1898History
The record low temperature was 12 °F (−11.1 °C) on January 12, 1898.
1909History
The greatest monthly precipitation was 30.75 inches (781.0 mm) in January 1909 and the greatest 24-hour precipitation was 6.18 inches (157.0 mm) on December 22, 1964.
1976Civil Rights
The greatest recorded snowfall was 1.5 inches (3.8 cm) on March 2, 1976, while the most in a month was 5 inches (13 cm) in March 1896 and January 1952.
1987Culture
Ukiah was named in the 1987 Dragnet film as being where Frank Smith, Joe Friday's partner, moved to after quitting the force and buying a goat farm.
1997History
The wettest "rain year" was from July 1997 to June 1998 with 72.74 inches (1,847.6 mm) and the driest from July 1976 to June 1977 with 14.20 inches (360.7 mm).
2008Economy
On December 1, 2008, the company announced it would be shutting down major operations at the end of the year due to bankruptcy.
2011History
As of 2011, the main facility was slated to reopen as a composting and trash-sorting facility.
2022History
The record high temperature was 117 °F (47.2 °C) on September 6, 2022, and July 6, 2024.