This data is not inclusive of all cities, but just from the stations and cities that are tracked on this site and that have at least 30 years of complete data to compare against. This data is subject to change as it gets finalized, which can take a couple months for some stations.

Daily Record Highs:
   83°: San Francisco, CA (SFD) [based on 104 years of data] {previous daily record: 79° in 1976}
   85°: Santa Maria, CA (SMX) [based on 77 years of data] {previous daily record: 82° in 2007}
   89°: San Francisco, CA (SFO) [based on 80 years of data] {previous daily record: 84° in 1964}

Daily Record Cold Highs:
   82°: Furnace Creek, CA (DVF) [based on 64 years of data] {previous daily record: 90° in 1984}
   74°: Bakersfield, CA (BFL) [based on 88 years of data] {previous daily record: 77° in 1959}
   72°: Lancaster, CA (WJF) [based on 51 years of data] {previous daily record: 79° in 1983}
   64°: Big Bear Lake, CA (NOAA) [based on 65 years of data] {previous daily record: 65° in 1983}
   62°: South Lake Tahoe, CA (TVL) [based on 57 years of data] {previous daily record: 63° in 1975}

Daily Record Warm Lows:
   51°: South Lake Tahoe, CA (TVL) [based on 57 years of data] {previous daily record: 48° in 2020, 2017}
   69°: Sacramento, CA (SAC) [based on 84 years of data] {previous daily record: 68° in 1964, 1950}
   72°: Sacramento, CA (STO) [based on 148 years of data] {previous daily record: 69° in 1995, 1950}

Daily Record Lows:
   71°: Furnace Creek, CA (DVF) [based on 64 years of data] {previous daily record: 72° in 1983, 1976}

Daily Record 24-hour Precipitation:
    0.11 inches: Santa Barbara, CA (SBA) [based on 82 years of data] {previous daily record: 0 inches in }
    0.12 inches: Fresno, CA (FAT) [based on 77 years of data] {previous daily record: 0 inches in }
    0.43 inches: South Lake Tahoe, CA (TVL) [based on 57 years of data] {previous daily record: 0 inches in }
    0.76 inches: Newport Beach, CA (NOAA) [based on 104 years of data] {previous daily record: 0.07 inches in 1934}
    1.08 inches: Bakersfield, CA (BFL) [based on 88 years of data] {previous daily record: 0 inches in }
    1.63 inches: Torrance, CA (NOAA) [based on 93 years of data] {previous daily record: 0 inches in }
    1.82 inches: San Diego, CA (SAN) [based on 86 years of data] {previous daily record: 0.01 inches in 2014}
    2.03 inches: Los Angeles, CA (LAX) [based on 81 years of data] {previous daily record: 0 inches in }
    2.20 inches: Furnace Creek, CA (DVF) [based on 64 years of data] {previous daily record: 0.08 inches in 1983}
    2.27 inches: Long Beach, CA (LGB) [based on 76 years of data] {previous daily record: 0 inches in }
    2.62 inches: Big Bear Lake, CA (NOAA) [based on 65 years of data] {previous daily record: 2.60 inches in 2003}
    2.64 inches: Thermal, CA (TRM) [based on 75 years of data] {previous daily record: 0.09 inches in 1988}
    3.59 inches: Lancaster, CA (WJF) [based on 51 years of data] {previous daily record: 0 inches in }
    4.62 inches: Sandberg, CA (SDB) [based on 77 years of data] {previous daily record: 0 inches in }

Monthly Records Broken or Tied on August 20, 2023

Monthly Record Cold Highs:
   74°: Bakersfield, CA (BFL) [based on 88 years of data] occurred on Aug 20, 2023 {previous monthly record: 77° on Aug 20, 1959}
   82°: Furnace Creek, CA (DVF) [based on 64 years of data] occurred on Aug 20, 2023, Aug 16, 1984 {previous monthly record: 85° on Aug 17, 1977}

Monthly Record 24-hour Precipitation:
    1.08 inches: Bakersfield, CA (BFL) [based on 88 years of data] occurred on Aug 20, 2023 {previous monthly record: 1.03 inches on Aug 17, 1977}
    1.82 inches: San Diego, CA (SAN) [based on 86 years of data] occurred on Aug 20, 2023 {previous monthly record: 1.44 inches on Aug 16, 1977}
    2.20 inches: Furnace Creek, CA (DVF) [based on 64 years of data] occurred on Aug 20, 2023 {previous monthly record: 1.70 inches on Aug 5, 2022}
    2.27 inches: Long Beach, CA (LGB) [based on 76 years of data] occurred on Aug 20, 2023 {previous monthly record: 1.75 inches on Aug 17, 1977}
    2.62 inches: Big Bear Lake, CA (NOAA) [based on 65 years of data] occurred on Aug 20, 2023 {previous monthly record: 2.60 inches on Aug 20, 2003}
    2.64 inches: Thermal, CA (TRM) [based on 75 years of data] occurred on Aug 20, 2023 {previous monthly record: 2.44 inches on Aug 16, 1977}
    3.59 inches: Lancaster, CA (WJF) [based on 51 years of data] occurred on Aug 20, 2023 {previous monthly record: 1.80 inches on Aug 16, 1983}
    4.62 inches: Sandberg, CA (SDB) [based on 77 years of data] occurred on Aug 20, 2023 {previous monthly record: 1.67 inches on Aug 17, 1977}

All-time Records Broken or Tied on August 20, 2023

Record 24-hour Precipitation:
    2.20 inches: Furnace Creek, CA (DVF) occurred on Aug 20, 2023 {previous all-time 24-hour record: 1.70 inches on Aug 5, 2022}
    3.59 inches: Lancaster, CA (WJF) occurred on Aug 20, 2023 {previous all-time 24-hour record: 2.93 inches on Mar 1, 1983}