Historical weather data, all-time temperature records, and monthly climate averages for Ukiah, CA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in Ukiah runs mild, with highs typically landing around 63° and lows near 41°. There's about a 1-in-3 chance of rain today, though the date has swung as warm as 80° back in 2011 and dipped to a frosty 31° in 2009.
Ukiah plays for keeps when it comes to heat — the all-time high of 117° set in July 2024 puts it among the most extreme inland valley climates in Northern California. On the other end, a 2013 cold snap pushed temps down to 18°, and a single October day in 2021 dumped nearly 5 inches of rain.
Summers here are legitimately scorching, with late July averaging a high of 97° — plan accordingly if you're heat-sensitive. Winter is mild but wet, with late December delivering both the coolest days (highs around 55°) and the most rainfall. Spring and fall offer the most comfortable windows for a visit.