Low-pressure systems in southern California during June and July and a cyclonic phenomenon called the "Catalina eddy effect" have increased inland cloud conditions keeping summer temperatures cooler. Except for the mountain ranges and desert regions, Southern California has experienced below normal temperatures since April.
For gardeners and farms that cooler season has prevented fruits and vegetables from ripening. Jill Morganelli, horticulture curator at the Los Angeles County Arboretum noted:
"The fruits and vegetables, the tomatoes and a lot of the citrus and things like raspberries are not ripening up because it's not getting hot long enough," she said, adding that some fruit could taste less sweet because less sun means less sugar content.Read more: Temperatures continue well below average in Southern California - Whittier Daily News
Morganalli said she has picked just one fully ripened tomato so far from her own summer garden.
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