Below freezing temperatures overnight in the Lodi area will continue for at least one more day.
Although today's daytime temperatures are forecast to hit 50, overnight it will still be below 30 degrees, according to AccuWeather.com, a private weather forecasting firm.
Because icy road conditions can linger into the late morning hours, the California Office of Traffic Safety is warning motorists to slow down and pay extra attention to possible black ice, especially during commute hours when it is coldest.
Black ice is caused when moisture on roadways freezes, often in the shade. It can be hard to see since asphalt is black.
Sprinklers left on can also make sidewalks hazardous to pedestrians if the water ices over.
Motorists should ensure car windows are clear of ice or frost before driving.
And the California Highway Patrol encourages drivers traveling out of the area to check online for chain requirements and possible road closures. Many mountain passes, including Highways 4 and 89, are closed for winter. Others may be shut down depending on weather conditions.
Also, make sure brakes, windshield wipers, defroster, heater, tires and exhaust system are in top working order.
The Lodi area has been under a hard freeze watch since last Wednesday, resulting in a number of sites opening overnight as warming centers.
In Lodi, the San Joaquin County Community Center at 415 S. Sacramento St. will remain open during the day, from 8 a.m. to 5 p.m., through Friday.
The Salvation Army Hope Harbor shelter, 622 N. Sacramento St., is available overnight.
The city of Galt's overnight warming center will remain open through Wednesday morning. It is located at the Parks and Recreation Department office, 610 Chabolla Ave.
It is not clear whether the Lodi area hit any records over the weekend, but Monday's low temperature was about 15 degrees colder than the average this time of year.
Daytime temperatures are forecast to rise slightly through the 50s as we inch toward the end of the work week. However, overnight temperatures will still be just above freezing, at about 33 degrees each night, AccuWeather predicts.
Overnight temperatures are expected rise closer to 40 degrees by the weekend, with the long-term forecast calling for possible showers in the middle of next week.
Contact reporter Jennifer Bonnett at email@example.com.