NEW: Central US Winter Storms February 2021 UPDATED: Arctic Amplification UPDATED: Winter Storm Risk Increase Maps: California Temperature and Precipitation 2017-2018 Water Year by Western Regional Climate Center | Desert Research Institute Average MAXIMUM temperature departure from average Oct 1, 2017 - Jan 31, 2018 Average MINIMUM temperature departure from average Oct 1, 2017 - Jan 31, 2018 AVERAGE temperature departure from average Oct 1, 2017 - Jan 31, 2018 Precipitation PERCENT of average from Oct 1, 2017 - Jan 31, 2018 Precipitation DEPARTURE from average Oct 1, 2017 - Jan 31, 2018 Go to Site Related Events Western US Snow Drought Winter 2018