As Heat Wave Approaches, Riverside County Experiencing Warmest Winter On Record
By Toni Mcallister
Published on March 11, 2026.
Riverside County is experiencing the warmest winter on record, with temperatures expected to reach 100 degrees across most of the county. A hot, dry upper-level ridge is forecast to move over the region, which could bring significant heat. Despite this, most of Southern California remains hot and dry through the weekend. A heat advisory is in effect across western Riverside County from 10 a.m. to 8pm. The National Weather Service has high confidence in continued well-above-normal temperatures and dry conditions next week. From December 2025 through February 2026, Riverside experienced an average temperature of 58.7, the county's warmest ever average.
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