Winters in California aren’t as cold as they used to be — and that’s not a good thing. Temperatures across the Central Valley, Central Coast and parts of Southern California have increased at least 2 degrees over the past several decades, according to Climate Central’s “2023 Winter Package.” Other parts of the state have warmed at least 1 degree, and the majority of the U.S. has risen an average of 3.8 degrees, posing a long-term threat to water supplies, energy use, public health and agriculture. In California, warm and short-lived winters could disturb fruit and nut crops. Climate Central analyzed temperatures and days recorded above normal between December and February — from 1969-70 to 2022-23 — with data from the National Oceanic Atmospheric Administration’s Regional Climate Centers.