Average September Temperatures at Cities in California





Average daily high and low temperatures for September at dozens of cities throughout California are listed below in degrees Fahrenheit and Celsius.

You can jump to separate tables for cities in Southern California and Northern California.

The tables give the normal maximum and minimum temperatures based on weather data collected from 1991 to 2020 by the US National Centers for Environmental Information.

Northern California

September temperature averages
High °F Low °F Place High °C Low °C
87 59 Antioch 30 15
76 54 Berkeley 25 12
91 55 Chico 33 13
85 50 Clearlake 30 10
86 58 Concord 30 14
90 55 Davis 32 13
64 51 Eureka 18 10
87 57 Fairfield 31 14
78 56 Fremont 26 13
91 63 Fresno 33 17
82 52 Grass Valley 28 11
77 58 Hayward 25 14
86 55 Livermore 30 13
89 58 Madera 32 15
89 56 Merced 32 13
89 59 Modesto 32 15
84 53 Napa 29 12
77 58 Newark 25 14
75 57 Oakland 24 14
High °F Low °F Place High °C Low °C
80 53 Palo Alto 26 12
82 51 Petaluma 28 11
92 62 Porterville 34 17
91 59 Red Bluff 33 15
92 58 Redding 34 15
79 54 Redwood City 26 12
75 56 Richmond 24 13
89 59 Sacramento 32 15
70 56 San Francisco 21 13
81 57 San Jose 27 14
81 54 San Rafael 27 12
84 51 Santa Rosa 29 11
87 51 Sonora 30 10
92 57 Stockton 33 14
89 60 Tracy 32 16
88 62 Turlock 31 17
87 51 Ukiah 31 11
92 58 Vacaville 33 14
86 57 Vallejo 30 14
74 53 Watsonville 23 12
90 56 Woodland 32 13
90 56 Yuba City 32 13

Southern California

Average September temperatures
High °F Low °F Place High °C Low °C
88 64 Anaheim 31 18
91 65 Bakersfield 33 18
87 61 Burbank 30 16
77 64 Chula Vista 25 18
102 73 El Centro 39 23
87 63 Escondido 31 17
85 65 Fullerton 30 18
92 59 Hanford 33 15
89 62 Irvine 32 17
91 57 Lancaster 33 14
82 64 Long Beach 28 18
83 64 Los Angeles 28 18
71 64 Oceanside 22 18
91 64 Ontario 33 18
74 60 Oxnard 23 15
93 60 Palmdale 34 16
90 62 Pasadena 32 16
89 60 Pomona 32 16
91 62 Riverside 33 17
74 54 Salinas 24 12
77 66 San Diego 25 19
80 54 San Luis Obispo 27 12
84 64 Santa Ana 29 18
78 60 Santa Barbara 25 15
77 53 Santa Cruz 25 12
78 61 Torrance 26 16
91 58 Victorville 33 14
88 60 Visalia 31 16
Reference

NOAA National Centers for Environmental Information (NCEI). Climate Normals.

California City
Temperatures
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