Here are Thursday's coldest pre-dawn temperatures in San Diego County

The tail of a cold air mass dropped temperatures into the 20s, 30s and 40s before dawn on Thursday. The daytime high will only reach the mid-50s in San Diego, and the 40s in most other parts of the county.

Here’s a sample of Thursday’s pre-dawn temperatures.

Caneron: 22

Sunrise Highway: 26

Lake Morena: 23

Mt. Laguna: 21

Julian: 25

Descanso: 27

Campo: 28

Alpine: 33

Oceanside: 34

Carlsbad: 36

Camp Pendleton: 31

Solana Beach: 37

Del Mar: 38

San Marcos: 38

La Jolla: 41

Santee: 36

Palomar Mountain: 22

Rancho Santa Fe: 39

Chula Vista: 42

Miramar MCAS: 43

Vista: 36

Warners: 25

Poway: 36

Gillespie Field: 36

El Cajon: 36

La Mesa: 37

National City: 41

San Diego International Airport: 45

Leucadia: 43

Spring Valley: 40

Imperial Beach: 43

Dehesa: 38

Source: NWS

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